摘要
采用光学显微镜(OM),扫描电镜(SEM),X射线衍射仪(XRD)等分析方法研究了添加Ca和Sn对Mg-6Zn-1Mn(ZM61)合金显微组织和力学性能的影响。结果表明:ZM61合金中主要的第二相为Mg7Zn3,添加0.5 mass%Ca后合金中出现Ca2Mg6Zn3相,Mg7Zn3相减少,动态再结晶不完全,织构增强,强度和塑性提高;在ZM61-0.5Ca合金中添加1 mass%Sn,合金中出现针状新相CaMgSn,该相抑制Ca2Mg6Zn3的形成。ZM61-0.5Ca-1Sn合金综合力学性能最佳,屈服强度、抗拉强度和伸长率分别为319 MPa,358 MPa和13.5%。
The effects of addition of Ca and Sn on microstructure and mechanical properties of Mg-6Zn-1Mn(ZM61) alloy were studied by means of optical microscope(OM), scanning electron microscopy(SEM) and X-ray diffractometer(XRD). The results show that the main secondary phase of the ZM61 alloy is Mg7Zn3. After the addition of 0.5 mass% Ca in the alloy, the Ca2Mg6Zn3 phase is observed in the alloy, the amount of the Mg7Zn3 phase decreases, the dynamic recrystallization of the alloy is not complete, the texture is enhanced, and the strength and the plasticity are improved. When 1 mass% Sn is added to the ZM61-0.5Ca alloy, the needle-like new phase CaMgSn appears in the alloy, and inhibits the formation of the Ca2Mg6Zn3 phase. The comprehensive mechanical properties of the ZM61-0.5Ca-1Sn alloy are the best, and the yield strength, the tensile strength and the elongation are 319 MPa,358 MPa and 13.5%, respectively.
作者
陈霞
张丁非
邓天宇
赵阳
冯靖凯
蒋斌
潘复生
CHEN Xia;ZHANG Ding-fei;DENG Tian-yu;ZHAO Yang;FENG Jing-kai;JIANG Bin;PAN Fu-sheng(College of Materials Science and Engineering,Chongqing University,Chongqing 400045,China;National Engineering Research Center for Magnesium Alloys,Chongqing University,Chongqing 400044,China;Chongqing Academy of Science and Technology,Chongqing 401123,China)
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2019年第12期13-18,共6页
Transactions of Materials and Heat Treatment
基金
国家重点研发计划项目(2016YFB0301101)
国家自然科学基金面上项目(51571040)
国家自然科学基金重点项目(U1764253
51531002)
