The Effects of Heat Treatment on the Microstructure and Mechanical Properties of 7050 Aluminum Alloys Containing Scandium

• Main Authors: Huan-Chih Peng, 彭煥之
• Other Authors: 邱傳聖
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/69994709790602232830

碩士 === 元智大學 === 機械工程學系 === 96 === 7000 series aluminum alloys has excellent properties in precipitation hardening. When scandium added that could modify mechanical properties. This study was to investigate the influence of precipitation hardening effect and the mechanical properties on aging treatment during the different heat treatment of 7050 aluminum alloys containing scandium. This study was divided into two parts. First parts of this study investigated the precipitation hardening effect on 7050 aluminum alloys containing scandium during aging treatment. Second part of this study discussed the mechanical properties of this alloy on aging treatment. It is proposed that the optimal aging treatment parameters were aging at 150℃ for 6h followed with 120℃ for 6 h. The microhardness was Hv285 and the ultimate tensile strength and elongation were 666MPa and 6%, respectively. The microstructure of this alloy after aging possessed uniform and fine precipitate in the matrix.