Role of processing parameters on relative density,microstructure and mechanical properties of selective laser melted titanium alloy  

作　　者：Tian-yu Liu Bo-liang Liu Jiao-jiao Cheng Shi-bing Liu Kun Shi Hong-yu Liu Jun Zhao 

机构地区：[1]National Key Laboratory of Advanced Casting Technologies,Shenyang Research Institute of Foundry Co.,Ltd.CAM,Shenyang 110022,China

出　　处：《China Foundry》2024年第6期676-684,共9页中国铸造（英文版）

基　　金：supported by Liaoning Doctoral Research Start-up Fund project(Grant No.2023-BS-215).

摘　　要：The relationships between the selective laser melting(SLM)processing parameters including laser power,scanning speed and hatch space,the relative density,the microstructure,and resulting mechanical properties of Ti-6Al-2Zr-1Mo-1V alloy were investigated in this work.The result shows that laser power acts a dominant role in determining the relative density in comparison with scanning speed and hatch space.The optimal SLM process window for fabricating relative density>99%samples is located in the energy density range of 34.72 J·mm^(-3)to 52.08 J·mm^(-3),where the laser power range is between 125 W and 175 W.An upward trend is found in the micro-hardness as the energy density is increased.The optimum SLM processing parameters of Ti-6Al-2Zr-1Mo-1V alloy are:laser power of 150 W,scanning speed of 1,600 mm·s^(-1),hatch space of 0.08 mm,and layer thickness of 0.03 mm.The highest ultimate tensile strength,yield strength,and ductility under the optimum processing parameter are achieved,which are 1,205 MPa,1,099 MPa,and 8%,respectively.The results of this study can be used to guide SLM production Ti-6Al-2Zr-1Mo-1V alloy parts.

关 键 词：selective laser melting processing parameter Ti-6Al-2Zr-1Mo-1V titanium alloy relative density MICROSTRUCTURE mechanical properties 

分 类 号：TG146.23[一般工业技术—材料科学与工程]