共查询到11条相似文献，搜索用时 46 毫秒
1.
SUN Dalin LEI Yongquan CHEN Yanglin WU Jing WANG Qidong Zhejiang University Hangzhou China Department of Materials Science Engineering Zhejiang University Hangzhou China 《金属学报(英文版)》1993,6(2):136-139
After 290 h electrochemical charging of deuterium,the density of dislocation in well-annealedPd was increased from 10~8/cm~2 to over 10~12/cm~2 and a large amount of bubble-like voidsor cracks was observed by optical and transmission electron microscopes.The mechanism ofdeuterium cracking is believed due to the formation of molecular De during the segregstionand combination of deuterium atoms around dislocations.XRD results showed that the latticeconstant of Pd increased from 0.3890 nm to 0.4034 nm. 相似文献
2.
Z.J. Han L. Liu M. Lind L. Holappa 《金属学报(英文版)》2006,19(1):1-8
The basic mechanism and kinetics of the transformation process of alumina inclusions in steel was reported when calcium introduced into the steel by wire feeding orpowder injection. To clarify the mechanisms model, experiments were performed by studying reactions between AltOs and CaO in a laboratory furnace and by performing calcium treatments in an 8kg induction furnace for Al deoxidised melt. The phases formed during the reaction between Al2O3 and CaO were examined by SEM-EDS （scanning electron microscope-energy dispersive spectrometer）, and the reaction sequence of Al2O3=〉 CA6=〉 CA2 =〉 CA =〉 CAx（l） was discussed in term of the experimental observations. The kinetics of the reaction of calcium with alumina inclusions were simulated by immersing alumina plates in a Ca treated steel melt in the induction furnace. Results were compared with observations of real inclusion transformation. A kinetic model was proposed based on the results. 相似文献
3.
实验结果表明,硼在γ—Fe中的扩散系数相当于间隙原子的扩散系数,故一般认为硼是以间隙方式扩散,但本文计算结果表明:硼在γ—Fe中,主要是以硼—空位复合体方式扩散,其扩散系数与实验值非常接近,而且γ—Fe/B晶界的非平衡偏聚和Fe—B系晶格常数测量结果支持了本文的观点。 相似文献
4.
MECHANISM FOR DIFFUSION OF BORON IN γ-Fe 总被引：1，自引：0，他引：1
YU Zongsen CHEN Ning University of Science Technology Beijing Beijing China 《金属学报(英文版)》1992,5(5):318-323
Mechanism for diffusion of B in γ-Fe is believed to be mainly by means of boron-vacancycomplexes other than as interstitial atoms previously.This was made of calculation on the ba-sis of theoretical model proposed by the authors.The calculated diffusion coefficient of B inγ-Fe after this mechanism is consistent with the experimental values.In addition,this is alsosupported by the non-equilibrium segregation phenomenon of B at grain boundaries of γ-Feand the lattice constant measurement of Fe-B alloy. 相似文献
5.
Wang Fusheng Zhou Zaiming Liang Ronghai Central-South University of Technology Changsha China 《中国有色金属学会会刊》1993,(3)
The infiltration mechanism, which has great significance for the quality control of electrieal contact material made from W-Cu, W-Ag alloys with high content of tungsten, has been studied. And a directive infiltration technology for improving the product quality and gaining a better economic benefit has been developed. 相似文献
6.
SUN Dongli YANG Dezhuang LEI Tingquan CUI Yuexian Harbin Institute of Technology Harbin China Lecturer Department of Metallic Materials Technology Harbin Institute of Technology Harbin China 《金属学报(英文版)》1990,3(5):357-363
The fracture mechanism of deformation-aged Al-Li alloy was approached by investigatingthe influence of prior cold deformation on the precipitation kinetics as well as the behavioursof work hardening and fracture for Al-2.73Li alloy.The experimental results show that thework hardening rate and the strength are increased and the ductility is decreased by prior colddeformation.The decrease in ductility is mainly due to the cell dislocaton substructure distrib-uted inhomogeneously and the hardening of precipitate free zones at grain boundaries causedby prior cold deformation.The failure mode in the alloy is a mixed integranular andtransgranular one.The tendency of intergranular fracture is intensified through thedeformation-aging.The mechanisms of intergranular failure in the alloy are different undervarious deformation-aging treatments. 相似文献
7.
