xTiC/LA123复合材料力学性能及显微组织研究  

Study on mechanical properties and microstructure of xTiC/LA123 composite

作　　者：王开明 张扬 康豪 张宁 WANG Kaiming;ZHANG Yang;KANG Hao;ZHANG Ning(School of Materials Engineering,Jiangsu University of Technology,Jiangsu 213001,China)

机构地区：[1]江苏理工学院材料工程学院,江苏常州213001

出　　处：《兵器材料科学与工程》2024年第6期36-39,共4页Ordnance Material Science and Engineering

基　　金：中国博士后科学基金面上资助(2019M650096);江苏省高等学校基础科学(自然科学)重大项目(21KJA430009);常州市科技支撑计划(社会发展)(CE20235041)。

摘　　要：强度不足是限制镁锂合金材料研究和应用的难题之一,复合化是提高金属材料强度的一条有效途径。本文采用搅拌铸造法制备了颗粒增强xTiC/LA123复合材料,并对其进行轧制变形。通过XRD、SEM和力学性能测试,研究TiC颗粒对铸态及轧制态xTiC/LA123复合材料力学性能及显微组织的影响。结果表明:随着TiC含量的升高,铸态复合材料晶粒尺寸降低,强度先升后降,在TiC的质量分数为6%时强度最高,屈服强度及抗拉强度为152、156 MPa。轧制后TiC颗粒沿轧制方向呈流线状分布,且强度变化规律与铸态复合材料规律一致,随TiC含量升高先升后降,屈服强度及抗拉强度升至237、252 MPa,比铸态分别提高了43%和44%。Lack of strength is one of the difficult problems that limit the research and application of MG-Li alloy materials.Compound is an effective way to improve the strength of metal materials.In this paper,particle reinforced xTiC/LA123 composite was prepared by stir casting method and deformed by rolling.The effects of TiC particles on the mechanical properties and microstructure of as-cast and rolled xTiC/LA123 composites were investigated by XRD,SEM and mechanical properties tests.The results show that the grain size of the as-cast composites decreases with the increase of TiC content,and the strength increases first and then decreases.The highest strength is obtained when the TiC content is 6%,and the yield strength and tensile strength are 152 MPa and 156 MPa.After rolling,the TiC particles distributed in a linear manner along the rolling direction,and the change of strength is consistent with that of the as-cast composites.With the increase of TiC content,the yield strength and tensile strength increase to 237 MPa and 252 MPa,which are 43%and 44%higher than that of the as-cast composites,respectively.

关 键 词：镁锂基复合材料 TIC颗粒 显微组织 力学性能 

分 类 号：TG146.22[一般工业技术—材料科学与工程]