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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; 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.
2017-07-01
Source PublicationVACUUM
ISSN0042-207X
Volume141Pages:68-81
AbstractThis 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.; 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.
description.department[wang, qiang] china med univ, sch stomatol, shenyang 110002, peoples r china ; [wang, qiang ; zhang, song ; zhang, chunhua ; wu, chenliang] shenyang univ technol, sch mat sci & engn, shenyang 110870, peoples r china ; [wang, qiang ; chen, jiang] shenyang dalu laser grp co ltd, shenyang 110002, peoples r china ; [wang, jianqiang] chinese acad sci, inst met res, shenyang 110016, peoples r china ; [sun, zulai] inst shenyang vacuum technol res, shenyang 110042, peoples r china
KeywordAdditive Manufacturing Graded Steel Direct Laser Metal Deposition Grain Growth Electron Backscatter Diffraction (Ebsd)
Subject AreaMaterials Science, Multidisciplinary ; Physics, Applied
Funding OrganizationNational 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]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/78067
Collection中国科学院金属研究所
Corresponding AuthorWang, 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.
Recommended Citation
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.,...&Zhang, S .(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.
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