Wu Ying Liang Wei Cui Yuexian Li Daoming Yang Dezhuang School of Materials Science Engineering Harbin Institute of Technology Harbin 《中国有色金属学会会刊》1997,(2)
ＥＦＦＥＣＴＯＦＴＥＳＴＴＥＭＰＥＲＡＴＵＲＥＯＮＤＥＦＯＲＭＡＴＩＯＮＭＥＣＨＡＮＩＳＭＯＦＴｉ３ＡｌＮｂＡＬＬＯＹ①ＷｕＹｉｎｇ，ＬｉａｎｇＷｅｉ，ＣｕｉＹｕｅｘｉａｎ，ＬｉＤａｏｍｉｎｇ，ＹａｎｇＤｅｚｈｕａｎｇＳｃｈｏｏｌｏｆＭａｔｅｒｉａ... 相似文献
8.
1.IntroductionTheAl-Ti-BmasteralloyshavehadanincreasinglyimportantindustrialapplicationforthegrainrefinementofcommerciallypureAl,buttheprecisemechanismsarenotclearlyestablished.ThemechanismsofgrainrefinementbytheadditionofTiandBcanbemainlysummarizedasthe"peritecticreaction"theory[1,2],"boride"theory[3--5]and"duplex"nucleationmechanis.[6].Detaileddiscussionofthesetheoriesisbeyondthescopeofthepresentpaper.Onlythemainviewpointsofthetheorieswillbedealtwithhere.CrossleyandMondolfo[1]presentedth… 相似文献
9.
Tan Guanzheng Institute of Robotics Central South University of Technology Changsha Zhu Jianying Department of Mechanical Engineering Nanjing University of Aeronautics Astronautics Nanjing 《中国有色金属学会会刊》1997,(1)
ＡＮＥＷＭＥＴＨＯＤＯＦＭＥＣＨＡＮＩＳＭＳＹＮＴＨＥＳＩＳＦＯＲＢＩＰＥＤＲＯＢＯＴＳ①ＴａｎＧｕａｎｚｈｅｎｇＩｎｓｔｉｔｕｔｅｏｆＲｏｂｏｔｉｃｓ，ＣｅｎｔｒａｌＳｏｕｔｈＵｎｉｖｅｒｓｉｔｙｏｆＴｅｃｈｎｏｌｏｇｙ，Ｃｈａｎｇｓｈａ４１００８... 相似文献
10.
Xu Guoyuan Gu Desheng College of Resources Environment Civil Engineering Central South University of Technology Changsha P. R. China 《中国有色金属学会会刊》1999,9(2)
１ＩＮＴＲＯＤＵＣＴＩＯＮＥｘｐｌｏｓｉｖｅｓｔｒｅｓｓｗａｖｅｓａｒｅｑｕｉｔｅｉｍｐｏｒｔａｎｔｉｎｒｏｃｋｆｒａｇｍｅｎｔａｔｉｏｎｐｒｏｃｅｓ．Ｍａｎｙｓｃｈｏｌａｒｓｈａｖｅｉｎｖｅｓｔｉｇａｔｅｄｔｈｅｇｅｎｅｒａｔｉｏｎａｎｄｐｒｏｐａ... 相似文献
11.
稀土元素在金属材料中的作用与机理 总被引：45，自引：4，他引：45
杜挺 《中国有色金属学报》1996,6(2):13-18
该文作者从１９６１年开始进行稀土元素在铁基、镍基、铜基、铝基等约百个２～４元金属溶液体系的热力学、相平衡及在２０多个金属材料（包括稀土－铁超磁致伸缩材料）中的作用与应用研究，该文依据作者所在科研组的研究成果并参考一些文献，说明了稀土元素在金属材料中的作用和机理 相似文献