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

Guo，Chuan1,2,3; Li，Gan1,2,4; Zhou，Fan1,2; Li，Xinggang2,5; Xu，Zhen1,2; Liu，Chang1,2; Hu，Xiaogang2,5; Lu，Hongxing1,2; Li，Zhong1,2; Zhu，Qiang1,2

2023-04-01

10.1016/j.optlastec.2022.108954

OPTICS AND LASER TECHNOLOGY   Impact Factor & Quartile

0030-3992

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.

Content of boron Cracking development Laser powder bed fusion Mechanical properties Nickel-based superalloy

SCI

English

First ; Corresponding

WOS:000905605300004

ENGINEERING

2-s2.0-85146237288

Scopus

1.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.Shenzhen Key Laboratory for Additive Manufacturing of High-Performance Materials,Shenzhen,518055,China
3.CityU-Shenzhen Futian Research Institute,Shenzhen,518045,China
4.Department of Mechanical Engineering,City University of Hong Kong,Kowloon,Tat Chee Avenue,Hong Kong
5.Academy for Advanced Interdisciplinary Studies,Southern University of Science and Technology,Shenzhen,518055,China

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[J]. OPTICS AND LASER TECHNOLOGY,2023,159.

Guo，Chuan.,Li，Gan.,Zhou，Fan.,Li，Xinggang.,Xu，Zhen.,...&Zhu，Qiang.(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.

Guo，Chuan,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 159(2023).