Eects of T5 Treatment on Microstructure andMechanical Properties at Elevated Temperature of AZ80-Ag Alloy
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- DOI码：10.3390/ma12193214
- 发表刊物：Materials
- 关键字：AZ80-Ag alloy; T5 treatment; creep; precipitation.
- 摘要：Effects of T5 treatment on microstructure and mechanical properties at elevated temperature of hot-ring-rolled (HRRed) AZ80-Ag magnesium alloy were systematically investigated. Results show that, after aging at 175 °C for 36 h, discontinuous and continuous precipitates form inside grains, with the former one taking up a volume fraction of ~64.9%. T5 treatment improves the tensile strength at ambient temperature of the alloy but weakens its tensile strength and creep resistance at elevated temperatures (120-175 °C), indicating opposite effects of T5 on mechanical properties at ambient and elevated temperatures. During creep at 120-175 °C and under 70-90 MPa, the dynamic precipitation process in HRRed specimen is accelerated with increasing temperature. At 150-175 °C massive nucleation and growth of dynamic discontinuous precipitates could result in an atypical primary creep stage, consisting of deceleration and acceleration creep stages, which is reported in wrought Mg-Al-based alloy for the first time. Such primary creep stage can be eliminated by T5 treatment. Besides, diffusion-controlled dislocation creep is the dominant creep mechanism for both HRRed and T5 specimens.
- 合写作者：Chuming Liu, Shunong Jiang, Shilun Yu, Zhiyong Chen
- 第一作者：Gang Zeng
- 论文类型：期刊论文
- 通讯作者：Yonghao Gao
- 论文编号：3214
- 卷号：12
- 是否译文：否
- 发表时间：2019-09-30
- 收录刊物：SCI
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