Effects of pre-aging treatment on subsequent artificial aging characteristics of Al-3.95Cu-(1.32Mg)-0.52Mn-0.11Zr alloys
来源期刊：中南大学学报(英文版)2015年第1期
论文作者：WU Yi-feng(吴一凤) WANG Ming-pu(汪明朴) 李周 XIA Fu-zhong(夏福中) XIA Cheng-dong(夏承东) LEI Qian(雷前) YU Hong-chun(虞红春)
文章页码：1 - 7
Key words：Al-Cu-(Mg) alloy; pre-aging treatment; precipitation; aging hardening curve
Abstract: The effects of pre-aging treatments on subsequent artificial aging response were investigated by means of transmission electron microscopy observations and hardness test in age hardened Al-3.95Cu-(1.32Mg)-0.52Mn-0.11Zr alloys. In Al-3.95Cu-0.52Mn-0.11Zr alloy, when the pre-aging temperature is 25 °C, the pre-aging treatment has no evident effect on the peak hardness of subsequent artificial aging, while a positive effect (increase of peak hardness) appears when pre-aging temperature is 50 °C. However, in Al-3.95Cu-1.32Mg-0.52Mn-0.11Zr alloy, it is found that whether the pre-aging temperature is 25 °C or 50 °C, the peak artificial aging hardness is lower than that of T6 treated alloy, that is to say, pre-aging treatment has a negative effect on the peak hardness of subsequent artificial aging in the alloys.
WU Yi-feng(吴一凤), WANG Ming-pu(汪明朴), LI Zhou(李周), XIA Fu-zhong(夏福中), XIA Cheng-dong(夏承东), LEI Qian(雷前), YU Hong-chun(虞红春)
(School of Materials Science and Engineering, Central South University, Changsha 410083, China)
Abstract:The effects of pre-aging treatments on subsequent artificial aging response were investigated by means of transmission electron microscopy observations and hardness test in age hardened Al-3.95Cu-(1.32Mg)-0.52Mn-0.11Zr alloys. In Al-3.95Cu-0.52Mn-0.11Zr alloy, when the pre-aging temperature is 25 °C, the pre-aging treatment has no evident effect on the peak hardness of subsequent artificial aging, while a positive effect (increase of peak hardness) appears when pre-aging temperature is 50 °C. However, in Al-3.95Cu-1.32Mg-0.52Mn-0.11Zr alloy, it is found that whether the pre-aging temperature is 25 °C or 50 °C, the peak artificial aging hardness is lower than that of T6 treated alloy, that is to say, pre-aging treatment has a negative effect on the peak hardness of subsequent artificial aging in the alloys.
Key words:Al-Cu-(Mg) alloy; pre-aging treatment; precipitation; aging hardening curve
