{"currentpage":1,"firstResult":0,"maxresult":10,"pagecode":5,"pageindex":{"endPagecode":5,"startPagecode":1},"records":[{"abstractinfo":"The influence of two different <span style=\"color:red\">grain</span> shapes and carbides in the HK40 alloy,the material for use of furnace tube,on the rate of creep crack growth has been investigated.The resistance to creep crack growth of the material with columnar grains is inferior than that with equiaxial grains when the load line is perpendicular to the columnar <span style=\"color:red\">grain</span> axis.The influence of secon- dary <span style=\"color:red\">carbide</span> on the rate of creep crack propagation depends upon the Brain shape.","authors":[{"authorName":"ZHU Shijie Institute of Metal Research","id":"4e8b10cf-1511-4d37-8575-4013862ab300","originalAuthorName":"ZHU Shijie Institute of Metal Research"},{"authorName":"Academia Sinica","id":"6aadd8e8-7e6e-415a-ac83-49219243b848","originalAuthorName":"Academia Sinica"},{"authorName":"Shenyang","id":"b9ed0c47-7de5-4205-8f0a-97423eb58b5b","originalAuthorName":"Shenyang"},{"authorName":"China ZHAO Jie Fushun Institute of Petrochemistry","id":"286030b1-d1c5-4acc-b61c-b7b4f0879136","originalAuthorName":"China ZHAO Jie Fushun Institute of Petrochemistry"},{"authorName":"Fushun","id":"3028c999-179a-4938-bce2-e06fc74c4dfc","originalAuthorName":"Fushun"},{"authorName":"China WANG Fugang Dalian University of Technology","id":"eb37f0c4-df46-42fe-95f7-dcd0a6ff09fd","originalAuthorName":"China WANG Fugang Dalian University of Technology"},{"authorName":"Dalian","id":"27f31810-cdc5-45ab-b196-f763850df879","originalAuthorName":"Dalian"},{"authorName":"China Institute of Metal Research","id":"b092ea42-7a42-441a-8ee0-fdca9e27a322","originalAuthorName":"China Institute of Metal Research"},{"authorName":"Academia Sinica","id":"1acf8888-1f95-47de-a683-91ac5c0b4f85","originalAuthorName":"Academia Sinica"},{"authorName":"Shenyang 110015","id":"014146c5-0920-427b-aed2-9c2a91cfa8a4","originalAuthorName":"Shenyang 110015"}],"categoryName":"|","doi":"","fpage":"449","id":"029d82a8-d23a-4b85-8c39-0f31ceab9d7b","issue":"6","journal":{"abbrevTitle":"JSXBYWB","coverImgSrc":"journal/img/cover/amse.jpg","id":"49","issnPpub":"1006-7191","publisherId":"JSXBYWB","title":"金属学报(英文版)"},"keywords":[{"id":"d04a37ab-3c10-45c7-ae49-e2bdff751401","keyword":"<span style=\"color:red\">grain</span> shape","originalKeyword":"grain shape"},{"id":"e268f5c9-636b-477b-b87d-22e0405a7002","keyword":"null","originalKeyword":"null"},{"id":"9ea69365-4951-43b6-b0c7-3bed4780fec5","keyword":"null","originalKeyword":"null"}],"language":"en","publisherId":"1006-7191_1990_6_14","title":"INFLUENCE OF <span style=\"color:red\">GRAIN</span> SHAPE AND <span style=\"color:red\">CARBIDE</span> ON CREEP CRACK GROWTH IN HK40","volume":"3","year":"1990"},{"abstractinfo":"Creep crack growth behavior of Fe-Cr15-Ni25 alloys with different <span style=\"color:red\">grain</span> boundary features has been studied.Cavities nucleate at triple junctions of <span style=\"color:red\">grain</span> boundaries for the single phase alloy and at <span style=\"color:red\">grain</span> boundary <span style=\"color:red\">carbide</span> for the alloy with <span style=\"color:red\">grain</span> boundary <span style=\"color:red\">carbide.Grain</span> bounda- ry <span style=\"color:red\">carbide</span> particles are obstacles to cavity growth and coalescence,and therefore increase the