摘要
利用光学显微镜、X射线衍射仪、扫描电镜、透射电镜、硬度以及力学性能测试仪等对挤压态和时效处理的Mg-6Zn-1Mn-2Sn-0.5Ca镁合金的显微组织和力学性能进行研究。结果表明:合金铸态的相组成为α-Mg,Mn,Mg7Zn3,Ca2Mg6Zn3和CaMgSn相。挤压态组织为完全动态再结晶组织,晶粒尺寸约为2.8μm。固溶时效处理(T6,180℃+10 h)后,合金的强度明显增加,屈服强度和抗拉强度分别为320和390 MPa。合金强度的提高主要是由于晶界强化,固溶强化和析出强化作用。
The microstructures and mechanical properties of as-extruded and peak-aged Mg-6 Zn-1 Mn-2 Sn-0.5 Ca(ZMT612-0.5 Ca)alloy were studied by optical microscopy(OM),X-ray diffractometer(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM),hardness tests and uniaxial tensile tests.The results show that the as-cast alloy consists ofα-Mg,Mn,Mg2 Zn3,Ca2 Mg6 Zn3 and CaMgSn phases.The as-extruded ZMT612-0.5 Ca alloy presents a totally recrystallized microstructure.The average grain size of extruded alloy is^2.8μm.After heat treatment,the strength increases obviously,and the yield strength and ultimate tensile strength of as-extruded alloy are increased to 320 and 390 MPa,respectively.Strength enhancement is attributed to the grain boundary strengthening,solid solution strengthening and precipitation strengthening.
作者
陈霞
张丁非
冯靖凯
赵阳
蒋斌
潘复生
Chen Xia;Zhang Dingfei;Feng Jingkai;Zhao Yang;Jiang Bin;Pan Fusheng(College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China;National Engineering Research Center for Magnesium Alloys,Chongqing University,Chongqing 400044,China;Chongqing Academy of Science and Technology,Chongqing 401123,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2020年第9期2920-2924,共5页
Rare Metal Materials and Engineering
基金
National Key Research and Development Program of China(2016YFB0301101)
National Natural Science Foundation of China(51571040,U1764253,51531002)。
