时效温度对Mg-2.0Zn-1.0Y-0.5Zr合金组织与性能的影响
Effect of aging temperature on microstructure and properties of Mg-2.0Zn-1.0Y-0.5Zr alloy
郑向阳 1贺俊光 2冯武云 1龚圆 1田培梧1
作者信息
- 1. 河南科技大学材料科学与工程学院,河南 洛阳 471023
- 2. 河南科技大学材料科学与工程学院,河南 洛阳 471023;有色金属新材料与先进加工技术省部共建协同创新中心,河南 洛阳 471023
- 折叠
摘要
采用扫描电镜(SEM)、X射线衍射(XRD)、拉伸试验、浸泡试验和电化学试验等研究了固溶态Mg-2.0Zn-1.0Y-0.5Zr合金在 180～220℃时效 12 h后的微观组织、耐蚀性能和力学性能.结果表明:随着时效温度从 180℃升高到 220℃,合金中析出的颗粒状第二相数量增多,第二相体积分数由 0.03%(固溶态)升至0.36%(220℃时效12 h),力学性能明显提高,但耐蚀性能下降.当时效温度为 200℃时,合金的综合性能较优,其抗拉强度、屈服强度、伸长率和腐蚀速率分别为(268.1±11.3)MPa、(170.4±8.5)MPa、(15.8±0.6)%和(0.575±0.039)mm/y.
Abstract
Microstructure,corrosion resistance and mechanical properties of solution treated Mg-2.0Zn-1.0Y-0.5Zr alloy aged at 180-220℃ for 12 h were studied by means of scanning electron microscopy(SEM),X-ray diffraction(XRD),tensile test,immersion test and electrochemical test.The results show that as the aging temperature increases from 180℃ to 220℃,the number of granular second phases precipitated in the alloy increases,and the volume fraction of the second phase increases from 0.03%(solution treated)to 0.36%(aged at 220℃ for 12 h).The mechanical properties of the alloy are significantly improved,but the corrosion resistance decreases.When the aging temperature is 200℃,the comprehensive properties of the alloy are better,with tensile strength,yield strength,elongation and corrosion rate of(268.1±11.3)MPa,(170.4±8.5)MPa,(15.8±0.6)%and(0.575±0.039)mm/y,respectively.
关键词
Mg-2.0Zn-1.0Y-0.5Zr合金/时效温度/力学性能/耐蚀性能Key words
Mg-2Zn-1Y-0.5Zr alloy/aging temperature/mechanical property/corrosion resistance引用本文复制引用
基金项目
河南省高等学校重点科研项目(20A430010)
河南科技大学大学生研究训练计划(SRTP)项目(2022057)
出版年
2024
NETL
NSTL
万方数据