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

被引：13

作者：

Guo, Chuan ^{[1
,2
,3
]}

Li, Gan ^{[1
,2
,4
]}

Zhou, Fan ^{[1
,2
]}

Li, Xinggang ^{[2
,5
]}

Liu, Chang ^{[1
,2
]}

Li, Zhong ^{[1
,2
]}

Zhu, Qiang ^{[1
,2
]}

机构：

[1] Southern Univ Sci & Technol, Dept Mech & Energy Engn, Shenzhen 518055, Peoples R China

[2] Shenzhen Key Lab Addit Mfg High Performance Mat, Shenzhen 518055, Peoples R China

[3] CityU Shenzhen Futian Res Inst, Shenzhen 518045, Peoples R China

[4] City Univ Hong Kong, Dept Mech Engn, Tat Chee Ave, Hong Kong, Peoples R China

[5] Southern Univ Sci & Technol, Acad Adv Interdisciplinary Studies, Shenzhen 518055, Peoples R China

来源：

OPTICS AND LASER TECHNOLOGY | 2023年 / 159卷

基金：

中国国家自然科学基金;

关键词：

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

D O I：

10.1016/j.optlastec.2022.108954

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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.

引用

页数：11

共 35 条

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