Research on the Laser Powder Bed Fusion Process of Fe-based Bulk Amorphous Alloys
There is a serious challenge to fabricate the large and complex Fe-based amorphous alloy,due to the harsh forming conditions of amorphous alloys.The orthogonal experimental method was employed to investigate the effects of process parameters,such as laser power,scanning speed,and scanning spacing on the forming quality of Fe55Cr25Mo16C2B2 amorphous alloys in this study.The optimized process parameters were obtained,and the mechanism of crack formation of Fe-based amorphous alloys in the laser powder bed fusion(LPBF)process was studied.The microhardness,amorphous rate,compressive properties,and fracture micromorphology of Fe-based amorphous alloys prepared by different process parameters were tested.It was found that the Fe55Cr25Mo16C2B2 amorphous alloys prepared with the optimal process parameters exhibits a high microhardness,however,the defects such as pores and cracks,and the crystallization phenomena still existed.
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