材料期刊网

{"currentpage":1,"firstResult":0,"maxresult":10,"pagecode":5,"pageindex":{"endPagecode":5,"startPagecode":1},"records":[{"abstractinfo":"The strain-rate sensitivity of ultrafine-crystalline Cu with different concentrations of nanoscale growth twins is investigated using tensile strain rate jump tests. Higher twin density leads to enhanced rate sensitivity, which decreases mildly with increasing strain rate and strain. Mechanisms underlying these effects are explored through post-deformation transmission electron microscopy. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.","authors":[],"categoryName":"|","doi":"","fpage":"319","id":"4d07deba-53b3-4f9a-92b4-dce644b12e66","issue":"4","journal":{"abbrevTitle":"SM","id":"37a994ff-74c6-4c39-a38b-4d9dcf2c8354","issnPpub":"1359-6462","publisherId":"SM","title":"Scripta Materialia"},"keywords":[{"id":"2b34b5c3-6d9b-4dfa-b2ae-e2c9375a96e1","keyword":"nanocrystalline materials;copper;nanoscale twins;pulsed;electrodeposition;strain rate sensitivity;nano-scale twins;activation volume;mechanical-properties;nanocrystalline cu;tensile properties;flow-stress;metals;copper;deformation;alloys","originalKeyword":"nanocrystalline materials;copper;nanoscale twins;pulsed;electrodeposition;strain rate sensitivity;nano-scale twins;activation volume;mechanical-properties;nanocrystalline cu;tensile properties;flow-stress;metals;copper;deformation;alloys"}],"language":"en","publisherId":"1359-6462_2006_4_2","title":"Strain rate sensitivity of Cu with nanoscale twins","volume":"55","year":"2006"},{"abstractinfo":"An ultrafine-grained Cu sample with a high density of growth twins was synthesized by means of pulsed electrodeposition technique. The strain rate sensitivity of the Cu sample was measured by strain rate cycling tests under tension. The effects of grain size as well as twin density on the strength and strain rate sensitivity were discussed.","authors":[{"authorName":"null","id":"8e9c317d-df96-4c53-8be0-028f57cb23dc","originalAuthorName":"null"},{"authorName":"null","id":"1cfee504-776d-46a1-b9ca-16c3d96953b1","originalAuthorName":"null"},{"authorName":"null","id":"fe8cbbf8-4636-4e2b-a092-dfaaa04ecf85","originalAuthorName":"null"},{"authorName":"null","id":"39bbe086-6520-4e24-92cc-f704b8efd6ef","originalAuthorName":"null"},{"authorName":"null","id":"0156b671-3c3a-486a-8963-c792248ba512","originalAuthorName":"null"},{"authorName":"null","id":"fe588f59-4084-4964-b854-57484b50dbfb","originalAuthorName":"null"}],"categoryName":"|","doi":"","fpage":"313","id":"8d52dbee-01ce-4a4e-b239-a1d15efabe1f","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":"aaa74538-6d97-4e4b-b5c5-aa6e0f085cf8","keyword":"copper","originalKeyword":"copper"},{"id":"4549d31e-2064-4801-a99d-0475e026ca53","keyword":"null","originalKeyword":"null"},{"id":"a4776009-adaf-46fb-bbdc-e603fd7e3c8c","keyword":"null","originalKeyword":"null"}],"language":"en","publisherId":"1006-7191_2006_5_2","title":"Strain rate sensitivity of ultrafine grained Cu with nanosized twins","volume":"19","year":"2006"},{"abstractinfo":"The measured hardness of nanocrystalline Cu with grain sizes (( as small as 10 nm still follows the Hall-Petch relation. A rate sensitivity of 0.06 +/- 0.01 and a flow stress activation volume of 8b(3) were determined at d = 10 nm, suggesting grain boundary activities are enhanced but not yet dominant in the plastic deformation. (c) 2006 Published by Elsevier Ltd. on behalf of Acta Materialia Inc.","authors":[],"categoryName":"|","doi":"","fpage":"1913","id":"06cbd1da-3f26-464c-b2f0-bd48bfb673c5","issue":"11","journal":{"abbrevTitle":"SM","id":"37a994ff-74c6-4c39-a38b-4d9dcf2c8354","issnPpub":"1359-6462","publisherId":"SM","title":"Scripta