摘要
在不同激光能量密度下采用选区激光熔化技术(selective laser melting,SLM)制备了AlSi10Mg合金,分析了SLM成形合金的微观组织、成形缺陷和力学性能。结果显示:SLM成形AlSi10Mg合金时,沿激光扫描方向熔池呈不规则椭圆形,沿成形方向组织呈不规则鱼鳞状分布,相互堆叠。随激光能量密度增大,成形合金的孔隙率减小,致密度增大,拉伸性能更好。当激光能量密度为54 J/mm^(3)时,SLM成形合金的抗拉强度为418.9 MPa,伸长率为20.5%。不同激光能量密度下,拉伸断口形貌均呈现脆性和韧性的混合断裂特征。
AlSi10Mg alloy samples were prepared by selective laser melting technology(SLM) under different laser energy densities.The microstructure,forming defects and mechanical properties of the SLM formed alloy were analyzed.The results show that the molten pool of AlSi10Mg alloy sample is irregular elliptical in scanning direction,and the structure in the forming direction is irregular fish scaly and stacked with each other.With the increase of the laser energy density,the porosity of the formed alloy decreases,and the compactness increases,and the tensile propeties are better.When the laser energy density is 54 J/mm^(3),the tensile strength and elongation of SLM formed alloy are 418.9 MPa and 20.5% respectively.The tensile fracture morphology shows the mixed fracture characteristics of brittleness and toughness under different laser enegy densities.
作者
汪牵牵
刘桐
蔡小叶
程宗辉
宗泽
黄仲佳
骆良顺
WANG Qianqian;LIU Tong;CAI Xiaoye;CHENG Zonghui;ZONG Ze;HUANG Zhongjia;LUO Liangshun(School of Materials Science and Engineering,Anhui Polytechnic University,Wuhu 241000,China;State-Owned Machinery Factory in Wuhu,Wuhu 241007,China;HIT-Chungu Joint Research Center for Additive Manufacturing Materials,Wuhu 241200,China)
出处
《热加工工艺》
北大核心
2023年第17期115-119,共5页
Hot Working Technology
基金
国家自然科学基金青年基金项目(52001001)
安徽工程大学科研启动基金项目(2020YQQ005)
安徽工程大学-繁昌区产业协同创新专项基金项目(2021fccyxta2)。
作者简介
汪牵牵(1997-),女,安徽人,硕士研究生,研究方向:增材制造(选区激光熔化),电话:18256546168,E-mail:1731195770@qq.com;通讯作者:刘桐(1988-),男,安徽人,讲师,博士,研究方向:凝固科学与技术、增材制造,电话:0553-2871738,E-mail:liutong@ahpu.edu.cn。
