王同敏

个人信息Personal Information

教授

博士生导师

硕士生导师

主要任职:研究生院常务副院长

其他任职:辽宁省凝固控制与数字化制备技术重点实验室主任

性别:男

毕业院校:大连理工大学

学位:博士

所在单位:材料科学与工程学院

学科:材料加工工程

办公地点:研究生院;材料科学与工程学院

联系方式:tmwang@dlut.edu.cn

电子邮箱:tmwang@dlut.edu.cn

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Optimization of the balance between high strength and high electrical conductivity in CuCrZr alloys through two-step cryorolling and aging

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论文类型:期刊论文

发表时间:2019-01-15

发表刊物:JOURNAL OF ALLOYS AND COMPOUNDS

收录刊物:SCIE、Scopus

卷号:771

页面范围:1044-1051

ISSN号:0925-8388

关键字:Cryorolling; Precipitate; Electrical conductivity; Cu-Cr-Zr alloy

摘要:A two-step cryorolling and aging process was developed to fabricate high strength and high electrical conductivity CuCrZr alloys. The microstructural evolution, mechanical and electrical properties of Cu-1Cr-0.1Zr (wt.%) alloys subjected to the two-step cryorolling and aging process were investigated. The results showed that this two-step process reduced the width of the deformation bands from 113 nm to 80 nm. The introduction of precipitates in the matrix during intermediate aging was responsible for the narrowing of the deformation bands. Even though the cryorolled sample underwent detwinning, its ultimate tensile strength improved by similar to 35 MPa. Ordered face-centered cubic (fcc) Cr precipitates similar to 5 nm in size were observed in the Cu matrix, and these precipitates had a pinning effect on the motion of boundaries. A desired balance between the ultimate tensile strength (648 MPa) and electrical conductivity (79.80% IACS) was achieved by the coexistence of refined deformation bands, nanoscale deformation twins and nanoprecipitates. (C) 2018 Elsevier B.V. All rights reserved.