Materials | |
Microstructure Evolution in Cu-Ni-Co-Si-Cr Alloy During Hot Compression by Ce Addition | |
Xu Li1  Yanlin Jia2  Alex.A. Volinsky3  Kexing Song4  Baohong Tian4  Meng Zhou4  YiJie Ban4  Yong Liu4  Yi Zhang4  | |
[1] Center for Advanced Measurement Science, National Institute of Metrology, Beijing 100029, China;College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China;Department of Mechanical Engineering, University of South Florida, Tampa, FL 33620, USA;School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, China; | |
关键词: Cu-Ni-Co-Si-Cr-(Ce) alloys; hot deformation; microstructure evolution; electron backscattered diffraction (EBSD); processing map; | |
DOI : 10.3390/ma13143186 | |
来源: DOAJ |
【 摘 要 】
Cu-Ni-Si alloys are widely used in lead frames and vacuum devices due to their high electrical conductivity and strength. In this paper, a Cu-Ni-Co-Si-Cr-(Ce) alloy was prepared by vacuum induction melting. Hot compression tests of the Cu-Ni-Co-Si-Cr and Cu-Ni-Co-Si-Cr-Ce alloys were carried out using a Gleeble-1500 simulator at 500–900 °C deformation temperatures and 0.001–10 s−1 strain rates. The texture change was analyzed by electron backscatter diffraction. The <110> fiber component dominated the texture after compression, and the texture intensity was reduced during recrystallization. Moreover, the average misorientation angle j for Cu-Ni-Co-Si-Cr-Ce (11°) was lower than that of Cu-Ni-Co-Si-Cr (16°) under the same conditions. Processing maps were developed to determine the optimal processing window. The microstructure and precipitates of the Cu-Ni-Co-Si-Cr and Cu-Ni-Co-Si-Cr-Ce alloys were also analyzed. The average grain size of the Cu-Ni-Co-Si-Cr-Ce alloy (48 μm) was finer than that of the Cu-Ni-Co-Si-Cr alloy (80 μm). The average size of precipitates in the Cu-Ni-Co-Si-Cr alloy was 73 nm, while that of the Cu-Ni-Co-Si-Cr-Ce alloy was 27 nm. The addition of Ce delayed the occurrence of dynamic recrystallization.
【 授权许可】
Unknown