Effects of extrusion on chromium precipitation in Cu-Cr alloy

来源期刊：中国有色金属学报(英文版)2003年第2期

论文作者：范志康 杨红旺 梁淑华 肖鹏

文章页码：267 - 270

Key words：Cu-Cr alloy; chromium precipitation; extrusion

Abstract: Cu-Cr alloys containing Cr from 0.14% to 2.0% in mass were prepared as foils for TEM observation before and after being extruded. The results show that before extrusion, the spheroid or short bar chromium disperse in copper matrix of the Cu-Cr alloy, and the relationship between Cu and Cr follows the Nishiyama-Wasserman (NW) relationship, i.e. ［110］_Cu∥［001］_Cr. After the Cu-Cr alloy was extruded at 860℃, dark field image along (224)_Cu clearly shows that there are precipitated chromium particles in copper matrix. However, the SADP comprises only (112)_Cu zone.