creep crack growth resistance greatly.","authors":[{"authorName":"WANG Fugang ZHU Suming ZHU Shijie REN Xiaomin TAN Yi ZHANG Junshan Dalian University of Technology","id":"61a217d7-8ef0-43e8-8b49-bac1eff46c07","originalAuthorName":"WANG Fugang ZHU Suming ZHU Shijie REN Xiaomin TAN Yi ZHANG Junshan Dalian University of Technology"},{"authorName":"Dalian","id":"feb70887-798f-40e8-84c7-5ba7f8cf4193","originalAuthorName":"Dalian"},{"authorName":"China","id":"2ac138a3-9f98-47d5-ae0b-64beee7db495","originalAuthorName":"China"}],"categoryName":"|","doi":"","fpage":"48","id":"fa8fc4a2-19ca-40bd-b41c-8c412140bd1c","issue":"1","journal":{"abbrevTitle":"JSXBYWB","coverImgSrc":"journal/img/cover/amse.jpg","id":"49","issnPpub":"1006-7191","publisherId":"JSXBYWB","title":"金属学报(英文版)"},"keywords":[{"id":"d586706a-90f7-4650-8dc8-d73e3d26adcc","keyword":"creep","originalKeyword":"creep"},{"id":"820aec00-6719-41bc-86be-5c90b51399bb","keyword":"null","originalKeyword":"null"},{"id":"edd858ca-2b17-49d7-bf84-6c7b15a9961a","keyword":"null","originalKeyword":"null"},{"id":"b80754bc-a22d-4fee-a327-e1bc93aea109","keyword":"null","originalKeyword":"null"},{"id":"bc43220a-298c-4501-9729-59192e5f137d","keyword":"null","originalKeyword":"null"}],"language":"en","publisherId":"1006-7191_1992_1_4","title":"EFFECT OF <span style=\"color:red\">GRAIN</span> BOUNDARY <span style=\"color:red\">CARBIDE</span> ON CREEP CRACK GROWTH IN Fe-Cr15-Ni25 ALLOY","volume":"5","year":"1992"},{"abstractinfo":"Modification of the <span style=\"color:red\">carbide</span> characteristics through the <span style=\"color:red\">grain</span> boundary serration is investigated, using an AISI 316 and 304 stainless steels. In both steels, triangular carbides were observed at straight <span style=\"color:red\">grain</span> boundaries while planar carbides were observed at the serrated <span style=\"color:red\">grain</span> boundaries. The serrated <span style=\"color:red\">grain</span> boundary energy is observed to be much lower than that of the straight one. Therefore, the <span style=\"color:red\">carbide</span> morphology is found to be changed from triangular to planar along the serrated boundary to reduce the interfacial energy between the <span style=\"color:red\">carbide</span> and the matrix. The creep-fatigue properties of these steels at 873K have been investigated. The creep-fatigue life of the sample with planar <span style=\"color:red\">carbide</span> at the serrated <span style=\"color:red\">grain</span> boundary was found to be much longer than that with triangular <span style=\"color:red\">carbide</span> at the straight one. These results imply that the planar carbides with lower interfacial energy have higher cavitation resistance, resulting in the retardation of cavity nucleation and growth to increase creep-fatigue life.","authors":[{"authorName":"K.J.Kim","id":"b40fdc74-c792-4d24-8d1f-01838960b9f2","originalAuthorName":"K.J.Kim"}],"categoryName":"|","doi":"","fpage":"632","id":"95c452bd-f8b0-43fa-a003-102a0817dab7","issue":"5","journal":{"abbrevTitle":"JSXBYWB","coverImgSrc":"journal/img/cover/amse.jpg","id":"49","issnPpub":"1006-7191","publisherId":"JSXBYWB","title":"金属学报(英文版)"},"keywords":[{"id":"211e3cf6-b899-44a1-ac87-d6a4d0269e3f","keyword":"cavity nucleation factor","originalKeyword":"cavity nucleation factor"},{"id":"5542a99a-c2db-44c6-91eb-f373cec6244a","keyword":"null","originalKeyword":"null"},{"id":"26f02896-44fa-4652-93fb-b19662a61c4e","keyword":"null","originalKeyword":"null"}],"language":"en","publisherId":"1006-7191_2004_5_10","title":"EFFECTS OF MODIFICATION OF THE <span style=\"color:red\">CARBIDE</span> CHARACTERISTICS THROUGH <span style=\"color:red\">GRAIN</span> BOUNDARY SERRATION ON CREEP-FATIGUE LIFE IN AUSTENITIC STAINLESS STEELS","volume":"17","year":"2004"},{"abstractinfo":"通过自制Coffin型及自约束型热疲劳试验机研究了5CrMnMc钢经不同热处理后的热疲劳行为。