{"currentpage":1,"firstResult":0,"maxresult":10,"pagecode":5,"pageindex":{"endPagecode":5,"startPagecode":1},"records":[{"abstractinfo":"The available experimental results have been summarized concerning the effect of grain size on minimum creep rate.There are two types of creep rate-grain size relations.One is that there is a criti- cal grain size above which creep rate is independent of grain size,below which creep rate increases with the decrease of grain size.The other is that there is an intermediate grain size at which creep resistance is optimum.The first relation usually occurs at higher temperatures(>0.5 T_m),and intermediate stress ranges,while the second relation at interme- diate temperature ranges(0.4-0.5 T_m)and higher stresses.For the two types of creep rate-grain size relations,the increase of the creep rates with the de- crease of grain size for small grain sizes is all due to grain boundary sliding.For large grain sizes,a dis- location climb mechanism is dominant in creep deformation for the first relation,while a Hall-Perch grain boundary strengthening effect is believed to play an important role by dislocation glide mechanism for the second relation.","authors":[{"authorName":"LI Pei'en ** Institute of Materials Science and Engineering","id":"e40c6329-7ed8-44a4-9890-2e14279f7bf8","originalAuthorName":"LI Pei'en ** Institute of Materials Science and Engineering"},{"authorName":"Shanghai Jiaotong University","id":"4361bd10-f54c-458e-b92a-b3320afa646f","originalAuthorName":"Shanghai Jiaotong University"},{"authorName":"Shanghai 200030","id":"2fdc20e7-ebab-4e6a-9c6d-31b9cb1ff9ed","originalAuthorName":"Shanghai 200030"},{"authorName":"China+ To whom correspondence should be addressed.","id":"39b14400-db67-4e4f-8312-986dcdb02167","originalAuthorName":"China+ To whom correspondence should be addressed."}],"categoryName":"|","doi":"","fpage":"119","id":"20a0a2c9-cbbe-4323-a9bb-da5fdff60672","issue":"2","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":"0075c70d-ed70-4b02-9753-7bbaa31fd532","keyword":"grain size","originalKeyword":"grain size"},{"id":"e5abcdfc-2374-49d6-9672-f9facd6c3650","keyword":"null","originalKeyword":"null"}],"language":"en","publisherId":"1005-0302_1992_2_1","title":"On Grain Size Dependence of Minimum Creep Rate","volume":"8","year":"1992"},{"abstractinfo":"Most of the available methods for the calculation of the three dimensional(3D)grain size dis- tribution functions(SDF)are based on the S model and lead a grave systematical error.The origin is the basic supposition of spherical grains in the S model,which does not correspond with the feature of real grains.A new model called A model is developed based on the hypothe- sis of polvhedral grains.The probability functions of the A model and the method to calculate the 3D SDFs using the A model are given in the present paper.The theoretical analyses and experimental tests have demonstrated that the A model reduces the systematical error radical- ly.It is nearly as simple as the so far used S model,but gives much better results in repro- ducing of 3D SDFs from the measured ID or 2D SDFs.","authors":[{"authorName":"ZHAO Xinbing Zhejiang University","id":"766bfdbe-57d1-40ed-9cb9-0bc202f5e03e","originalAuthorName":"ZHAO Xinbing Zhejiang University"},{"authorName":"Hangzhou","id":"e0b83e8d-04a8-4b87-9ee1-4317f78b0ec8","originalAuthorName":"Hangzhou"},{"authorName":"China LCKEK Institut fur Metallkunde und Metallphysik der RWTH Aachen","id":"0964ed3c-b604-4b91-b21c-4bdbcf831092","originalAuthorName":"China LCKEK Institut fur Metallkunde und Metallphysik der RWTH Aachen"},{"authorName":"Germany Department of Materials Scicnce and