{"currentpage":1,"firstResult":0,"maxresult":10,"pagecode":5,"pageindex":{"endPagecode":5,"startPagecode":1},"records":[{"abstractinfo":"在1173—1323K温度范围内研究了Ni-20Cr合金蠕变行为与位错亚结构的关系.在蠕变初期出现蠕变速率几乎不变的亚稳态阶段.电镜观察表明,亚稳态蠕变和未形成亚晶的均匀位错结构相对应.亚稳态到稳态的蠕变速率连续降低的过渡阶段是蠕变中形成的亚晶界逐渐取代晶界起位错攀移相消位置的结果. 提出了控制稳态蠕变速率的亚结构参数是亚晶界位错网目尺寸,蠕变速率可用ε=αρtbV_c/h表示.根据位错在晶界或亚晶界上攀移相消控制的蠕变机制讨论了固溶碳和晶界碳化物对蠕变行为的影响.","authors":[{"authorName":"张俊善","id":"2bf1e55a-8e64-46a3-8111-d73bfb7687aa","originalAuthorName":"张俊善"},{"authorName":"曹智本","id":"97d7e8eb-d9cb-4171-873d-c2f2a08712cb","originalAuthorName":"曹智本"}],"categoryName":"|","doi":"","fpage":"111","id":"8e494d87-8c3a-4336-85bd-684fb512b69a","issue":"2","journal":{"abbrevTitle":"JSXB","coverImgSrc":"journal/img/cover/JSXB.jpg","id":"48","issnPpub":"0412-1961","publisherId":"JSXB","title":"金属学报"},"keywords":[{"id":"4c05e289-7448-4be5-b510-e5e52a49c810","keyword":"亚稳态","originalKeyword":"亚稳态"},{"id":"d93721dd-3886-49fa-a186-113bdaa9796c","keyword":"substructure","originalKeyword":"substructure"},{"id":"5e90cf1e-7a44-48a4-b227-17c8d3724604","keyword":"<span style=\"color:red\">subboundary</span> <span style=\"color:red\">mesh</span> <span style=\"color:red\">size</span>","originalKeyword":"subboundary mesh size"},{"id":"9bb5c451-8b7b-483d-ac70-6d651bfaaed6","keyword":"subgrain misorientation","originalKeyword":"subgrain misorientation"},{"id":"e37ec876-d226-414b-b68c-e2833b96dae1","keyword":"dislocation annihilation","originalKeyword":"dislocation annihilation"}],"language":"zh","publisherId":"0412-1961_1988_2_18","title":"Ni-20Cr合金高温蠕变行为与位错亚结构的关系","volume":"24","year":"1988"},{"abstractinfo":"In order to improve the prediction accuracy of macrosegregation channel, an algorithm for dynamic remeshing is proposed. The basic idea is to generate fine elements near the liquidus isotherm. The norm of the gradient of solid fraction is used for piloting the remeshing in the mushy zone; whereas, the objective <span style=\"color:red\">mesh</span> <span style=\"color:red\">size</span> in the liquid is considered as a function of the distance to the liquidus isotherm. The efficiency of <span style=\"color:red\">mesh</span> adaptation is demonstrated by prediction of macrosegregation channel in a case of unidirectional solidification.","authors":[{"authorName":"Weitao LIU","id":"b663da7d-b7f1-444f-8a82-54bc4f1eef3f","originalAuthorName":"Weitao LIU"},{"authorName":"Changchuan XIE","id":"533562a5-3221-4b3a-93ec-f85c6c357ca4","originalAuthorName":"Changchuan XIE"},{"authorName":"Michel Bellet","id":"7c21d212-ea4b-4013-84c9-969e013c6bfb","originalAuthorName":"Michel Bellet"},{"authorName":"Herve","id":"37d882fa-7ae6-48d0-8a89-d7b8f6168c0a","originalAuthorName":"Herve"}],"categoryName":"|","doi":"10.1016/S1006-7191(08)60094-0","fpage":"233","id":"b13fbe09-6bb4-4744-8a62-3347438f645a","issue":"3","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":"813944f8-a1fb-458f-9296-674792539834","keyword":"Freckle","originalKeyword":"Freckle"},{"id":"3fd92080-3c39-48e3-8386-d8582188ead1","keyword":"null","originalKeyword":"null"},{"id":"e83bb84e-fe9e-4bde-932d-6c36104a38ff","keyword":"null","originalKeyword":"null"},{"id":"8d3cecb7-e903-41fb-8ac2-9bc16c5eab9f","keyword":"null","originalKeyword":"null"}],"language":"en","publisherId":"1006-7191_2009_3_3","title":"2-Dimensional FEM modeling of macrosegregation in the directional solidification with <span style=\"color:red\">mesh</span> adaptation","volume":"22","year":"2009"},{"abstractinfo":"This paper focuses on the compression fatigue behavior of Ti-6Al-4V <span style=\"color:red\">mesh</span> arrays with high porosities of similar to 60-85%, which were fabricated by an additive manufacturing technique using electron beam melting. The results show that their fatigue lives are mainly determined by uniform deformation through the entire specimens, while their failures are characterized by rapid strain accumulation and a severe crush band at an angle of 45 