Materialia"},"keywords":[{"id":"940d2991-ab91-479b-9afc-e8b9bb48b878","keyword":"nanocrystalline Cu;hall-petch relation;grain size;strain rate;sensitivity;plastic-deformation;activation volume;tensile behavior;copper;metals;strength;ductility;fcc;ni;temperature","originalKeyword":"nanocrystalline Cu;hall-petch relation;grain size;strain rate;sensitivity;plastic-deformation;activation volume;tensile behavior;copper;metals;strength;ductility;fcc;ni;temperature"}],"language":"en","publisherId":"1359-6462_2006_11_1","title":"Hardness and strain rate sensitivity of nanocrystalline Cu","volume":"54","year":"2006"},{"abstractinfo":"Tensile experiment of LA41 magnesium alloy was carried out and serrated flow was apparent throughout the deformation history. This alloy exhibited abnormal strain rate sensitivity (SRS); that is, SRS was positive in the strain rate range from 1.33 x 10(-4) s(-1) to 6.66 x 10(-4) s(-1), and became negative in another range from 6.66 x 10(-4) s(-1) to 1.33 x 10(-2) s(-1). The critical strain was observed to increase with increasing strain but decrease with increasing temperature. In addition, activation energy for serrated flow was calculated and variations of SRS were explained through the competition between dynamic strain aging (DSA) of solute atoms and shearing of precipitates by dislocations. (c) 2006 Published by Elsevier B.V.","authors":[],"categoryName":"|","doi":"","fpage":"2941","id":"7f815077-a311-44dc-93d2-fed270ab811e","issue":"24","journal":{"abbrevTitle":"ML","id":"90b15a58-51fc-41ad-8509-c2692f6a3f6e","issnPpub":"0167-577X","publisherId":"ML","title":"Materials Letters"},"keywords":[{"id":"c4227ff9-7a56-4c2b-b424-2ba2751e5c61","keyword":"mechanical properties;metals and alloys;deformation and fracture;chemical diffusion-coefficients;crystals;behavior","originalKeyword":"mechanical properties;metals and alloys;deformation and fracture;chemical diffusion-coefficients;crystals;behavior"}],"language":"en","publisherId":"0167-577X_2006_24_1","title":"Serrated flow and abnormal strain rate sensitivity of a magnesium-lithium alloy","volume":"60","year":"2006"},{"abstractinfo":"We present a comprehensive computational analysis of the deformation of ultrafine crystalline pure Cu with nanoscale growth twins. This physically motivated model benefits from our experimental studies of the effects of the density of coherent nanotwins on the plastic deformation characteristics of Cu, and from post-deformation transmission electron microscopy investigations of dislocation structures in the twinned metal. The analysis accounts for high plastic anisotropy and rate sensitivity anisotropy by treating the twin boundary as an internal interface and allowing special slip geometry arrangements that involve soft and hard modes of deformation. This model correctly predicts the experimentally observed trends of the effects of twin density on flow strength, rate sensitivity of plastic flow and ductility, in addition to matching many of the quantitative details of plastic deformation reasonably well. The computational simulations also provide critical mechanistic insights into why the metal with nanoscale twins can provide the same level of yield strength, hardness and strain rate sensitivity as a nanostructured counterpart without twins (but of grain size comparable to the twin spacing of the twinned Cu). The analysis also offers some useful understanding of why the nanotwinned Qu with high strength does not lead to diminished ductility with structural refinement involving twins, whereas nanostructured Cu normally causes the ductility to be compromised at the expense of strength upon grain refinement. