Selective laser melting of dispersed TiC particles strengthened 316L stainless steel

被引:145
作者
Zhai, Wengang [1 ,2 ]
Zhu, Zhiguang [2 ]
Zhou, Wei [1 ]
Nai, Sharon Mui Ling [2 ]
Wei, Jun [2 ]
机构
[1] Nanyang Technol Univ, Sch Mech & Aerosp Engn, 50 Nanyang Ave, Singapore 639798, Singapore
[2] Singapore Inst Mfg Technol, 73 Nanyang Dr, Singapore 637662, Singapore
关键词
316L stainless Steel; TiC particles; Low energy ball milling; Selective laser melting; HIGH-YIELD STRENGTH; MECHANICAL-PROPERTIES; CORROSION BEHAVIOR; MATRIX COMPOSITES; TENSILE-STRENGTH; MICROSTRUCTURE; DUCTILITY; NANOCOMPOSITES; POWDER;
D O I
10.1016/j.compositesb.2020.108291
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
316L austenitic stainless steel has a wide range of industrial applications. However, one of the major drawbacks is its low yield strength (170-300 MPa in annealed state). We report a method to strengthen 316L by adding 1 wt % and 3 wt% micron-sized TiC particles using low energy ball milling for the powder feedstock preparation followed by selective laser melting (SLM). The TiC particles were observed to be uniformly dispersed and well bonded to the 316L matrix after SLM. The 316L-TiC composites obtained were close to full density and the austenite grains were significantly refined with the addition of TiC particles. Tensile tests show that adding 1 wt % and 3 wt% TiC particles leads to a significantly increased yield strength (660 MPa and 832 MPa) and UTS (856 MPa and 1032 MPa) and maintains the good ductility (55% and 29% elongation). These findings offer a new perspective on the strengthening of 316L stainless steel
引用
收藏
页数:9
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