degrees to the cyclic loading direction. The relation between the relative fatigue strength and relative density can be evaluated by the well-known Gibson-Ashby model with the exponential factor n being 2.7, which is higher than the reported data for aluminum and nickel foams, and almost double the idealized value (n = 1.5) of a stochastic open cellular foam. The underlying mechanism of fatigue failure appears to be interaction between cyclic ratcheting and fatigue crack initiation and propagation, while the former plays a dominant role in fatigue life. TEM observations found that dislocations are generated along the interface of the alpha' phase and their generation becomes more evident with an increase in the relative density. This would contribute to the retardation of cyclic ratcheting and an improvement in the fatigue strength. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.","authors":[],"categoryName":"|","doi":"","fpage":"793","id":"8cf91a50-2326-4ba5-ac8e-a4c71ab6cdd5","issue":"3","journal":{"abbrevTitle":"AM","id":"473e1d60-024a-4fd2-8f59-9e3ede87721e","issnPpub":"1359-6454","publisherId":"AM","title":"Acta Materialia"},"keywords":[{"id":"4b7be4d6-0be8-4515-b29b-f8825df124e5","keyword":"Electron beam melting;Titanium alloys;<span style=\"color:red\">Mesh</span> arrays;Fatigue;cyclic creep acceleration;aluminum-alloy foams;ambient-temperature;crack propagation;single-crystals;cellular metals;heat-treatment;stress;copper;mechanisms","originalKeyword":"Electron beam melting;Titanium alloys;Mesh arrays;Fatigue;cyclic creep acceleration;aluminum-alloy foams;ambient-temperature;crack propagation;single-crystals;cellular metals;heat-treatment;stress;copper;mechanisms"}],"language":"en","publisherId":"1359-6454_2012_3_3","title":"Compression fatigue behavior of Ti-6Al-4V <span style=\"color:red\">mesh</span> arrays fabricated by electron beam melting","volume":"60","year":"2012"},{"abstractinfo":"在580℃和1.5 MPa的条件下用热压烧结的方法制备出了一系列Al2O3/Al-steel <span style=\"color:red\">mesh</span>-Al层状复合材料,该复合材料是由两层铝箔和一层丝网构成的“sandwich”结构,Al-steel <span style=\"color:red\">mesh</span>-Al为中间夹层.结果显示,Al2O3/Al的界面粘结紧密并且没有反应发生.在Al/steel的界面处出现了金属间化合物,该化合物改善了Al与丝网之间的结合性能.相比于纯Al2O3,Al2O3/Al-steel <span style=\"color:red\">mesh</span>-Al层状复合材料强度差别不大,但具有更高的断裂韧性和断裂功.裂纹扩展分析认为层状复合材料断裂韧性和断裂功的提高得益于裂纹钝化和捕获,界面分离,裂纹桥接和Al-steel <span style=\"color:red\">mesh</span>-Al的塑性变形等机制.落锤冲击结果表明,Al2O3/Al-steel <span style=\"color:red\">mesh</span>-Al层状复合材料具有较好的抗冲击性能.","authors":[{"authorName":"白明敏","id":"08f9ea7c-1140-4c7b-88e3-498e46e0701f","originalAuthorName":"白明敏"},{"authorName":"李伟信","id":"9866fc91-f308-4df9-9823-490f5642c6f8","originalAuthorName":"李伟信"},{"authorName":"李艳辉","id":"1c55e8c8-c4e6-4891-ab52-71d6d4590892","originalAuthorName":"李艳辉"},{"authorName":"赵威","id":"978473d4-cb9c-4ad7-978d-065491febb59","originalAuthorName":"赵威"},{"authorName":"饶平根","id":"cdacca32-2747-4af9-be00-f0d8b3312432","originalAuthorName":"饶平根"}],"doi":"10.15541/jim20140410","fpage":"1339","id":"7ca2c963-e226-4ff0-bee4-17fb83f4356b","issue":"12","journal":{"abbrevTitle":"WJCLXB","coverImgSrc":"journal/img/cover/WJCLXB.jpg","id":"62","issnPpub":"1000-324X","publisherId":"WJCLXB","title":"无机材料学报"},"keywords":[{"id":"5c06d954-08f1-4b95-bbb9-598222fd9d1b","keyword":"氧化铝","originalKeyword":"氧化铝"},{"id":"01494c56-669b-4840-b590-739ef592d7b7","keyword":"Al-丝网","originalKeyword":"Al-丝网"},{"id":"4ef324ea-f241-4152-99a0-7a1c2312a49d","keyword":"热压烧结","originalKeyword":"热压烧结"},{"id":"1fb01da8-b506-4255-a518-e15f05311acf","keyword":"层状复合材料","originalKeyword":"层状复合材料"},{"id":"72748654-060c-4422-a58c-c04a36a6cb2a","keyword":"力学性能","originalKeyword":"力学性能"},{"id":"51269642-80aa-4b3a-91ac-fb61fd0e3739","keyword":"落锤冲击","originalKeyword":"落锤冲击"}],"language":"zh","publisherId":"wjclxb201412018","title":"热压烧结Al2O3/Al-steel <span style=\"color:red\">Mesh</span>-Al层状复合材料的制备和性能","volume":"29","year":"2014"},{"abstractinfo":"A series of simple models for different bulk