Engineering","id":"4aa8b533-9334-4fa7-8146-6db319bcccbe","originalAuthorName":"Germany Department of Materials Scicnce and Engineering"},{"authorName":"Zhejiang Univer sity","id":"39140f88-a313-46cf-8ce1-edde87113a2e","originalAuthorName":"Zhejiang Univer sity"},{"authorName":"Hangzhou 310027","id":"1952b435-1018-49ed-a4ee-6bd0e714e305","originalAuthorName":"Hangzhou 310027"},{"authorName":"China","id":"070d05bb-bb1f-478a-aeb4-62baec504081","originalAuthorName":"China"}],"categoryName":"|","doi":"","fpage":"46","id":"69b2de51-b754-42da-81c8-a25b0f14d0e6","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":"5a875055-f398-400a-812b-b687f7adfa6a","keyword":"grain size","originalKeyword":"grain size"},{"id":"2ac6d4fe-89b5-4ef0-8da0-897a255a775b","keyword":"null","originalKeyword":"null"},{"id":"7c057482-4503-49df-8a3e-c73abe16c070","keyword":"null","originalKeyword":"null"},{"id":"4ff246ab-ca1e-46b4-ad61-30c21e699fa2","keyword":"null","originalKeyword":"null"}],"language":"en","publisherId":"1006-7191_1993_1_4","title":"GEOMETRIC MODEL AND APPLIED METHOD FOR THE CALCULATION OF GRAIN SIZE DISTRIBUTIONS","volume":"6","year":"1993"},{"abstractinfo":"In order to achieve the optimum conditions for electroplating nanocrystalline nickel coating from Watts-type bath, the effect of some process parameters namely, bath temperature, current density, and saccharin addition on grain size and texture coefficient (TC= I(200) /I(111) ) of the deposits were investigated by X-ray diffraction
\n(XRD). The results showed that in a bath containing 5 g/L saccharin, by increasing the bath temperature from 45°C to 55°C, the grain size decreased, whereas further increase of bath temperature resulted in a contrary effect. By increasing the current density from 10 to 75 mA/cm2, both the grain size and TC decreased, while further increase in current density had no significant effect on the grain size. At a given current density, the grain size and TC decreased rapidly by increasing the saccharin content before leveling off at 3 g/L of saccharin. Finally, based on the grain refining the optimum conditions for producing nanocrystalline nickel coating from Watts-type bath have been proposed.","authors":[{"authorName":"A.M. Rashidi A. Amadeh","id":"1718fce8-5f0d-405c-9012-f33aa093f793","originalAuthorName":"A.M. Rashidi A. Amadeh"}],"categoryName":"|","doi":"","fpage":"82","id":"59aa3698-2590-4ed5-a27a-af48e08fc560","issue":"1","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":"85909cdb-7322-422b-b641-d09a92e24c82","keyword":"Electroplating","originalKeyword":"Electroplating"},{"id":"b7dcadf5-1307-4494-87ea-140ae100114e","keyword":"grain size","originalKeyword":"grain size"},{"id":"a453f604-cfe3-4ec5-82b0-34d6d285cc2a","keyword":"Nanocrystalline Coating","originalKeyword":"Nanocrystalline Coating"}],"language":"en","publisherId":"1005-0302_2010_1_6","title":"Effect of Electroplating Parameters on Microstructure of Nanocrystalline Nickel Coatings","volume":"26","year":"2010"},{"abstractinfo":"Through combining an experimental investigation on the isothermal nanocrystallization thermodynamics of bulk amorphous selenium and a theoretical analysis, an easy and reliable way to derive the lower grain-size limit of polycrystalline materials was proposed. The grain-size limit for the polycrystalline selenium was determined to be about 4.0 nm. [S0163-1829(99)00310-0].","authors":[],"categoryName":"|","doi":"","fpage":"5987","id":"f18173b0-fcc2-41bd-9c70-0dce5999989e","issue":"9","journal":{"abbrevTitle":"PRB","id":"41d73232-e732-4216-a5f7-4b352bb955cf","issnPpub":"0163-1829","publisherId":"PRB","title":"Physical Review B"},"keywords":[{"id":"b9efce56-44d7-4180-a917-c7165eb332ac","keyword":"nanocrystalline