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个人信息Personal Information
教授
博士生导师
硕士生导师
任职 : 中国体视学会材料科学分会理事;中国体视学会金相分会理事
性别:男
毕业院校:东北大学
学位:博士
所在单位:材料科学与工程学院
学科:材料学
办公地点:新三束实验室(4号楼)305
联系方式:13390512391
电子邮箱:wynmm@dlut.edu.cn
An examination of surface stress effects and deformation mechanisms in Al-Cu nanowires
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论文类型:期刊论文
发表时间:2008-06-01
发表刊物:MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING
收录刊物:SCIE、EI
卷号:16
期号:4
ISSN号:0965-0393
摘要:A molecular dynamics simulation was utilized to study AlCu and AlCu(3) nanowires. The simulation results showed that surface stress can force AlCu nanowires into high-elastic states and induce slip and clusters in AlCu(3) nanowires. Two distinct types of deformation mechanisms were observed. One is that the AlCu nanowires underwent the changes of elastic deformation, amorphous transition, necking and breaking. The other is because the {1 0 1} twinning and crystal region coexist, the calculated tensile curves of AlCu(3) nanowires also show many yield points, and unloading can lead to elastic recovery of 4-9%. It implies that AlCu(3) nanowires are usable even after external shock waves. This work indicates that changing atomic proportions in alloy nanowires can be utilized to control the deformation mechanism upon loading.