增材制造铝镁合金AlSi10Mg的疲劳性能研究
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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.
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.
引文
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[3]王迪,杨永强,黄延禄,等.层间扫描策略对SLM直接成型金属零件质量的影响[J].激光技术,2010,34:443-446.[Wang Di,Yang Yongqiang,Huang Yanlu,et al.Impact of inter-layer scan strategy on quality of direct fabrication metal parts in SLMprocess[J].Laser Technology,2010,34:443-446.]
[4]T Vilaro,C Colin,et al.Micro structural and mechanical approaches of the selective laser melting process applied to a nickel-base super-alloy[J].Materials Science and Engineering:A,2012,534:446-451.
[5]E Brandl,U Heckenberger,V Holzinger,et al.Additive manufactured AlSi10Mg samples using Selective Laser Melting(SLM):Microstructure,high cycle fatigue,and fracture behavior[J].Materials&Design,2012,34:159-169.
[6]T M Mower,M J Long.Mechanical behavior of additive manufactured,powder-bed laser-fused materials[J].Materials Science&Engineering A,2016:198-213.
[7]K Kempen,L Thijs,J VanHumbeek,et al.Mechanical properties of AlSi10Mg produced by selective laser melting[J].Phys.Procedia,2012,39:439-446.
[8]徐丽,武书阁,赵智姝,等.基于断口观测的2Al2铝合金微动疲劳损伤研究[J].强度与环境,2016,43(5):52-56.[Xu Li,WUShuge,Zhao Zhishu,et al.The fretting fatigue damage research based on fracture observation of 2A12 aluminum alloy[J].Structure&Environment Engineering,2016,43(5):52-56.]
[9]吴建国,李海波.基于累积损伤的结构动力可靠性研究进展[J].强度与环境,2013,40(5):10-15.[Wu Jianguo,Li Haibo.Research on dynamic reliability of connecting structure based vibration fatigue damage[J].Structure&Environment Engineering,2013,40(5):10-15.]
[10]张丹峰,陈跃良.海洋环境下飞机结构疲劳性能退化规律研究[J].强度与环境,2009,36(5):39-42.[Zhang Danfeng,Chen Yueliang.Research on the degradation rule of fatigue performance of aircraft structure under marin environment[J].Structure&Environment Engineering,2009,36(5):39-42.]
[11]M Zhang,Q Meng,W Hu,et al Damage mechanics method for fatigue life prediction of Pitch-Change-Link[J].International Journal of Fatigue,2010,32:1683-1688.
[12]张行,崔德渝,孟庆春,等.断裂与损伤力学(第二版)[M].北京:北京航空航天大学出版社,2009.