Effects of aging temperature on microstructure, tensile and creep properties of ring rolled AZ80-Ag alloy
发布时间：2021-07-12
点击次数：
影响因子：5.234
DOI码：10.1016/j.msea.2018.07.061
发表刊物：Materials Science and Engineering: A
关键字：Magnesium alloy; Aging behavior; Creep performance; Dislocation
摘要：In this study, aging behavior, tensile property and creep performance of the ring rolled AZ80-Ag magnesium alloy at different aging temperatures were systematically investigated. Results show that the microstructure is mainly occupied by discontinuous precipitation (DP) and continuous precipitation (CP) of beta-Mg17Al12 after T6 treatment. The peak aging at low temperature (175 degrees C) results in a larger volume fraction of 13 precipitation and a lower CP/DP ratio than peak aging at high temperature (250 degrees C). With raising aging temperature, the tensile strength at ambient temperature reveals a descending tendency, whereas the creep resistance at 120-175 degrees C under 70-90 MPa exhibits an enhancement. Based on the analysis of creep stress exponent and activation energy values, the dominant creep mechanism of both aged specimens is dislocation creep controlled by competing lattice diffusion and pipe diffusion. Basal < a > and non-basal < c + a > dislocations can be activated in the creep deformation.
合写作者：Chuming Liu, Yonghao Gao, Shunong Jiang, Zhiyong Chen
第一作者：Gang Zeng
论文类型：期刊论文
通讯作者：Yingchun Wan
论文编号：WOS:000445993900008
学科门类：工学
一级学科：材料科学与工程
文献类型：J
卷号：734
页面范围：59-66
是否译文：否
发表时间：2018-09-12
收录刊物：SCI、EI