materials;transition;silicon","originalKeyword":"nanocrystalline materials;transition;silicon"}],"language":"en","publisherId":"0163-1829_1999_9_1","title":"Grain-size limit of polycrystalline materials","volume":"59","year":"1999"},{"abstractinfo":"The effect of electric current pulses (ECP) on grain size in castings is considered. The relationship between grain size and electric current density is revealed. Numerical calculation shows that an electric current density with a magnitude of 10(3) A/cm(2) is needed to reduce the grain size by one order of magnitude for some pure metals, such as Ni, Sn, Pb, Cu, and Fe. The effects of Joule heating, skin, and pinch force are proved to be of lesser importance. The theory gives a good explanation for the experimental results reported by Conrad and co-workers.","authors":[],"categoryName":"|","doi":"","fpage":"77","id":"3009dcc2-c55b-43ed-a7cb-fe0e27beaef3","issue":"1","journal":{"abbrevTitle":"IJONP","id":"271e056f-652b-4524-9953-a84e4f1f2e41","issnPpub":"1368-9290","publisherId":"IJONP","title":"International Journal of Non-Equilibrium Processing"},"keywords":[{"id":"b7302d9f-99e5-4638-ada9-7635554a3578","keyword":"electric current pulse;grain size;nanocrystalline;conductors","originalKeyword":"electric current pulse;grain size;nanocrystalline;conductors"}],"language":"en","publisherId":"1368-9290_1998_1_1","title":"Effect of electric current pulses on grain size in castings","volume":"11","year":"1998"},{"abstractinfo":"Molecular dynamics simulations of high temperature annealing of copper bicrystals\nhave been carried out. The bicrystals have planar grain boundaries, and the gain\nsize varies in nano range. An EAM(Embedded Atom Method) potential of FS type is\nused for calculating the interatomic forces. The results show that in nanocrystalline\ncopper, GB migration driven by inter-GB reaction can take place. A critical grain\nsize is identi¯ed, below which the inter-GB reaction becomes strong enough to trigger\nGB motion, which accelerates rapidly and leads to annihilation of the grain bound-\naries. The critical size is found to be 16 atomic radii. A \\through intermediate grain\nmechanism\" is identi¯ed for the nano-grain boundary motion observed, which is never\nreported for GB migrations of conventional polycrystalline metals.","authors":[{"authorName":"L. Zhou","id":"c0825789-e9aa-4a18-96db-3698c0aee526","originalAuthorName":"L. Zhou"},{"authorName":" X.Q. Wei ","id":"c935e434-9cc3-406c-86f2-045ee26d57f9","originalAuthorName":" X.Q. Wei "},{"authorName":" N.G. Zhou","id":"3c943edc-f333-4db1-b9b3-b05835359f81","originalAuthorName":" N.G. Zhou"}],"categoryName":"|","doi":"","fpage":"11","id":"bb9da047-ae41-4b7e-a2cf-26f92fe83c1b","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":"f405a00d-40fc-4d0f-a5a3-9e36504b8d0b","keyword":"grain boundary migration","originalKeyword":"grain boundary migration"},{"id":"5934a7fa-371b-480f-9323-165f355879b1","keyword":"null","originalKeyword":"null"},{"id":"827485dd-e9d7-42d9-8e6e-b0b92acdaadf","keyword":"null","originalKeyword":"null"}],"language":"en","publisherId":"1006-7191_2004_1_18","title":"NANO SIZE EFFECT IN GRAIN BOUNDARY MIGRATION OF COPPER","volume":"17","year":"2004"},{"abstractinfo":"The relation between grain size and strength of the duplex stainless steels and influence of grain size on properties of hydrogen induced cracking in these steels have been investigated. The Hall-Petch relation between grain size and strength of the steels is also followed.The susceptibility to hydrogen induced cracking of the steels increases with increasing grain size.","authors":[{"authorName":"HE Jianhong Huazhong University of Science and