增材制造铝镁合金AlSi10Mg的疲劳性能研究  

Research on the fatigue behavior of additive manufacture materials of AlSi10Mg

作　　者：万华亮 王奇志[2] WAN Hua-liang;WANG Qi-zhi(China Aviation Industry General Aircraft Institute Co.,Ltd,Zhuhai 519040,China;School of Aeronautic Science andEngineering of Beihang unvisity,Beijing 100191,China)

机构地区：[1]中航通飞研究院有限公司,珠海519040 [2]北京航空航天大学航空科学与工程学院,北京100191

出　　处：《强度与环境》2019年第3期20-26,共7页Structure & Environment Engineering

基　　金：民机科研(MJ-2014-G-28)

摘　　要：本文主要研究了增材制造铝镁合金AlSi10Mg的疲劳性能。根据铝镁合金AlSi10Mg的金相图,建立了单胞模型。该单胞模型反应了增材制造铝镁合金AlSi10Mg的细观缺陷,包括孔洞缺陷和表面缺陷。通过损伤力学-有限元方法,分析计算单胞模型的损伤演化,来预估增材制造铝镁合金AlSi10Mg的疲劳寿命。其中,通过增材制造AlSi10Mg的标准疲劳试验数据,确定损伤演化方程中的材料参数。在本文中,通过预估不同孔隙率的增材制造AlSi10Mg的疲劳寿命,分析了孔隙率对增材制造AlSi10Mg疲劳性能的影响。In this paper, the fatigue behavior of additive manufacture materials of AlSi10Mg is evaluated. According to the metallographic image of additive manufacture materials of AlSi10Mg, a cell model is established. For this cell model, some meso-scale defects about additive manufacture materials of AlSi10Mg are reflected, including void defect and surface roughness. Using the damage mechanics-finite element method, the damage evolution of cell model is calculated and the fatigue life of additive manufacture materials of AlSi10Mg is predicted. Through the standard fatigue experimental data of additive manufacture materials of AlSi10Mg, the material parameters in the damage evolution equation are determined. In this article, predicting fatigue life of additive manufacture materials of AlSi10Mg with different porosity, the influence of porosity on the fatigue behavior of additive manufacture materials of AlSi10Mg is evaluated.

关 键 词：增材制造 AlSi10Mg 单胞模型 疲劳寿命 孔隙率 

分 类 号：TB331[一般工业技术—材料科学与工程]