and <span style=\"color:red\">size</span>-dependent interface energies are introduced. In particular a special emphasis on the <span style=\"color:red\">size</span> dependence of interface energy is carried out. The established models without free parameters are in agreement with the experimental or other theoretical results.","authors":[{"authorName":"Qing JIANG","id":"b4cda7db-3ee7-4f4c-99f8-a3ac1f22d63e","originalAuthorName":"Qing JIANG"},{"authorName":" Haiming LU","id":"18705d29-5e51-4370-97d3-f92075fdeede","originalAuthorName":" Haiming LU"},{"authorName":"null","id":"efe103d6-8ef0-4dab-8a46-88ab3c2daec7","originalAuthorName":"null"},{"authorName":"null","id":"b106f422-86bf-4a32-96d9-8d67c0a1fc9c","originalAuthorName":"null"}],"categoryName":"|","doi":"","fpage":"0","id":"a4d6540b-2a1e-4c46-84ca-22da75117586","issue":"Supl.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":"9e399d4a-eccf-4e3f-b474-79e12568750d","keyword":"Interface energy","originalKeyword":"Interface energy"},{"id":"b0cade58-40a3-445b-88b6-d718591c1c1e","keyword":"null","originalKeyword":"null"}],"language":"en","publisherId":"1005-0302_2005_Supl.1_7","title":"<span style=\"color:red\">Size</span>-dependent Interface Energies","volume":"21","year":"2005"},{"abstractinfo":"The granule <span style=\"color:red\">size</span> distribution and the porosity of the granule packing process were researched. For realizing the optimizing control of the whole sintering production process, researchers must know the factors influencing the granule <span style=\"color:red\">size</span> distribution and the porosity. Therefore, tests were carried out in the laboratory with regard to the influences of the <span style=\"color:red\">size</span> and <span style=\"color:red\">size</span> distribution of raw materials and the total moisture content on the <span style=\"color:red\">size</span> and <span style=\"color:red\">size</span> distribution of granule. Moreover, tests for finding out the influences of the moisture content and the granule volume fraction on the porosity were also carried out. The results show that (1) the raw material has little influence on granulation when its <span style=\"color:red\">size</span> is in the range of 051 mm to 10 mm; (2) the influence of the material <span style=\"color:red\">size</span> on granule <span style=\"color:red\">size</span> plays a dominant role, and in contrast, the moisture content creates a minor effect on granule <span style=\"color:red\">size</span>; (3) in binary packing system, with the increase in the constituent volume fraction, the porosity initially increases and then decreases, and there is a minimum value on the porosity curve of the binary mixture system; (4) the minimum value of the porosity in binary packing system occurs at different locations for different moisture contents, and this value shifts from right to left on the porosity curve with increasing the moisture content; (5) the addition of small granules to the same <span style=\"color:red\">size</span> component cannot create a significant influence on the porosity, whereas the addition of large granules to the same system can greatly change the porosity.","authors":[{"authorName":"DAI Shuhua","id":"64a4de28-5522-49db-b370-dbb76e5111c6","originalAuthorName":"DAI Shuhua"},{"authorName":"SHEN Fengman","id":"38bd7b25-6258-433e-8d7f-6932cf8800f7","originalAuthorName":"SHEN Fengman"},{"authorName":"YU Aibing","id":"2fb5ee90-21e1-433a-afbc-fb41dda3c30c","originalAuthorName":"YU Aibing"}],"categoryName":"|","doi":"","fpage":"1","id":"8488b32f-0b87-459b-bc64-20c2a683f30a","issue":"5","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":"be3c3a14-fda7-46de-a334-7ad82881211b","keyword":"granule;raw material;<span style=\"color:red\">size</span> distribution;granulation;granule packing;porosity","originalKeyword":"granule;raw material;size distribution;granulation;granule packing;porosity"}],"language":"en","publisherId":"1006-706X_2008_5_10","title":"Granule <span style=\"color:red\">Size</span> Distribution and Porosity of Granule Packing","volume":"15","year":"2008"},{"abstractinfo":"The available experimental results have been summarized concerning the effect of grain <span style=\"color:red\">size</span> on minimum creep rate.There are two types of creep rate-grain <span style=\"color:red\">size</span> relations.One is that there is a criti- cal grain <span style=\"color:red\">size</span> above which creep rate is independent of grain <span style=\"color:red\">size</span>,below which creep rate increases with the decrease of grain <span style=\"color:red\">size</span>.The other is that there is an intermediate grain <span style=\"color:red\">size</span> 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 <span style=\"color:red\">size</span> relations,the increase of the creep rates with the de- crease of grain <span style=\"color:red\">size</span> 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 <span style=\"color:red\">size</span>","originalKeyword":"grain size"},{"id":"e5abcdfc-2374-49d6-9672-f9facd6c3650","keyword":"null","originalKeyword":"null"}],"language":"en","publisherId":"1005-0302_1992_2_1","title":"On Grain <span style=\"color:red\">Size</span> Dependence of Minimum Creep Rate","volume":"8","year":"1992"},{"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-<span style=\"color:red\">size</span> limit of polycrystalline materials was proposed. The grain-<span style=\"color:red\">size</span> 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-<span style=\"color:red\">size</span> limit of polycrystalline materials","volume":"59","year":"1999"},{"abstractinfo":"The effect of electric current pulses (ECP) on grain <span style=\"color:red\">size</span> in castings is considered. The relationship between grain <span style=\"color:red\">size</span> 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 <span style=\"color:red\">size</span> 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 <span style=\"color:red\">size</span>;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 <span style=\"color:red\">size</span> in castings","volume":"11","year":"1998"},{"abstractinfo":"The ferroelectric domain structures in a two-dimensional square lattice with different lattice sizes under a set of finite boundary conditions (zero dipole and clamped strain on lattice boundaries) are investigated using Monte Carlo simulation, based on the Landau phenomenological model. Given the finite boundary conditions, the ferroelectric domain structure evolves gradually from the 90 degrees-striped pattern into the single-vortex pattern with reducing lattice <span style=\"color:red\">size</span>. When the finite boundary conditions apply only onto one-dimensional boundaries, as an approach to the case of thin films, the single-domain pattern is favored with reducing lattice <span style=\"color:red\">size</span>. The physics underlying the evolution of domain structures with varying lattice <span style=\"color:red\">size</span> is discussed.","authors":[],"categoryName":"|","doi":"","fpage":"","id":"ab8bb32b-88b3-476c-8096-dbe28e74b49f","issue":"11","journal":{"abbrevTitle":"JOAP","id":"7dcf8a89-0513-40ee-be2d-759941dcef7e","issnPpub":"0021-8979","publisherId":"JOAP","title":"Journal of Applied Physics"},"keywords":[{"id":"b06fe7e4-01d8-4932-bdcd-93df83b7909c","keyword":"electric domains;Monte Carlo methods;nanostructured materials;<span style=\"color:red\">size</span>;effect;phase-transitions;thin-films;surface;polarization","originalKeyword":"electric domains;Monte Carlo methods;nanostructured materials;size;effect;phase-transitions;thin-films;surface;polarization"}],"language":"en","publisherId":"0021-8979_2009_11_1","title":"Monte Carlo simulation on the <span style=\"color:red\">size</span> effect in ferroelectric nanostructures","volume":"106","year":"2009"}],"totalpage":186,"totalrecord":1852}