激光沉积制造SiC/ZL114A复合材料组织及力学性能研究  

Microstructure and mechanical properties of the SiC/ZL114A composite fabricated by laser deposition manufacturing

作　　者：吕长生 王立权[1] 伊俊振 LYU Changsheng;WANG Liquan;YI Junzhen(School of Mechanical and Electrical Engineering,Harbin Engineering University,Harbin 150001,China;School of Materials Science and Engineering,Shenyang Aerospace University,Shengyang 110136,China)

机构地区：[1]哈尔滨工程大学机电工程学院,黑龙江哈尔滨150001 [2]沈阳航空航天大学材料科学与工程学院,辽宁沈阳110136

出　　处：《哈尔滨工程大学学报》2023年第4期615-621,共7页Journal of Harbin Engineering University

基　　金：国家重点研发计划(2022YFE0122600);中国航空发动机集团产学研合作项目(HFZL2021CXY025-1)。

摘　　要：为了提高铝基复合材料送粉式激光沉积制造成形工艺,本文开展了SiC/ZL114A铝基复合材料的激光沉积制备研究。采用光学显微镜、电子万能试验机对复合材料的组织及力学性能进行分析,研究了激光沉积工艺参数和SiC颗粒含量对显微组织及拉伸性能的影响。结果表明:复合材料的组织由ZL114A基体组织和SiC颗粒组成,随着激光功率密度的增加,沉积层中部的SiC含量增多,但表面的SiC含量减少。经多道多层沉积后,使SiC颗粒重新分布,SiC颗粒在沉积层中分布均匀;当SiC颗粒含量为10%时,材料的强度最高,随SiC颗粒含量的增加,SiC/ZL114A复合材料的强度和塑性持续下降。本文可促进铝基复合材料在航空航天等复杂领域的应用。To increase the process of powder-feeding laser deposition for aluminum matrix composites,SiC/ZL114A aluminum matrix composites were prepared by laser deposition manufacturing.The microstructure and mechanical properties were deeply studied using an optical microscope and electronic universal testing machine.The effects of laser deposition parameters and SiC particle content on the microstructure and tensile properties were investigated.The results show that the deposited microstructure comprises a ZL114A matrix structure and SiC particles.With increasing laser power density,the SiC content increases in the middle of the sedimentary layer but decreases on the surface.After a multichannel and multilayer deposition,the SiC particles are redistributed and become more evenly distributed in the sedimentary layer.When the SiC content is 10%,the strength of the SiC/ZL114A composite is the highest;with increasing SiC content,the strength and plasticity decrease continuously.This study promotes the application of aluminum-based composites in complex fields such as aerospace engineering.

关 键 词：激光沉积制造 铝基复合材料 ZL114A合金 SIC颗粒 激光功率 扫描速度 显微组织 拉伸性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]