Revealing the influence of pre-strain on precipitation behavior of AZ80 magnesium alloy during aging treatment

被引：0

作者：

Qiu, Xin ^{[1
]}

Huang, Zhuo ^{[2
]}

Liu, Shichao ^{[2
]}

Xiang, Chongchen ^{[2
]}

Wang, Zijiang ^{[2
]}

Ding, Hanlin ^{[2
]}

机构：

[1] Suzhou City Univ, Sch Opt & Elect Informat, Suzhou 215104, Peoples R China

[2] Soochow Univ, Sch Iron & Steel, Suzhou 215006, Peoples R China

来源：

MATERIALS CHARACTERIZATION | 2025年 / 228卷

基金：

中国国家自然科学基金;

关键词：

Magnesium alloy; Precipitation behavior; Aging; (3-Mg 17 Al 12 phase; MECHANICAL-PROPERTIES; KINETICS;

D O I：

10.1016/j.matchar.2025.115426

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper, the solid solution-treated AZ80 alloy was subjected to an 8 % compression prior to isothermal aging treatment at 200 degrees C, aiming to reveal the influence of induced twins and dislocations on aging behavior. The aging hardening effect, microstructure evolution and precipitates were subsequently investigated. Additionally, the precipitation kinetics of the (3-Mg17Al12 phase during the aging process were analyzed using the JohnsonMehl-Avrami-Kolmogorov (JMAK) equation. The results demonstrated that continuous precipitates (CPs), which formed in the compressed alloy during the initial aging stage, predominantly distributed within twins and regions of accumulated dislocations. In contrast, no CPs were observed in the uncompressed alloy even after aging for up to 128 min. Such discrepancy underscores the pivotal role of dislocations in the formation of CPs, as precipitation and recovery occur simultaneously in the compressed alloy during aging treatment. In addition, quasi-in-situ observations and quantitative statistical analysis confirmed the inhibitory effect of pre-compression on the growth of precipitated CPs, attributed to a pinning effect rather than a reduction in chemical driving force. It is anticipated that this work will provide a better understanding of the influence of pre-strain on precipitation in magnesium alloys.

引用

页数：10

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