利用扫描电镜、透射电镜等揭示了热疲劳裂纹萌生及其扩展。结果表明,淬火态的5CrMnMo钢绝大多数热疲劳裂纹优先在晶界处萌生;淬回火态的试样裂纹主要萌生于碳化物与基体的脱开处,或形成晶界裂纹;无论是淬火或淬回火态的试样其热疲劳裂纹主要沿着碳化物与基体脱开处及晶界裂纹桥接而扩展。","authors":[{"authorName":"何世禹","id":"a83c4cc7-376d-4987-af6a-c45fe549e910","originalAuthorName":"何世禹"},{"authorName":"李瑛","id":"1af1cd32-216b-4199-abb3-43bfd17e6c41","originalAuthorName":"李瑛"},{"authorName":"刘剑虹","id":"33e52bc7-6146-4343-a90b-30a8b5c9d405","originalAuthorName":"刘剑虹"}],"categoryName":"|","doi":"","fpage":"62","id":"8d6bc7a2-873c-43dd-ad35-421d53020e20","issue":"4","journal":{"abbrevTitle":"JSXB","coverImgSrc":"journal/img/cover/JSXB.jpg","id":"48","issnPpub":"0412-1961","publisherId":"JSXB","title":"金属学报"},"keywords":[{"id":"4200ae28-e9d0-49ee-b7c1-a966300d5ae4","keyword":"热疲劳","originalKeyword":"热疲劳"},{"id":"62bf9553-8244-4e56-b743-2e27cab5a219","keyword":"<span style=\"color:red\">carbide</span> <span style=\"color:red\">grain</span>","originalKeyword":"carbide grain"},{"id":"13901ee3-1896-4755-b898-260c92dddae4","keyword":"<span style=\"color:red\">grain</span> boundary","originalKeyword":"grain boundary"}],"language":"zh","publisherId":"0412-1961_1990_4_13","title":"5CrMnMo钢的热疲劳裂纹研究","volume":"26","year":"1990"},{"abstractinfo":"Carbides in a series of cold-welding weld metals were studied by means of SEM, TEM and EPMA, and the forming mechanism of <span style=\"color:red\">carbide</span> was proposed according to their distribution and morphology. Due to their different <span style=\"color:red\">carbide</span>-forming tendency, Nb and Ti could combine with C to form particulate <span style=\"color:red\">carbide</span> in liquid weld metal and depleted the carbon content in matrix, while V induced the <span style=\"color:red\">carbide</span> precipitated along <span style=\"color:red\">grain</span> boundary. But too much Nb or Ti alone resulted in coarse <span style=\"color:red\">carbide</span> and poor strengthened matrix. When suitable amount of Nb, Ti and V coexisted in weld metal, both uniformly distributed particulate <span style=\"color:red\">carbide</span> and well strengthened matrix could be achieved. It was proposed that the <span style=\"color:red\">carbide</span> nucleated on the oxide which dispersed in liquid weld metal, and then grew into multi-layer complex <span style=\"color:red\">carbide</span> particles by epitaxial growth. At different sites, <span style=\"color:red\">carbide</span> particles may present as different morphologies.","authors":[{"authorName":"Yuanbin ZHANG","id":"3597104e-aee0-4113-9842-62fdf044ea07","originalAuthorName":"Yuanbin ZHANG"},{"authorName":" Dengyi REN","id":"57e2182d-bac2-474c-8986-4ba3da7c73f5","originalAuthorName":" Dengyi REN"}],"categoryName":"|","doi":"","fpage":"766","id":"5d509c54-8a74-4886-9e68-6e3e96f159af","issue":"6","journal":{"abbrevTitle":"CLKXJSY","coverImgSrc":"journal/img/cover/JMST.jpg","id":"11","issnPpub":"1005-0302 ","publisherId":"CLKXJSY","title":"材料科学技术（英文）"},"keywords":[{"id":"b2f78384-8621-48bb-a522-1ec65d71bf84","keyword":"Cold-welding","originalKeyword":"Cold-welding"},{"id":"c1885be7-97ea-4476-b9d9-cdc210ca0728","keyword":"null","originalKeyword":"null"},{"id":"a324a034-1695-4948-a35c-8c4918185d7c","keyword":"null","originalKeyword":"null"},{"id":"badf8397-19be-4a5d-a066-3c4c3629ca91","keyword":"null","originalKeyword":"null"}],"language":"en","publisherId":"1005-0302_2004_6_31","title":"Precipitating Mechanism of <span style=\"color:red\">Carbide</span> in Cold-Welding Surfacing Metals","volume":"20","year":"2004"},{"abstractinfo":"The precipitation of MC-type <span style=\"color:red\">carbide</span> in a DS nickel-base superalloy has been studied. The nucleating temperature of the MC <span style=\"color:red\">carbide</span> was determined by analysis. The MC <span style=\"color:red\">carbide</span> and gamma phase were complementary in composition, and the eutectic reaction of (gamma + MC) took place in different forms at varied solidification rate. The (gamma + MC) eutectic reaction was an important factor of determining the <span style=\"color:red\">carbide</span> morphology. At an extremely high solidification rate, such as quenching, the compositional ranges for the (gamma + MC) eutectic reaction was broadened and the <span style=\"color:red\">carbide</span> precipitated through the quasi-eutectic reaction of (gamma + MG). As a result, the <span style=\"color:red\">carbide</span> appearing frequency was increased noticeably The dendrites of the quasi-eutectic <span style=\"color:red\">carbide</span> formed in quenching paralleled to each other closely for facilitating diffusion between the two eutectic components of <span style=\"color:red\">carbide</span> and gamma phase. The script <span style=\"color:red\">carbide</span> precipitated at a relatively high drawing rate around 50 mu m/s. At this rate, diffusion was insufficient and the eutectic reaction of (gamma + MC) was suppressed at most. The <span style=\"color:red\">carbide</span> grew quickly along the interdendritic liquid passages due to the high degree of segregation of <span style=\"color:red\">carbide</span> forming elements there, and hence formed a very complicated dendritic structure. The faceted carbides precipitated when the drawing rate was lower than 5 mu m/s, and some of them contained a gamma phase core. The incorporation of gamma phase into the <span style=\"color:red\">carbide</span> body was caused by the eutectic reaction of (gamma + MC) in the midst of the <span style=\"color:red\">carbide</span> precipitation. Two forms of the (gamma + MC) eutectic reaction were favored by sufficient diffusion at 0.5 mu m/s drawing rate. The (gamma + MC) eutectic reaction took place at the final stage of the <span style=\"color:red\">carbide</span> precipitation in an isolated liquid pool and formed small ridges distributed uniformly on the <span style=\"color:red\">carbide</span> surface. Diffusion operated sufficiently throughout the whole residual liquid passage guaranteed the continual eutectic reaction by a sandwich like mode of gamma/MC/gamma, and the extremely long <span style=\"color:red\">carbide</span> was formed along the <span style=\"color:red\">grain</span> boundaries as a result. (C) 1999 Elsevier Science S.A. All rights reserved.","authors":[],"categoryName":"|","doi":"","fpage":"143","id":"4251aafd-38dd-473b-a828-d43711953116","issue":"42737","journal":{"abbrevTitle":"MSAEAMPMAP","id":"29fa6a83-07f2-4d3a-af3e-fac686227352","issnPpub":"0921-5093","publisherId":"MSAEAMPMAP","title":"Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing"},"keywords":[{"id":"4b32cc78-57dd-4d7d-bcd0-d1c8951ca0cc","keyword":"<span