摘要
研究了SLM成形工艺参数对新型高强Al-5Mg-0.75Sc合金微观组织与力学性能的影响。结果表明,SLM成形Al-5Mg-0.75Sc合金的微观组织特征表现为典型的熔池堆叠形貌;在一定范围内,激光能量密度越高,SLM成形试样的致密度越高,维氏硬度增加;能量密度为74.40 J/mm^(3)时,合金力学性能较优,硬度(HV)最高达到120,抗拉强度和伸长率分别为443.5 MPa和24%;SLM成形Al-5Mg-0.75Sc合金试样拉伸断口表现为典型韧性断裂。
Effects of SLM process parameters on microstructure and mechanical properties of Al-5 Mg-0.75 Sc alloy were investigated systematically.The results indicate that the SLM formed Al-5 Mg-0.75 Sc alloy is characterized by typical molten pool stack morphology.In a certain range,with increasing in the laser energy density,the density and Vickers hardness of SLM specimens are increased.When the energy density is 74.40 J/mm^(3),the mechanical properties are desirable,where the hardness reaches the maximum of 120 HV,and the tensile strength and elongation reach 443.5 MPa and 24%,respectively.The tensile fracture of SLM formed Al-5 Mg-0.75 Sc alloy is dominated by typical ductile fracture.
作者
程宗辉
刘桐
汪牵牵
董定平
蔡小叶
李晨雨
骆良顺
苏彦庆
Cheng Zonghui;Liu Tong;Wang Qianqian;Dong Dingping;Cai Xiaoye;Li Chenyu;Luo Liangshun;Su Yanqing(State-Owned Wuhu Machinery Factory;School of Materials Science and Engineering,Anhui Polytechnic University;School of Materials Science and Engineering,Harbin Institute of Technology;Anhui HIT 3DTechnology Co.,Ltd.)
出处
《特种铸造及有色合金》
CAS
北大核心
2022年第9期1061-1066,共6页
Special Casting & Nonferrous Alloys
基金
国家自然科学基金青年基金资助项目(52001001)
安徽工程大学科研启动基金资助项目(2020YQQ005)
安徽工程大学-繁昌区产业协同创新专项基金资助项目(2021fccyxta2)
作者简介
第一作者:程宗辉,男,1979年出生,高级工程师,安徽芜湖(340200),E-mail:blielt@163.com;通信作者:刘桐,男,1988年出生,讲师,安徽芜湖(340200),E-mail:liutong@ahpu.edu.cn
