ZM6镁合金铸件夹杂物表征及其对拉伸力学性能的影响  

Inclusion Characterization of ZM6 Magnesium Alloy Castings and its Effect on Mechanical Properties

作　　者：沈佳萌 魏振伟 李志农[1] 赵伟 任尚坤[1] 刘昌奎 杨光山 SHEN Jia-meng;WEI Zhen-wei;LI Zhi-nong;ZHAO Wei;REN Shang-kun;LIU Chang-kui;YANG Guang-shan(Key Laboratory of Nondestructive Testing of Ministry of Education,Nanchang Hangkong University,Nanchang 330063,China;AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China;AECC Harbin Dongan Engine Co.Ltd.,Harbin 150066,China)

机构地区：[1]无损检测技术教育部重点实验室(南昌航空大学),南昌330063 [2]中国航发北京航空材料研究院,北京100095 [3]中国航发哈尔滨东安发动机有限公司,哈尔滨150066

出　　处：《失效分析与预防》2023年第5期300-305,共6页Failure Analysis and Prevention

基　　金：中国航发集团创新基金(ZZCX-2019-023)。

摘　　要：夹杂是影响ZM6镁合金铸件力学性能的重要因素。通过拉伸试验测试含有夹杂缺陷ZM6镁合金的力学性能,对试样断口宏观形貌和微观形貌进行观察,测量夹杂物尺寸,定量研究夹杂物的等效直径对抗拉强度和伸长率的影响,建立抗拉强度和伸长率分别与夹杂物等效直径之间的函数关系,并采用ANSYS软件建立含有不同夹杂物尺寸的ZM6镁合金有限模型。结果表明:ZM6合金中的夹杂物主要为氧化镁;等效直径能够很好的表征夹杂物尺寸,随着夹杂物等效直径的增大,抗拉强度和伸长率会随之降低;有限元模拟表明夹杂物和基体界面位置存在明显应力集中,且位于基体较薄界面位置,可较准确预测含不同尺寸夹杂物的合金拉伸性能,拉伸应力应变曲线偏差5%之内,抗拉强度预测误差小于10%。Inclusion is an important factor affecting the mechanical properties of ZM6 magnesium alloy castings.The mechanical properties of ZM6 magnesium alloy with inclusion defects were tested by tensile tests,and the macroscopic and microscopic morphology of the fracture samples were observed.The size of inclusions was measured,and the effect of the equivalent diameter of inclusions on tensile strength and elongation was quantitatively studied.The functional relationship between the tensile strength and elongation and the equivalent diameter of inclusions was established.Finite models of ZM6 magnesium alloys containing different inclusions were established by ANSYS software.The results show that the inclusion of ZM6 alloy is mainly magnesium oxide.The equivalent diameter can represent the inclusion size well.The tensile strength and elongation will decrease with the increase of the equivalent diameter of inclusion.The finite element simulation results show that there is obvious stress concentration at the interface between inclusions and matrix,and it is located at the thin interface of matrix.The tensile properties of alloys containing inclusions of different sizes can be predicted accurately.The deviation of tensile stress-strain curve is within 5%,and the error of tensile strength is less than 10%.

关 键 词：夹杂物 ZM6镁合金 力学性能 有限元模拟 

分 类 号：TG146.2[一般工业技术—材料科学与工程]