style=\"color:red\">carbide</span>;precipitation;superalloy;directional solidification","originalKeyword":"carbide;precipitation;superalloy;directional solidification"}],"language":"en","publisherId":"0921-5093_1999_42737_4","title":"The eutectic characteristic of MC-type <span style=\"color:red\">carbide</span> precipitation in a DS nickel-base superalloy","volume":"271","year":"1999"},{"abstractinfo":"Nanocrystalline tungsten <span style=\"color:red\">carbide</span>-cobalt (WC-Co) composite powders produced through spray thermal decomposition-continuous reduction and carburization technology were used to prepare Φ3.25 mm×38 mm ultrafine tungsten <span style=\"color:red\">carbide</span>-cobalt (WC-Co) cemented <span style=\"color:red\">carbide</span> rods through vacuum sintering plus sinterhip technology. The microstructure, Vickers hardness, density and Rockwell A hardness (HRA), transverse rupture strength (TRS), saturated magnetization and coercivity force were tested. The results show that the average <span style=\"color:red\">grain</span> size of the sintering body prepared through vacuum sintering plus sinterhip technology was 430~nm; transverse rupture strength (TRS) was 3850 MPa; Vickers hardness was 1890 and Rockwell A hardness of sintering body was 93. High strength and high hardness ultrafine WC-Co cemented <span style=\"color:red\">carbide</span> rods used to manufacture printed circuit board (PCB) drills were obtained.","authors":[{"authorName":"Xiaoliang SHI","id":"f4301547-8938-4eae-8b9b-57c41e1639cb","originalAuthorName":"Xiaoliang SHI"},{"authorName":" Gangqin SHAO","id":"90da861f-6009-489e-97eb-7b27f017b632","originalAuthorName":" Gangqin SHAO"},{"authorName":" Xinglong DUAN","id":"02ea5183-38d5-4c94-80d2-8cdf6ce2b2ce","originalAuthorName":" Xinglong DUAN"},{"authorName":" Runzhang YUAN","id":"d4bab654-d4cc-4dd5-8b28-7525a35545cd","originalAuthorName":" Runzhang YUAN"},{"authorName":"null","id":"f8dd419f-5e90-4c52-a634-9e995b44cb17","originalAuthorName":"null"},{"authorName":"null","id":"67834acd-7ede-458d-9344-ab38677cd390","originalAuthorName":"null"},{"authorName":"null","id":"1f643172-ce7f-45ef-8ce4-851c59b9002a","originalAuthorName":"null"}],"categoryName":"|","doi":"","fpage":"353","id":"11dff3fd-599b-4bc7-b48e-45d11c24b859","issue":"3","journal":{"abbrevTitle":"CLKXJSY","coverImgSrc":"journal/img/cover/JMST.jpg","id":"11","issnPpub":"1005-0302 ","publisherId":"CLKXJSY","title":"材料科学技术（英文）"},"keywords":[{"id":"93563f48-db09-4e0b-989e-7da685776039","keyword":"Nanocrystalline","originalKeyword":"Nanocrystalline"},{"id":"71706da5-d9cd-42d9-b185-01c0542da8df","keyword":"null","originalKeyword":"null"},{"id":"28f1d245-ebf2-4439-bfa6-0ad58b06cafc","keyword":"null","originalKeyword":"null"},{"id":"b60e6671-0707-4a23-9165-d1f6c589109b","keyword":"null","originalKeyword":"null"}],"language":"en","publisherId":"1005-0302_2005_3_5","title":"Research on Ultrafine Tungsten <span style=\"color:red\">Carbide</span>-Cobalt (WC-Co) Cemented <span style=\"color:red\">Carbide</span> Rods of Miniature Drills for Highly Integrated Printed Circuit Board (PCB)","volume":"21","year":"2005"},{"abstractinfo":"By the modification, network <span style=\"color:red\">carbide</span> was disconnected at 1100℃ through uneven