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.","authors":[],"categoryName":"|","doi":"","fpage":"5421","id":"97172efb-13ca-4fdf-a60d-db0ffa72b949","issue":"20","journal":{"abbrevTitle":"AM","id":"473e1d60-024a-4fd2-8f59-9e3ede87721e","issnPpub":"1359-6454","publisherId":"AM","title":"Acta Materialia"},"keywords":[{"id":"9f21a4dd-eb71-47e6-aefa-798b7a6756a3","keyword":"nanocrystalline materials;nanoscale twins;crystal plasticity;copper;computational model;ni multilayer system;single-crystals;nanocrystalline metals;localized;deformation;plastic-deformation;activation volume;cu;microstructures;simulations;patterns","originalKeyword":"nanocrystalline materials;nanoscale twins;crystal plasticity;copper;computational model;ni multilayer system;single-crystals;nanocrystalline metals;localized;deformation;plastic-deformation;activation volume;cu;microstructures;simulations;patterns"}],"language":"en","publisherId":"1359-6454_2006_20_1","title":"Strength, strain-rate sensitivity and ductility of copper with nanoscale twins","volume":"54","year":"2006"},{"abstractinfo":"Nanoindentation technique was used to measure the strain rate sensitivity (m) of a nanocrystalline Cu-Ni-P alloy prepared by means of electrodeposition. The m. value decreases from 0.034 to 0.018 when the nominal grain size increases from 7 urn to 33 nm. Both In values of the alloy are obviously lower than those of the pure Cu with similar grain size, implying that P segregation at grain boundaries might play a key role in retarding grain boundary activities as compared to pure Cu samples.","authors":[],"categoryName":"|","doi":"","fpage":"2955","id":"70bf4228-a18f-4a66-9095-a09642af3622","issue":"11","journal":{"abbrevTitle":"JOMR","id":"155c387a-c8cb-4083-85f3-6b58aeef4116","issnPpub":"0884-2914","publisherId":"JOMR","title":"Journal of Materials Research"},"keywords":[{"id":"1089ab72-7af6-47b4-92a4-6adbd3c97814","keyword":"deformation;copper;metals;fcc;temperature;mechanism;strength;behavior;creep;law","originalKeyword":"deformation;copper;metals;fcc;temperature;mechanism;strength;behavior;creep;law"}],"language":"en","publisherId":"0884-2914_2005_11_1","title":"Strain rate sensitivity of a nanocrystalline Cu-Ni-P alloy","volume":"20","year":"2005"},{"abstractinfo":"Cu-Al/Al nanostructured metallic multilayers with Al layer thickness h _Al varying from 5 to 100 nm were prepared, and their mechanical properties and deformation behaviors were studied by nanoindentation testing. The results showed that the hardness increased drastically with decreasing h _Al down to about 20 nm, whereafter the hardness reached a plateau that approaches the hardness of the alloyed Cu-Al monolithic thin films. The strain rate sensitivity (SRS, m), however, decreased monotonically with reducing h _Al. The layer thickness-dependent strengthening mechanisms were discussed, and it was revealed that the alloyed Cu-Al nanolayers dominated at h _Al ≤ 20 nm, while the crystalline Al nanolayers dominated at h _Al > 20 nm. The plastic deformation was mainly related to the ductile Al nanolayers, which was responsible for the monotonic evolution of SRS with h _Al. In addition, the h _Al-dependent hardness and SRS were quantitatively modeled in light of the strengthening mechanisms at different length scales.","authors":[{"authorName":"Ya-Qiang Wang","id":"26a0e991-b581-450b-a212-041e2f9e0bf4","originalAuthorName":"Ya-Qiang Wang"},{"authorName":" Zhao-Qi Hou","id":"a38e080d-8667-4f14-bba6-7e5050e05a82","originalAuthorName":" Zhao-Qi Hou"},{"authorName":" Jin-Yu Zhang","id":"a7ee88e0-beb0-4f8a-b4fd-32d37298b1db","originalAuthorName":" Jin-Yu Zhang"},{"authorName":" Xiao-Qing