軽金属
Online ISSN : 1880-8018
Print ISSN : 0451-5994
ISSN-L : 0451-5994
研究論文
Al–Mg–Si合金の多段時効挙動に及ぼす予備時効温度の影響
高木 康夫増田 哲也里 達雄
著者情報
ジャーナル フリー

2013 年 63 巻 7 号 p. 245-252

詳細
抄録

The effect of pre-aging temperature on the natural age hardening and bake hardening behavior of Al–Mg–Si alloys was investigated by means of Vickers hardness test, tensile test, differential scanning calorimetry analysis (DSC) and transmission electron microscopy (TEM). Both the hardness and yield strength change with the natural aging time indicating that the lower pre-aging temperature increases the natural age hardening and decreases the bake hardening response. The DSC analysis confirms that the cluster (1) is formed during natural aging after the pre-aging treatment and the amount increases with the natural aging time. And then, increased pre-aging temperature suppresses the formation of cluster (1), but even if the case of specimens pre-aged at 383 K, the formation of cluster (1) started after natural aging for a longer time than 10.4 Ms. These results are explained by taking into consideration that the remained solute Si, Mg atoms and excess vacancies depend on the amount of cluster (2) formed during pre-aging.

著者関連情報
© 2013 一般社団法人 軽金属学会
次の記事
feedback
Top