Effect of laser energy density on the microstructure, mechanical properties, and deformation of Inconel 718 samples fabricated by selective laser melting

Yi, J. H.1,2; Kang, J. W.1,2; Wang, T. J.3; Wang, X.1,2; Hu, Y. Y.1,2; Feng, T.4; Feng, Y. L.4; Wu, P. Y.4

2019-05-25

10.1016/j.jallcom.2019.01.377

JOURNAL OF ALLOYS AND COMPOUNDS   影响因子和分区

0925-8388

1873-4669

Inconel 718 samples were fabricated by selective laser melting (SLM). The effects of line laser energy densities in the range 0.1-0.3J/mm on the microstructure, mechanical properties, and deformation of these samples were investigated. The fewest pores and best mechanical properties were realized at 0.2 J/mm with a yield strength of 775 MPa, ultimate tensile strength of 1055 MPa, and elongation of 29.5%. Fine dimples were uniformly distributed on the fracture surface under 0.2 J/mm. An Electron Backscatter Diffraction (EBSD) test revealed a mixture of fine columnar and equiaxed grains that promote strength while maintaining high plasticity. The prisms cut from these samples bent outwards, indicating great residual stresses in the samples. Their deformation increased with increasing laser energy density. Therefore, stress release treatment is necessary for SLM parts. (C) 2019 Elsevier B.V. All rights reserved.

Selective laser melting Inconel 718 Laser energy density Microstructure Mechanical property Deformation

SCI ; EI

英语

其他

National Science and Technology Major Project of the Ministry of Science and Technology of China[2016YFB1100703]

Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering

Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering

WOS:000461778600058

ELSEVIER SCIENCE SA

20190606475256

3D printers ; Deformation ; Density (specific gravity) ; Fabrication ; Mechanical properties ; Melting ; Microstructure ; Tensile strength ; Textures

Printing Equipment:745.1.1 ; Chemical Operations:802.3 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Materials Science:951

MATERIALS SCIENCE

Web of Science

1.Tsinghua Univ, Minist Educ, Key Lab Adv Mat Proc Technol, Beijing 100084, Peoples R China
2.Tsinghua Univ, Sch Mat Sci & Engn, Beijing 100084, Peoples R China
3.Southern Univ Sci & Technol, Dept Mech & Energy Engn, Shenzhen 518055, Peoples R China
4.Beijing E Plus 3D Tech Co Ltd, Beijing 100023, Peoples R China

Yi, J. H.,Kang, J. W.,Wang, T. J.,et al. Effect of laser energy density on the microstructure, mechanical properties, and deformation of Inconel 718 samples fabricated by selective laser melting[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2019,786:481-488.

Yi, J. H..,Kang, J. W..,Wang, T. J..,Wang, X..,Hu, Y. Y..,...&Wu, P. Y..(2019).Effect of laser energy density on the microstructure, mechanical properties, and deformation of Inconel 718 samples fabricated by selective laser melting.JOURNAL OF ALLOYS AND COMPOUNDS,786,481-488.

Yi, J. H.,et al."Effect of laser energy density on the microstructure, mechanical properties, and deformation of Inconel 718 samples fabricated by selective laser melting".JOURNAL OF ALLOYS AND COMPOUNDS 786(2019):481-488.