Liang","id":"9b19c52d-cfa1-46fa-acbc-6fc98ccd5001","originalAuthorName":" Xiao-Qing Liang"},{"authorName":" Gang Liu","id":"7579c19b-b5e4-4451-a5ed-2da314025c14","originalAuthorName":" Gang Liu"},{"authorName":" Guo-Jun Zhang","id":"c55f3d8c-5f1c-406f-a48e-525fec1645b3","originalAuthorName":" Guo-Jun Zhang"},{"authorName":" Jun Sun","id":"505af70c-4a6c-4787-b569-01021c713809","originalAuthorName":" Jun Sun"}],"doi":"10.1007/s40195-016-0372-7","fpage":"156","id":"a2dd57a1-9e47-42d6-b90e-62064d668983","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":"35e338e6-02e8-4ea8-b056-3e3cdefaeb30","keyword":"Nanostructured","originalKeyword":"Nanostructured"},{"id":"394000ea-15ce-49da-9f45-40d6d4d158c6","keyword":"films","originalKeyword":"films"},{"id":"bb544967-94ff-4b2c-80e1-1b2285285a82","keyword":"Cu-Al/Al","originalKeyword":"Cu-Al/Al"},{"id":"4d4a85c2-34cb-43a9-96b3-c4bb08fa1d79","keyword":"multilayers","originalKeyword":"multilayers"},{"id":"0cda3209-bf38-42e5-b2fd-5208d30f78ab","keyword":"Hardness","originalKeyword":"Hardness"},{"id":"0415a6a0-6c8a-42c2-b8c9-2026494e4ffd","keyword":"Strain","originalKeyword":"Strain"},{"id":"5880976e-539d-424b-a130-824ccfe3a6a2","keyword":"rate","originalKeyword":"rate"},{"id":"c8b3ef31-fc28-4283-8789-69ed1951842c","keyword":"sensitivity","originalKeyword":"sensitivity"},{"id":"4458100e-3cbb-4714-94ee-7637f359a1db","keyword":"Layer","originalKeyword":"Layer"},{"id":"940aad5f-035a-47bf-9d07-846a04a8eb6c","keyword":"thickness","originalKeyword":"thickness"},{"id":"5ca4c158-68fc-4c87-92f5-45dddcdda8f1","keyword":"dependence","originalKeyword":"dependence"}],"language":"en","publisherId":"2016-2-156","title":"Layer Thickness-Dependent Hardness and Strain Rate Sensitivity of Cu-Al/Al Nanostructured Multilayers","volume":"29","year":"2016"},{"abstractinfo":"The compressive and tensile strain rate sensitivities of polycrystalline and single crystal NiAl have been evaluated at 877 ℃ which is well above DBTT. Samples were prepared to specific sizes by hot press consolidation of appropriate powder sizes and minimizing past consolidation thermal exposures. NiAl single crystals were grown in the [100]orientation using a modified Bridgeman technique. The yield and tensile strength of polycrystalline NiAl as a function of grain size generally follows a Hall-Petch type relationship . A tensile strain rate effect was found at strain rate of 1 to 10-4 sec-1. The strain rate sensitivity coefficient, m,in the equation of σ = Kε is in the range of 0. 10 to 0. 13. The highest strain rate (1 sec-1) resulted in significantly higher strengths and little or no observed ductility. Compressive strain rate testing al strain rate of 10-5to 10-2 sec-1 and at temperature of 1050°to 1250°K was conducted both for polycrystalline and for single crystal NiAl. The calculated stress exponents and the activation energy for creep were compared with the reference data.","authors":[{"authorName":"HSU Shuen","id":"11a4e187-0087-4833-a388-a838d846fb91","originalAuthorName":"HSU Shuen"},{"authorName":" YANG Sycherng","id":"b1d0a979-51bc-4a05-9d8b-7e998ce6eff2","originalAuthorName":" YANG Sycherng"},{"authorName":" HON Weipirn","id":"f2fd5555-b3e4-4393-8c40-dfac2bf5ae48","originalAuthorName":" HON Weipirn"},{"authorName":" WANG Chienyi LEE Tsangsheau (Chung-Shan Institute of Science and Technology","id":"33b5ef44-1cc1-439e-be73-8cdf9a578af2","originalAuthorName":" WANG Chienyi LEE Tsangsheau (Chung-Shan Institute of Science and Technology"},{"authorName":" Lung-Tan","id":"8066bef8-14c6-4882-934b-238541d8138d","originalAuthorName":" Lung-Tan"},{"authorName":" Taiwan","id":"23692522-ed0e-4223-a7bf-b5bbacee11c8","originalAuthorName":" Taiwan"},{"authorName":"China) HSU