dissolution at higher energy places in <span style=\"color:red\">carbide</span>, where there is twin or lattice distortion,and granulated at 1130℃ through element diffusion. The stability of M7C3 <span style=\"color:red\">carbide</span> was decreased owing to the modification reducing the segregations of Cr and M0, thus the temperature, at which uneven dissolution of <span style=\"color:red\">carbide</span> commenced, was decreased. Also lattice distortion or defect such as twin in <span style=\"color:red\">carbide</span> was increased by the modification, which prompted widespread disconnections in <span style=\"color:red\">carbide</span>. In addition, the modification prompted element diffusion to accelerate the kinetics process of <span style=\"color:red\">carbide</span> granulation.","authors":[{"authorName":"S.Q. Wang","id":"df6c1c82-ef78-4e76-b27a-bf62d5579ef3","originalAuthorName":"S.Q. Wang"},{"authorName":" Q.C. Jiang","id":"c137c42e-8107-404b-bd90-31f5eefe28e5","originalAuthorName":" Q.C. Jiang"},{"authorName":" X.H. Cui and Z.M. He(School of Materials Science and Engineering","id":"804b9122-2653-4021-b84a-d0e5061f53cc","originalAuthorName":" X.H. Cui and Z.M. He(School of Materials Science and Engineering"},{"authorName":" Jilin University of Technology","id":"cbb07d33-7a27-483b-a4b2-846840b7639f","originalAuthorName":" Jilin University of Technology"},{"authorName":" Changchun 130025","id":"d32874fa-2d12-43df-964e-51ae2734941c","originalAuthorName":" Changchun 130025"},{"authorName":" China) Manuscript received  in revised form 15 September 1998","id":"2338a68d-5ca2-4fe2-9c0d-cd4ddde50c9b","originalAuthorName":" China) Manuscript received  in revised form 15 September 1998"}],"categoryName":"|","doi":"","fpage":"167","id":"55846119-9acb-4fa2-8ab3-0158db1dc013","issue":"2","journal":{"abbrevTitle":"JSXBYWB","coverImgSrc":"journal/img/cover/amse.jpg","id":"49","issnPpub":"1006-7191","publisherId":"JSXBYWB","title":"金属学报(英文版)"},"keywords":[{"id":"c249aaa1-872b-4dfe-91e2-8f5da4b6d510","keyword":"ledeburite steel","originalKeyword":"ledeburite steel"},{"id":"0f1fc804-7069-4f95-b368-8b5f82ad6fdc","keyword":"null","originalKeyword":"null"},{"id":"efb5f33d-9849-4194-b2ce-c366f6d35616","keyword":"null","originalKeyword":"null"},{"id":"ac61b096-8585-4d97-97a5-b2ad1e3fc527","keyword":"null","originalKeyword":"null"}],"language":"en","publisherId":"1006-7191_1999_2_7","title":"EFFECT OF MODIFICATION ON <span style=\"color:red\">CARBIDE</span> GRANULATION AND ITS MECHANISM","volume":"12","year":"1999"},{"abstractinfo":"It is well known that carbides at <span style=\"color:red\">grain</span> boundaries play an important role in affecting mechanical properties of nickel based superalloys. In order to deeply understand the relationship between <span style=\"color:red\">grain</span> boundary structures and properties, in this work, we have investigated the microstructure of <span style=\"color:red\">grain</span> boundaries with different misorientation angles in bicrystals of nickel based superalloys. It is found that the bicrystals with smaller misorientation angles contain denser M23C6 but sparse MC particles at <span style=\"color:red\">grain</span> boundaries, and this kind of bicrystals presents longer stress rupture lives. It was observed that MC carbides were decorated by M23C6 and M6C particles at <span style=\"color:red\">grain</span> boundaries. The formation of these <span