Precipitate phase transformation behavior, microstructure, and properties of Cu–Cr–Co–Si alloy. Issue 6 (30th March 2020)

• Record Type: Journal Article
• Authors: Sun, Xinglong; Jie, Jinchuan; Wang, Tongmin; Li, Tingju
• Is Part Of: Journal of materials research. Volume 35:Issue 6(2020)
• Page Start: 623
• Page End: 632
• Publication Date: 2020-03-30
• Subjects: Cu–1Cr–1Co–0.4Si alloy, -- precipitate phase transformation behavior, -- microstructure, -- yield strength, -- electrical conductivity; Materials -- Research -- Periodicals; 620.1105
• DOI: 10.1557/jmr.2020.31
• Languages: English
• ISSNs: 0884-2914

Abstract

Abstract: Abstract : In this study, precipitate phase transformation behavior, microstructure, and properties of the Cu–1Cr–1Co–0.4Si (wt%) alloy were investigated. Precipitate phase transformation kinetic equations of the alloy under room temperature rolling (RTR) 90% deformation and aging at different temperatures (440–520 °C) were established. The alloy yielded excellent mechanical and electrical properties under RTR 90% deformation and aging at 440 °C for 1 h, and the corresponding hardness, yield strength (YS), ultimate tensile strength (UTS), elongation, and electrical conductivity were 181.6 HV, 573.6 MPa, 653.7 MPa, 7.3%, and 51.6% International Annealed Copper Standard, respectively. The precipitate phase transformation behavior determined the size and volume fraction of the precipitate phase f v, which played a key role in improving the YS. Impurity scattering caused by surplus Si atoms was mainly responsible for decreasing the electrical conductivity. Therefore, these results can provide a reliable theoretical guidance to prepare Cu–Cr–based alloys with high strength and high electrical conductivity.