后时效对超细晶<strong>6061</strong>铝合金微观结构与力学性能的影响

后时效对超细晶6061铝合金微观结构与力学性能的影响

刘满平, 薛周磊, 彭振, 陈昱林, 丁立鹏, 贾志宏

Effect of Post-Aging on Microstructure and Mechanical Properties of an Ultrafine-Grained 6061 Aluminum Alloy

LIU Manping, XUE Zhoulei, PENG Zhen, CHEN Yulin, DING Lipeng, JIA Zhihong

表2 ECAP后时效合金中各强化机制对合金总强度的贡献及所占比例

Table 2 Contributions and proportions of strengthening mechanisms to the strength of the post-aging alloy

State	σ_exp / MPa	σ_0.2 / MPa	σ_gs / MPa	σ_ρ / MPa	σ_prec / MPa
ECAPed + 80^oC, 20 min	483	471	95 (20.2%)	147 (31.2%)	229 (48.6%)
ECAPed + 110^oC, 10 min	434	434	93 (21.4%)	129 (29.7%)	212 (48.8%)
ECAPed + 170^oC, 5 min	365	370	82 (22.2%)	113 (30.5%)	175 (47.3%)