典型文献
Influence of Selective Laser Melting Process Parameters on Microstructure and Properties of a Typical Ni-Based Superalloy
文献摘要：
The influence of selective laser melting(SLM)process parameters on the microstructure and mechanical properties of a typi-cal Ni-based superalloy was researched.The optimum parameters of P=170 W,V=0.8 m/s were determined,under which the SLMed samples exhibited both the largest relative density of 99.57％and the best mechanical properties,including the microhardness(329.3±3.8 HV),yield strength(726±8.1 MPa),ultimate tensile strength(900±5.9 MPa)and elongation((31.9±0.24)％).The average grain size ranges of SLMed samples are from 15.2 to 17.4 pm,with a typical mixed grain structure.Owing to the high cooling rate and remelting during SLM process,a large number of low-angle grain boundaries(LAGBs),dislocations and sub-grains were formed,and the fraction of LAGBs reached above 65％.At the same time,the content of low-∑ coincidence site lattice(CSL)boundaries was mostly less than 1％,while there was almost no γ'phase precipitated in the matrix.The texture of SLMed samples was weak,and there was no obvious preferred growth direction.Combining with the microstructure characterization,both grain refinement strengthening and dislocation strengthening were considered as the main strengthening mechanisms.Moreover,the fracture mechanism of the optimum sample belonged to ductile fracture.
文献关键词：
中图分类号：
作者姓名：
Zhen Lu;Chengcai Zhang;Nana Deng;Haiping Zhou;Ruirui Fang;Kuidong Gao;Yukuo Su;Hongbin Zhang
作者机构：
School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China;College of Mechanical and Electronic Engineering,Shandong University of Science and Technology,Qingdao 266590,China;Jier Machine-Tool Group Co.Ltd,Jinan 250022,China
文献出处：
引用格式：
[1]Zhen Lu;Chengcai Zhang;Nana Deng;Haiping Zhou;Ruirui Fang;Kuidong Gao;Yukuo Su;Hongbin Zhang-.Influence of Selective Laser Melting Process Parameters on Microstructure and Properties of a Typical Ni-Based Superalloy)[J].金属学报（英文版）,2022(10):1673-1687
A类：
SLMed
B类：
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AB值：
0.601771
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