Effects of pre-aging at elevated temperature and natural aging on the bake hardenability of Al-Mg-Si alloy

被引：4
作者：
Hatta, Hidenori [1 ]
Matsuda, Shinichi [1 ]
Tanaka, Hiroki [1 ]
Yoshida, Hideo [1 ]
机构：
[1] Research and Development Center, Sumitomo Light Metal Industries, Ltd., Minato-ku, Nagoya, Aichi 455-8670
来源：
Keikinzoku/Journal of Japan Institute of Light Metals | 2009年 / 59卷 / 05期
关键词：
Al-Mg-Si alloy; Bake hardening; DSC analysis; Natural aging;
D O I：
10.2464/jilm.59.248
中图分类号：
学科分类号：
摘要：
Effects of natural aging before pre-aging, pre-aging and natural aging after pre-aging on the bake hardenability of the Al-0.62 mass% Mg-0.96 mass% Si alloy have been studied by tension test, hardness measurement, electrical resistance measurement and differential scanning calorimetric analysis (DSC). The bake hardenability after natural aging at 20°C for 86.4 ks was improved by pre-aging between 100°C and 170°C. In the case of short pre-aging at 100°C, the bake hardenability started to decrease after natural aging for more than 86.4 ks, because the amount of clusters of solute atoms increased. Natural aging before pre-aging causes decreasing the bake hardenability because the clusters formed during natural aging before pre-aging.
引用
收藏
页码：248 / 253
页数：5
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