Functionally Graded Stainless Steel Fabricated by Direct Laser Deposition: Anisotropy of Mechanical Properties and Hardness

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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.
刊名	ACTA METALLURGICA SINICA-ENGLISH LETTERS
	2018
卷号	31 期号:1 页码:19-26
关键词	Direct Metal-deposition Fracture-toughness Microstructure Ti-6al-4v Fatigue Parts Performance Alloys
ISSN号	1006-7191
英文摘要	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).; 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).
学科主题	Metallurgy & Metallurgical Engineering
语种	英语
资助机构	National 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]
公开日期	2018-06-05
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/79602]
专题	金属研究所_中国科学院金属研究所
通讯作者	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.
推荐引用方式 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.