论文摘要
The effects of atmosphere conditions on microstructural and mechanical properties of stainless steel 17-4PH components fabricated by laser direct manufacturing（LDM） were investigated through measurements on phase constitution, porosity, tensile strength, fracture morphology, hardness and evolution of substrate temperature. Results showed that the samples produced in air atmosphere condition possessed higher tensile strength and hardness for both as-deposited and heat-treated states than that in Ar chamber condition, due to dispersion strengthening effect of amorphous oxide particles and nitrogen solution strengthening as a result of higher content of oxygen and nitrogen. The temperature of substrate heat accumulation was higher in Ar chamber condition, leading to dramatically lower porosity and more reverse austenite, which also contributed to the lower strength and hardness.
论文目录
文章来源
类型: 期刊论文
作者: D.Wang,C.T.Chi,W.Q.Wang,Y.L.Li,M.S.Wang,X.G.Chen,Z.H.Chen,X.P.Cheng,Y.J.Xie
来源: Journal of Materials Science & Technology 2019年07期
年度: 2019
分类: 工程科技Ⅰ辑
专业: 金属学及金属工艺
单位: Institute of Applied Physics, Jiangxi Academy of Sciences,Institute of Metal Research, Chinese Academy of Sciences,School of Mechanical and Electrical Engineering, Nanchang University,Jiangxi Reman Additive Technology Co.Ltd
基金: financial support from National Key Research and Development Program of China [grant number 2016YFB1100203],Key Research and Development Program of Jiangxi Province [grant numbers 20171BBE50022,20151BBE51065],Scientific Research Special Funds of Jiangxi Academy of Sciences [grant numbers 2014-XTPH1-16,2014-YYB16],Key Research Project of Jiangxi Academy of Sciences [grant number 2016-YZD2-01]
分类号: TG142.71
页码: 1315-1322
总页数: 8
文件大小: 1704K
下载量: 29