Effect of Laser Parameters on Microstructure,Metallurgical Defects and Property of AlSi10Mg Printed by Selective Laser Melting
AlSi10Mg alloy has been widely used in selective laser melting(SLM).However,the formation of metallurgical defects in this material during SLM process has not been studied in sufficient depth.In this work,different laser parameters were adopted to fabricate the specimens.The effects of volumetric energy density(VED)on the metallurgical defect,densification,phase composition and mechanical property were also comprehensively analyzed.At low VED of 37.39 J/mm3,a nearly full dense sample with density of 2.602 g/cm3 can be printed.The sample with maximal tensile strength of 475 MPa can be printed.While with the increase of VED,the ultimate tensile strength decreases due to the formation of micro-pores.The formation mechanisms of micro-pores including gas pores and keyhole induced pores were disclosed from the angle of alloy smelting.Better understanding the influence mechanisms of the laser parameters on formation of metallurgical defects is beneficial for the production of high performance SLM parts.
Selective laser melting additive manufacturing AlSi10Mg metallurgical defect
Wu Hong Ren Junye Huang Qianli Zai Xiongfei Liu Ling Chen Chao Liu Shifeng Yang Xin Li Ruidi
State Key Laboratory of Powder Metallurgy,Central South University,Changsha,Hunan 410083,China School of Metallurgical Engineering,Xian University of Architecture and Technology,Xian,Shaanxi 71 School of Materials Science and Engineering,Xian University of Technology,Xian,Shaanxi 710048,Chin
国际会议
北京
英文
1688-1697
2018-09-16（万方平台首次上网日期，不代表论文的发表时间）