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Open Access

Anisotropy of mechanical properties response on crystallographic features of GH5188 superalloy fabricated by laser powder bed fusion

Wei WEIa,b,, Xianghui ZHENGa, Xue CHENa, Yu ZHAIa, Qian CHENGa, Fengjiao GUOa, Qiong HEa, Wuli SUa, Chao ZHANGa, Hao RANa, Mingsai WANGa, Chongxiang HUANGa( )
School of Aeronautics & Astronautics, Sichuan University, Chengdu 610065, China
Yan’an Vocational & Technical College, Yan’an 716000, China

Peer review under responsibility of Editorial Committee of JAMST

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Abstract

The relationship between the crystallographic features and the anisotropic mechanical properties of a Laser Powder Bed Fusion (LPBF) fabricated GH5188 alloy were investigated. For this purpose, the LPBF-ed GH5188 alloy was subjected to a tensile test in two different tensile axis orientations, perpendicular and parallel to the building direction, which we call“horizonal”and“vertical”orientations correspondingly. The techniques of EBSD and TEM were employed to characterize the different strained samples. The results show that the LPBF-ed GH5188 alloy exhibits a <001> fiber texture with elongated grains along the building direction. Compared to the vertical samples, the horizonal samples acquire a higher Taylor factor and a higher KAM (kernel average misorientation) value during deformation, which lead to a better yield strength and a higher strain hardening rate. Furthermore, the texture of the deformed samples revealed that the horizonal samples have a better coordinated deformability, which leads to higher ductility compared to the vertical samples.

Keywords

Laser powder bed fusionGH5188 Co-base superalloyAnisotropy of mechanical propertiesCrystallographic featuresTaylor factor

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Journal of Advanced Manufacturing Science and Technology
Volume 3 Issue 4,
October 2023
DOI: 10.51393/j.jamst.2023015
Cite this article:
WEI W, ZHENG X, CHEN X, et al. Anisotropy of mechanical properties response on crystallographic features of GH5188 superalloy fabricated by laser powder bed fusion. Journal of Advanced Manufacturing Science and Technology, 2023, 3(4): 2023015. https://doi.org/10.51393/j.jamst.2023015

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Received: 15 July 2023
Revised: 10 August 2023
Accepted: 01 September 2023
Published: 15 October 2023
©2023 JAMST

This is an Open Access article distributed under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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