Microstructure evolution and EBSD analysis of a graded steel fabricated by laser additive manufacturing

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	Microstructure evolution and EBSD analysis of a graded steel fabricated by laser additive manufacturing
	Wang, Qiang ; Zhang, Song ; Zhang, ChunHua ; Wu, Chenliang ; Wang, Jianqiang ; Chen, Jiang ; Sun, Zulai
刊名	VACUUM
	2017-07-01
卷号	141 页码:68-81
关键词	Additive manufacturing Graded steel Direct laser metal deposition Grain growth Electron backscatter diffraction (EBSD)
ISSN号	0042-207X
通讯作者	Wang, Q (reprint author), China Med Univ, Sch Stomatol, Shenyang 110002, Peoples R China. ; Zhang, S (reprint author), Shenyang Univ Technol, Sch Mat Sci & Engn, Shenyang 110870, Peoples R China.
中文摘要	This paper demonstrates the successful fabrication of a graded steel with successive 15 layers by direct laser metal deposition. The phase evolution, microstructure and grain growth of the as-built graded steel were investigated by X-ray diffraction (XRD), optical microscopy (OM), and electron back-scatter diffraction (EBSD), respectively. Experimental results showed that the crystal structures of the graded steel evolved from FCC (Austenite) in the first two grades to BCC (Ferrite) with a small trace of Austenite phase. Columnar dendrites are observed in the first and second grade with the growth orientation horizontal to the direction of the laser deposition. The third grade has a finer microstructure with equiaxed grains. Preferred texture was dominant in the microstructure for the first two grades with low angle grain boundaries (about 2). No preferred texture was observed in the third grade. Large-angle grain boundaries are available in the third grade with distribution from 50 degrees to 60 degrees. Our findings suggest that a graded steel with microstructure and grain growth orientation evolution can be obtained by direct laser metal deposition. The evolution of microstructure and grain growth was not changed by different scanning rate. (C) 2017 Elsevier Ltd. All rights reserved.
学科主题	Materials Science, Multidisciplinary ; Physics, Applied
收录类别	SCI
资助信息	National Key Research and Development Program of China [2016YFB1100204, 2013ZX06002-002]; National Natural Science Foundation of China [51271126]; Shenyang Science and Technology Funded Project [F16-032-0-00]; Youth Foundation of School of Stomatology, China Medical University [K101593-17-05]
语种	英语
公开日期	2017-08-17
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/78067]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	Wang, Qiang,Zhang, Song,Zhang, ChunHua,et al. Microstructure evolution and EBSD analysis of a graded steel fabricated by laser additive manufacturing[J]. VACUUM,2017,141:68-81.
APA	Wang, Qiang.,Zhang, Song.,Zhang, ChunHua.,Wu, Chenliang.,Wang, Jianqiang.,...&Sun, Zulai.(2017).Microstructure evolution and EBSD analysis of a graded steel fabricated by laser additive manufacturing.VACUUM,141,68-81.
MLA	Wang, Qiang,et al."Microstructure evolution and EBSD analysis of a graded steel fabricated by laser additive manufacturing".VACUUM 141(2017):68-81.