Technology","id":"b23296da-2d44-4d31-a7f1-276af2f64c6b","originalAuthorName":"HE Jianhong Huazhong University of Science and Technology"},{"authorName":"Wuhan","id":"fe8eba65-88a2-4101-a8db-88e38ab66ce4","originalAuthorName":"Wuhan"},{"authorName":"ChinaTANG Xiangyun CHEN Nanping Tsinghua University","id":"f3f44811-838f-499f-9f47-b31601af07fe","originalAuthorName":"ChinaTANG Xiangyun CHEN Nanping Tsinghua University"},{"authorName":"Beijing","id":"d3c3c3df-1d39-4a3b-a871-1830568d169b","originalAuthorName":"Beijing"},{"authorName":"China Dept.of Materials Science and Engineering","id":"55e7924c-0b51-43ea-9000-1ca4e912ef52","originalAuthorName":"China Dept.of Materials Science and Engineering"},{"authorName":"Huazhong University of Science and Technology","id":"44dd275d-5571-46fb-940b-d0c796774c69","originalAuthorName":"Huazhong University of Science and Technology"},{"authorName":"Wuhan 430074","id":"a8baaa13-a4ae-4652-bb56-80f95d2fda99","originalAuthorName":"Wuhan 430074"},{"authorName":"China","id":"4f8b35e3-dfe3-4146-8997-6392a1439ab2","originalAuthorName":"China"}],"categoryName":"|","doi":"","fpage":"21","id":"e92c986d-484b-40af-a6b0-3097fe230533","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":"2e953c1b-41ba-4e28-8154-c70ef499c5a6","keyword":"duplex stainless steel","originalKeyword":"duplex stainless steel"},{"id":"55b03711-4be2-4904-b9c5-88c6f2b0a29a","keyword":"null","originalKeyword":"null"},{"id":"07a7addf-1c94-4d20-a629-11bf690f7e09","keyword":"null","originalKeyword":"null"}],"language":"en","publisherId":"1006-7191_1991_1_7","title":"INFLUENCE OF GRAIN SIZE ON STRENGTH AND HYDROGEN INDUCED CRACKING OF DUPLEX STAINLESS STEELS","volume":"4","year":"1991"},{"abstractinfo":"Porosity-free nanocrystalline element selenium (nc-Se) samples with the mean grain sizes ranging from 8 to 70 nm were: synthesized by complete crystallization of the melt-quenched amorphous Se solid. Mechanical properties including microhardness (H-nu) and elastic modulus (E) of the nc-Se samples were measured by means of nanoindentation tests and microhardness tests, respectively. With a reduction of grain size, the nc-Se samples were found to be substantially hardened. But the grain size dependence of H-nu does not follow a simple Hall-Fetch relation over the whole grain size range, exhibiting three distinct stages corresponding to three different Hall-Fetch slopes. The maximum Hall-Fetch slope was found to be in the grain size range of 15-20 nm, corresponding to large values of the: elastic modulus. This behavior can be explained in terms of the lattice distortion in the nc-Se samples that was experimentally determined by using quantitative x-ray diffraction measurements. A conclusion is drawn that the lattice structure of the nm-sized crystallites may play an important role in mechanical properties of nanocrystalline materials.","authors":[],"categoryName":"|","doi":"","fpage":"923","id":"1b9b6f6a-4171-4125-9f0d-7cbdd2c09eaf","issue":"4","journal":{"abbrevTitle":"JOMR","id":"155c387a-c8cb-4083-85f3-6b58aeef4116","issnPpub":"0884-2914","publisherId":"JOMR","title":"Journal of Materials Research"},"keywords":[{"id":"5c853508-96a7-4689-b7b3-7fd0c434173d","keyword":"hall-petch relationship;behavior;alloys;cu;ni;pd","originalKeyword":"hall-petch relationship;behavior;alloys;cu;ni;pd"}],"language":"en","publisherId":"0884-2914_1997_4_3","title":"Grain size dependence of mechanical properties in nanocrystalline selenium","volume":"12","year":"1997"},{"abstractinfo":"The apparent activation energy of serrated yielding was measured by two different methods for a commercial brass H68.The results showed that the apparent activation energy of serrat- ed yielding measured by a method