Microstructural evolution and properties of a Cu-Cr-Ag alloy during continuous manufacturing process

• 作者: Gao-Lei Xu Li-Jun Peng Guo-Jie Huang Hao-Feng Xie Zhen Yang Xue Feng Xiang-Qian Yin Xu-Jun Mi
• 来源期刊: 稀有金属（英文版）
• 年，卷（期）: 2021,（8）
• 所属期刊栏目: ORIGINAL ARTICLES
• 页码范围: 2213-2220
• 页数: 8页
• 语种: 英文

摘要

Microstructure evolution and properties of a Cu-Cr-Ag alloy during the continuous manufacturing process were investigated in detail by scanning electron micro-scopy (SEM) and transmission electron microscopy (TEM)in the study.The Cu-Cr-Ag alloy rod with uniform com-positions is fabricated by upward continuous casting technology.Few of the Cr phases are observed in the as-cast alloy.During the continuous extrusion process,the severe shear deformation and the dynamic aging occur.The average grain size of as-extruded alloy is much smaller than that of as-cast alloy.Both fcc and bcc Cr precipitates appear in the matrix.The interaction mode between dis-locations and precipitates can be identified as Orowan bypass mode according to the TEM observations.The overall difference in the yield strength between as-cast and as-extruded Cu-Cr-Ag alloy is attributed to solid solution strengthening,grain refinement strengthening,precipitation hardening and working hardening.