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Functionally Graded Stainless Steel Fabricated by Direct Laser Deposition: Anisotropy of Mechanical Properties and Hardness
Wang, Q; Zhang, S; Zhang, CH; Wu, CL; Ren, L; Wang, JQ; Chen, J; Wang, Q (reprint author), China Med Univ, Sch Stomatol, Shenyang 110002, Liaoning, Peoples R China.; Wang, Q (reprint author), Shenyang Univ Technol, Sch Mat Sci & Engn, Shenyang 110870, Liaoning, Peoples R China.; Wang, Q (reprint author), Shenyang Dalu Laser Grp Co Ltd, Shenyang 110002, Liaoning, Peoples R China.
2018
Source PublicationACTA METALLURGICA SINICA-ENGLISH LETTERS
ISSN1006-7191
Volume31Issue:1Pages:19-26
AbstractDirect laser metal deposition is a kind of advanced rapid manufacturing technology, which can produce near net shape parts by depositing metal powders layer by layer. This study demonstrates fabrication, the anisotropy of mechanical properties and hardness of a graded steel. The characteristics of constituent phases, microstructure, mechanical anisotropy, and microhardness were investigated using electron backscatter diffraction, optical microscopy, tensile test machine, and microhardness tester. It was found that the graded steel is dense and free of cracks. The crystal structures of the as-built samples evolved in three grades from fcc structures to fcc ? bcc structures and then to bcc ? fcc structures. Samples in x and z directions showed obvious mechanical anisotropy. The samples machined in x direction showed higher strength and lower elongation than those machined in z direction due to the presence of lack-of-fusion pores and the higher metallurgical bonding between layers in the x direction. The microhardness of the as-built samples increased along the cross section from the substrate (159.7 HV) to the top surface (545.4 HV).; Direct laser metal deposition is a kind of advanced rapid manufacturing technology, which can produce near net shape parts by depositing metal powders layer by layer. This study demonstrates fabrication, the anisotropy of mechanical properties and hardness of a graded steel. The characteristics of constituent phases, microstructure, mechanical anisotropy, and microhardness were investigated using electron backscatter diffraction, optical microscopy, tensile test machine, and microhardness tester. It was found that the graded steel is dense and free of cracks. The crystal structures of the as-built samples evolved in three grades from fcc structures to fcc ? bcc structures and then to bcc ? fcc structures. Samples in x and z directions showed obvious mechanical anisotropy. The samples machined in x direction showed higher strength and lower elongation than those machined in z direction due to the presence of lack-of-fusion pores and the higher metallurgical bonding between layers in the x direction. The microhardness of the as-built samples increased along the cross section from the substrate (159.7 HV) to the top surface (545.4 HV).
description.department[wang, qiang] china med univ, sch stomatol, shenyang 110002, liaoning, peoples r china ; [wang, qiang ; zhang, song ; zhang, chun-hua ; wu, chen-liang] shenyang univ technol, sch mat sci & engn, shenyang 110870, liaoning, peoples r china ; [wang, qiang ; chen, jiang] shenyang dalu laser grp co ltd, shenyang 110002, liaoning, peoples r china ; [ren, ling ; wang, jian-qiang] chinese acad sci, inst met res, shenyang 110016, liaoning, peoples r china
KeywordDirect Metal-deposition Fracture-toughness Microstructure Ti-6al-4v Fatigue Parts Performance Alloys
Subject AreaMetallurgy & Metallurgical Engineering
Funding OrganizationNational Key Research and Development Program of China [2016YFB1100204, 2013ZX06002-002]; Shenyang Science and Technology [17-29-2-00, Y17-1-031, Z17-2-002]; 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/321006/79602
Collection中国科学院金属研究所
Corresponding AuthorWang, Q (reprint author), China Med Univ, Sch Stomatol, Shenyang 110002, Liaoning, Peoples R China.; Wang, Q (reprint author), Shenyang Univ Technol, Sch Mat Sci & Engn, Shenyang 110870, Liaoning, Peoples R China.; Wang, Q (reprint author), Shenyang Dalu Laser Grp Co Ltd, Shenyang 110002, Liaoning, Peoples R China.
Recommended Citation
GB/T 7714
Wang, Q,Zhang, S,Zhang, CH,et al. Functionally Graded Stainless Steel Fabricated by Direct Laser Deposition: Anisotropy of Mechanical Properties and Hardness[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2018,31(1):19-26.
APA Wang, Q.,Zhang, S.,Zhang, CH.,Wu, CL.,Ren, L.,...&Wang, Q .(2018).Functionally Graded Stainless Steel Fabricated by Direct Laser Deposition: Anisotropy of Mechanical Properties and Hardness.ACTA METALLURGICA SINICA-ENGLISH LETTERS,31(1),19-26.
MLA Wang, Q,et al."Functionally Graded Stainless Steel Fabricated by Direct Laser Deposition: Anisotropy of Mechanical Properties and Hardness".ACTA METALLURGICA SINICA-ENGLISH LETTERS 31.1(2018):19-26.
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