involving(m+β)values increases with the grain size.In contrast,those measured by another method without involving(m+β)values are all the same for specimens with different grain sizes.Combining with the observation of the microstructures,the above phenomena have been explained.The method to measure the true activation energy of serrated yielding has also been proposed.","authors":[{"authorName":"XIAO Lingang QIAN Kuangwu Fuzhou University","id":"6effe586-fe16-479c-9232-a7b315419c69","originalAuthorName":"XIAO Lingang QIAN Kuangwu Fuzhou University"},{"authorName":"Fuzhou","id":"ecc99091-a13f-40f4-b5e3-b4080feede7d","originalAuthorName":"Fuzhou"},{"authorName":"Fujian","id":"c73ffeaa-cba7-4391-9adc-a65fe0f23bb7","originalAuthorName":"Fujian"},{"authorName":"China Correspondent:QIAN Kuangwu Professor","id":"b2abc6f0-a554-4bdc-ad9c-fe19f0777f9b","originalAuthorName":"China Correspondent:QIAN Kuangwu Professor"},{"authorName":"Institute for Materials Research","id":"e3452c80-586d-4e24-aeec-fdcbd75f8e3f","originalAuthorName":"Institute for Materials Research"},{"authorName":"Fuzhou University Fuzhou","id":"a121f785-d7fb-45fc-bd83-591607c58f4f","originalAuthorName":"Fuzhou University Fuzhou"},{"authorName":"Fujian 350002","id":"a8430d21-4910-41b9-a3fe-6b1a0b55ac30","originalAuthorName":"Fujian 350002"},{"authorName":"China","id":"5ad3352d-9f98-4d76-9633-1151d2b651e7","originalAuthorName":"China"}],"categoryName":"|","doi":"","fpage":"10","id":"3cafe7b8-c569-4ad4-9cbd-457ee70d3ea0","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":"37b87ca3-8f46-4996-92f2-ba2e2472fc13","keyword":"serrated yielding","originalKeyword":"serrated yielding"},{"id":"7409eacc-5129-4adf-b005-4f0df7fc473b","keyword":"null","originalKeyword":"null"},{"id":"4cc28b91-e5a8-48cd-b7b7-7adf713e91d0","keyword":"null","originalKeyword":"null"},{"id":"888cde9c-b7fa-4e39-b990-219918bc0e37","keyword":"null","originalKeyword":"null"}],"language":"en","publisherId":"1006-7191_1990_1_9","title":"GRAIN SIZE AND ACTIVATION ENERGY OF SERRATED YIELDING","volume":"3","year":"1990"},{"abstractinfo":"To promote effectively dynamic recrystallization and obtain a homogeneous distribution of ultrafine grain size in strip finish rolling process, the behavior of static and dynamic recrystallization must be appropriately designed to provide an ultrafine austenite microstructure without mixed grain size. The design of rolling schedule was analyzed based on the control of the recrystallization behavior to achieve ultrafine grain size in the strip rolling process of niobium microalloyed steel. The experimental simulations were presented to validate the twice dynamic recrystallization design to achieve ultrafine grain size control.","authors":[{"authorName":"ZHU Guohui","id":"5ef0b3d9-55b3-46f2-bed8-1e5224ab2ce3","originalAuthorName":"ZHU Guohui"},{"authorName":"S V Subramanian","id":"cfc6e6d3-1a07-4295-8f24-90a3855b8ea2","originalAuthorName":"S V Subramanian"}],"categoryName":"|","doi":"","fpage":"39","id":"e8a57991-df7f-422d-8b80-c42f5a10406d","issue":"1","journal":{"abbrevTitle":"GTYJXBYWB","coverImgSrc":"journal/img/cover/GTYJXBEN.jpg","id":"1","issnPpub":"1006-706X","publisherId":"GTYJXBYWB","title":"钢铁研究学报(英文版)"},"keywords":[{"id":"6fbac10c-ad5a-427c-941b-a0f8a06f698e","keyword":"twice dynamic recrystallization;critical strain;dynamic recrystallization;ultrafine grain size","originalKeyword":"twice dynamic recrystallization;critical strain;dynamic recrystallization;ultrafine grain size"}],"language":"en","publisherId":"1006-706X_2008_1_19","title":"Recrystallization Behavior Design for Controlling Grain Size in Strip Rolling Process","volume":"15","year":"2008"}],"totalpage":302,"totalrecord":3015}