TY - JOUR
T1 - Understanding the significant effect of boron content on the printability of IN738LC superalloy fabricated using laser powder bed fusion
AU - Guo, Chuan
AU - Li, Gan
AU - Zhou, Fan
AU - Li, Xinggang
AU - Xu, Zhen
AU - Liu, Chang
AU - Hu, Xiaogang
AU - Lu, Hongxing
AU - Li, Zhong
AU - Zhu, Qiang
PY - 2023/4
Y1 - 2023/4
N2 - 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.
AB - 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.
KW - Laser powder bed fusion
KW - Nickel-based superalloy
KW - Content of boron
KW - Cracking development
KW - Mechanical properties
KW - DUCTILITY-DIP-CRACKING
KW - HOT-CRACKING
KW - INCONEL 625
KW - MICROSTRUCTURE
KW - MECHANISM
KW - LIQUATION
UR - http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=LinksAMR&SrcApp=PARTNER_APP&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000905605300004
U2 - 10.1016/j.optlastec.2022.108954
DO - 10.1016/j.optlastec.2022.108954
M3 - RGC 21 - Publication in refereed journal
SN - 0030-3992
VL - 159
JO - Optics and Laser Technology
JF - Optics and Laser Technology
M1 - 108954
ER -