Ichung(National Taiwan University","id":"64ef5d1f-e2d5-400d-8638-37b8f3048a9e","originalAuthorName":"China) HSU Ichung(National Taiwan University"},{"authorName":" Taipei","id":"8c0a46b6-93ec-4d7a-8781-95a117920756","originalAuthorName":" Taipei"},{"authorName":" Taiwan","id":"fe0da175-651f-4daa-ad01-1dfb5012dcef","originalAuthorName":" Taiwan"},{"authorName":" China) CHIN Stephen","id":"47200a76-b533-4c89-8ab5-bd0f092dc39e","originalAuthorName":" China) CHIN Stephen"},{"authorName":" ANTON Donald L.(United Technologies Research Center","id":"9fdb8b7d-6ff4-4387-bcdd-afa2535778a1","originalAuthorName":" ANTON Donald L.(United Technologies Research Center"},{"authorName":" East Hartford. CT","id":"77b48c78-c529-4de8-92f2-9eb60a53b5c0","originalAuthorName":" East Hartford. CT"},{"authorName":" USA)","id":"12caa95d-7bdd-48db-800a-ae4391250c0d","originalAuthorName":" USA)"}],"categoryName":"|","doi":"","fpage":"543","id":"00e1d132-36fb-4243-abb6-c454dda0222c","issue":"z1","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":"8a5003cc-f3aa-4040-ae01-682c99fd8c08","keyword":":strain rate sensitivity polycrystalline NiAl","originalKeyword":":strain rate sensitivity polycrystalline NiAl"},{"id":"3e1a97fa-8251-4c33-95e2-72e1d3562731","keyword":"null","originalKeyword":"null"}],"language":"en","publisherId":"1006-7191_1995_z1_35","title":"STRAIN RATE SENSITIVTTY OF POLYCRYSTALLINE AND SINGLE CRYSTAL NiAl","volume":"8","year":"1995"},{"abstractinfo":"The process of dislocation multiplication has been described hv chaos theory, trying to reveal the connection between the microstructures on the mesoscopic scale and the mechanical properties of material on the macroscopic scale. The relationship between the dislocation velocity exponent and the maximum of strain rate is given. The results obtained from logistic equation with exponent and the dislocation multiplication dynamic equation are compared. A scale law in one-dimension-map model with exponent is shown when the exponents of equations are changed.","authors":[],"categoryName":"|","doi":"","fpage":"363","id":"5e5bc4af-8fdd-4358-ade3-9b42b982c160","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":"114edd8b-f919-4383-989a-532477d4671f","keyword":"simulation;dynamics;model;crystals;silicon;metals","originalKeyword":"simulation;dynamics;model;crystals;silicon;metals"}],"language":"en","publisherId":"1005-0302_2001_3_2","title":"Dislocation velocity exponent and the strain rate","volume":"17","year":"2001"},{"abstractinfo":"The process of dislocation multiplication has been described hv chaos theory, trying to reveal the connection between the microstructures on the mesoscopic scale and the mechanical properties of material on the macroscopic scale. The relationship between the dislocation velocity exponent and the maximum of strain rate is given. The results obtained from logistic equation with exponent and the dislocation multiplication dynamic equation are compared. A scale law in one-dimension-map model with exponent is shown when the exponents of equations are changed.","authors":[{"authorName":"Hongyan LIU","id":"db0b2eb9-f77e-489d-ab0f-9c06d421b43f","originalAuthorName":"Hongyan LIU"},{"authorName":" Xiaowei WANG","id":"1cad7ae9-47a5-40ce-ad1a-dde14cdfc8ff","originalAuthorName":" Xiaowei WANG"}],"categoryName":"|","doi":"","fpage":"363","id":"b10a5155-f3f0-4ded-ac4c-0710be476afe","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":[],"language":"en","publisherId":"1005-0302_2001_3_13","title":"Dislocation velocity exponent and the strain rate","volume":"17","year":"2001"}],"totalpage":303,"totalrecord":3024}