Heterogeneous Aspects of Additive Manufactured Metallic Parts: A Review

被引:134
作者
Karthik, G. M. [1 ]
Kim, Hyoung Seop [2 ]
机构
[1] Pohang Univ Sci & Technol POSTECH, Dept Mat Sci & Engn, Pohang 37673, South Korea
[2] Pohang Univ Sci & Technol POSTECH, Grad Inst Ferrous Technol, Pohang 37673, South Korea
基金
新加坡国家研究基金会;
关键词
Metal additive manufacturing; Selective laser melting; Direct energy deposition; Electron beam melting; Microstructure; Heat treatment; HIGH-ENTROPY ALLOY; AUSTENITIC STAINLESS-STEEL; LASER MELTING MICROSTRUCTURE; MECHANICAL-PROPERTIES; RESIDUAL-STRESS; HEAT-TREATMENT; MARAGING-STEEL; HIGH-STRENGTH; CRYSTALLOGRAPHIC TEXTURE; TENSILE PROPERTIES;
D O I
10.1007/s12540-020-00931-2
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Metal additive manufacturing (MAM) is an emerging technology to produce complex end-use metallic parts. To adopt MAM for manufacturing numerous engineering parts used in critical applications, a thorough understanding of the relationship between the complex thermal cycles in MAM and the unique heterogeneous microstructures of MAM parts need to be established. This review article provides a comprehensive overview of the evolution of heterogeneous microstructures in MAM parts, including melt pool boundaries, heterogeneous grain structure, sub-grain cellular structure, matrix supersaturation, segregation, phase transformation, oxides formation, and texture. The evolution of residual stresses and the anisotropy in MAM parts and the post-MAM heat treatment effects on the microstructural evolution are also discussed. This review covers the microstructural aspects of most engineering materials in particular steels, high entropy alloys, aluminum alloys, titanium alloys, nickel-base superalloys, and copper alloys, with a primary focus on the parts manufactured using selective laser melting, direct energy deposition, and electron beam melting processes.
引用
收藏
页码:1 / 39
页数:39
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