Understanding the significant effect of boron content on the printability of IN738LC superalloy fabricated using laser powder bed fusion

Chuan Guo; Gan Li; Fan Zhou; Xinggang Li; Zhen Xu; Chang Liu; Xiaogang Hu; Hongxing Lu; Zhong Li; Qiang Zhu

doi:10.1016/j.optlastec.2022.108954

Author(s)

Chuan Guo
Fan Zhou
Xinggang Li
Zhen Xu
Chang Liu
Xiaogang Hu
Hongxing Lu
Zhong Li
Qiang Zhu

Related Research Unit(s)

Department of Mechanical Engineering

Detail(s)

Original language	English
Article number	108954
Journal / Publication	Optics and Laser Technology
Volume	159
Online published	29 Nov 2022
Publication status	Published - Apr 2023

Link(s)

DOI	DOI https://doi.org/10.1016/j.optlastec.2022.108954 Final Published version
	Check@CityULib
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-85146237288&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(936a0516-d2c1-4b2e-a1c7-5fcf212c3ce2).html

Abstract

This study intends to investigate the effect of boron on the cracking behavior of Inconel738LC during laser powder bed fusion, which has been rarely reported in previous literature. 2 batches of Inconel738LC powders with different contents of boron are selected to fabricate parts. More cracks are detected in the sample fabricated by the powders with a high content of boron compared to the low-content-boron powders. The formation of boride is confirmed through transmission electron microscope, atom probe tomography and Thermo-Calc calculation, leading to solidification cracking at the final stage of solidification. In addition, the cracks tend to occur at the grain boundaries with high misorientation angles. Significant enhancement in the mechanical performance is achieved with the marked decrease of the boron due to a low level of cracking in the samples.

Research Area(s)

Laser powder bed fusion, Nickel-based superalloy, Content of boron, Cracking development, Mechanical properties, DUCTILITY-DIP-CRACKING, HOT-CRACKING, INCONEL 625, MICROSTRUCTURE, MECHANISM, LIQUATION

Citation Format(s)

[ RIS ] [ BibTeX ]

Understanding the significant effect of boron content on the printability of IN738LC superalloy fabricated using laser powder bed fusion. / Guo, Chuan; Li, Gan; Zhou, Fan et al.
In: Optics and Laser Technology, Vol. 159, 108954, 04.2023.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review

Guo, C, Li, G, Zhou, F, Li, X, Xu, Z, Liu, C, Hu, X, Lu, H, Li, Z & Zhu, Q 2023, 'Understanding the significant effect of boron content on the printability of IN738LC superalloy fabricated using laser powder bed fusion', Optics and Laser Technology, vol. 159, 108954. https://doi.org/10.1016/j.optlastec.2022.108954

Guo, C., Li, G., Zhou, F., Li, X., Xu, Z., Liu, C., Hu, X., Lu, H., Li, Z., & Zhu, Q. (2023). Understanding the significant effect of boron content on the printability of IN738LC superalloy fabricated using laser powder bed fusion. Optics and Laser Technology, 159, Article 108954. Advance online publication. https://doi.org/10.1016/j.optlastec.2022.108954

Guo C, Li G, Zhou F, Li X, Xu Z, Liu C et al. Understanding the significant effect of boron content on the printability of IN738LC superalloy fabricated using laser powder bed fusion. Optics and Laser Technology. 2023 Apr;159:108954. Epub 2022 Nov 29. doi: 10.1016/j.optlastec.2022.108954

Guo, Chuan ; Li, Gan ; Zhou, Fan et al. / Understanding the significant effect of boron content on the printability of IN738LC superalloy fabricated using laser powder bed fusion. In: Optics and Laser Technology. 2023 ; Vol. 159.