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Repetition bend properties of Cu-Cr and Cu-Cr-Sn alloys |
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| Authors: | Toshimi Yamane Masatoshi Yasunaga Keiichi Hirao Shinsuke Yamasaki Keizo Kazama Kosei Yoshida Rikio Takeda Minoru Hiratani |
| Affiliation: | (1) Department of Materials Science and Engineering, Faculty of Engineering, Osaka University, Yamadaoka, Suita, 565 Osaka, Japan;(2) Central Research Laboratory, Sumitomo Metal Mining Co. Ltd, 18-15 3-chome, Nakakokubun, 272 Ichikawa, Japan;(3) Sumitomo Metal Mining Copper and Brass Sales Co. Ltd, Shinaoyama West Building, no. 1156, 1-chome, minamiaoyama, Minatoku, 107 Tokyo, Japan |
| Abstract: | Repetition numbers of bending of Cu-0.81 wt% Cr, Cu-0.81 wt% Cr-0.14 wt% Sn and Cu-0.26 wt% Cr-0.10 wt% Sn alloys were investigated. After solution treatment, the first two types of copper alloys have a primary chromium phase; this is not so in the last alloy. The primary chromium phase does not influence the repetition numbers of bending of cold-rolled specimens; the repetition numbers of bending of specimens aged at 723 K for 1.8 × 103 sec after cold rolling are higher than those of cold-rolled specimens. The cause of this is considered to be a recovery of work-hardening during ageing. |
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