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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
发表期刊ACTA METALLURGICA SINICA-ENGLISH LETTERS
ISSN1006-7191
卷号31期号:1页码:19-26
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).
部门归属[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
关键词Direct Metal-deposition Fracture-toughness Microstructure Ti-6al-4v Fatigue Parts Performance Alloys
学科领域Metallurgy & Metallurgical Engineering
资助者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]
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/79602
专题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.
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