style=\"color:red\">carbide</span> particles, therefore, is likely due to the local fluctuation of chemical composition around MC carbides. In addition, the orientation relationships between MC carbides and gamma/gamma' matrix were also determined.","authors":[],"categoryName":"|","doi":"","fpage":"1031","id":"d732f2f6-b89d-43fc-89dc-05605a0b4b26","issue":"11","journal":{"abbrevTitle":"CLKXJSY","coverImgSrc":"journal/img/cover/JMST.jpg","id":"11","issnPpub":"1005-0302 ","publisherId":"CLKXJSY","title":"材料科学技术（英文）"},"keywords":[{"id":"0b10d0be-e5c3-4ea6-b111-5f0da00d63b9","keyword":"Electron microscopy;Ni based superalloys;<span style=\"color:red\">Grain</span> boundaries;Orientation;relationship;primary mc <span style=\"color:red\">carbide</span>;creep-properties;sx-superalloys;decomposition;rupture;rr2072","originalKeyword":"Electron microscopy;Ni based superalloys;Grain boundaries;Orientation;relationship;primary mc carbide;creep-properties;sx-superalloys;decomposition;rupture;rr2072"}],"language":"en","publisherId":"1005-0302_2012_11_5","title":"Microstructure of Carbides at <span style=\"color:red\">Grain</span> Boundaries in Nickel Based Superalloys","volume":"28","year":"2012"},{"abstractinfo":"A directionally solidified cobalt-base alloy, DZ40M, was solidified with a columnar grained austenitic matrix with a [001] preferential orientation and primary carbides of chromium-rich M7C3 and MC at <span style=\"color:red\">grain</span> boundaries and interdendritically. Secondary carbides in DZ40M alloy are chromium-rich M23C6 and tungsten-rich M6C. The M23C6 <span style=\"color:red\">carbide</span> has a cube-cube orientation relationship with the austenitic matrix. Initial precipitation of secondary <span style=\"color:red\">carbide</span>, M23C6, occurred on dislocations in the austenitic matrix of the as-cast DZ40M alloy during cooling. Aging treatment (100 to 1000 hours at 850 degrees C) produced a profusive precipitation of the M23C6 <span style=\"color:red\">carbide</span> mainly around the primary carbides. In the interior of grains, M23C6 precipitated preferentially on dislocations and stacking faults. Subsequently, M23C6 grew into laths near the primary carbides and coalesced into chains. The precipitation behavior of M23C6 can be explained by the following reaction: 23M + 6C --> M23C6. The primary carbides are a carbon reservoir for the precipitation of M23C6. The M6C <span style=\"color:red\">carbide</span> was found only on the surface of the primary M7C3 <span style=\"color:red\">carbide</span> adjacent to tungsten-rich MC in the aged condition. The precipitation of the tungsten-rich M6C is attributed to the tungsten segregation, which resulted from decomposition of the tungsten-rich MC and good lattice match between M6C and M7C3. The inhomogeneity of secondary precipitation is due to the uneven distribution of alloying elements.","authors":[],"categoryName":"|","doi":"","fpage":"513","id":"02a92d5d-8c56-4a23-8560-9c5b46d72907","issue":"3","journal":{"abbrevTitle":"MAMTAMAMS","id":"3c00bd0a-9b64-4f42-89c3-0e640883446c","issnPpub":"1073-5623","publisherId":"MAMTAMAMS","title":"Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science"},"keywords":[],"language":"en","publisherId":"1073-5623_1999_3_1","title":"Secondary <span style=\"color:red\">carbide</span> precipitation in a directionally solidified cobalt-base superalloy","volume":"30","year":"1999"}],"totalpage":233,"totalrecord":2326}