Zn添加对预时效态Al-Mg-Si-Cu合金自然时效和烘烤硬化性的影响
朱上1,李志辉1(
),闫丽珍1,李锡武1,张永安1,熊柏青1,2
),闫丽珍1,李锡武1,张永安1,熊柏青1,2
Effects of Zn Addition on the Natural Ageing Behavior and Bake Hardening Response of a Pre-Aged Al-Mg-Si-Cu Alloy
ZHU Shang1,LI Zhihui1(),YAN Lizhen1,LI Xiwu1,ZHANG Yongan1,XIONG Baiqing1,2
),YAN Lizhen1,LI Xiwu1,ZHANG Yongan1,XIONG Baiqing1,2
图7. 预时效态不含Zn和含Zn合金在自然时效和后续烘烤条件下析出相(原子团簇、GP区和β″相)中的溶质原子分数
Fig.7. Fractions of the total amounts of solute atoms incorporated in the precipitates of pre-aged Zn-free and Zn-added alloys under different ageing conditions (For example, 4.56% of the total amount of Mg in the Zn-free alloy after PA+NA 2 d was incorporated in clusters, so 95.44% of the Mg remained in the matrix. Different types of precipitates are distinguished in Fig.5)(a) Zn-free alloy after PA+NA 2 d and PA+NA 2 d+BH(b) Zn-free alloy after PA+NA 120 d and PA+NA 120 d+BH(c) Zn-added alloy after PA+NA 2 d and PA+NA 2 d+BH(d) Zn-added alloy after PA+NA 120 d and PA+NA 120 d+BH
