Mechanical properties and microstructure evolution of 17-4 PH stainless steel processed by laser-powered bed fusion.

Laser-Powder Bed Fusion;17-4 PH Stainless Steel;Mechanical Properties;Microstructures;Water-Atomized

Harish Irrinki

University:University of Louisville

Department:Mechanical Engineering

关键词: Laser-Powder Bed Fusion;    17-4 PH Stainless Steel;    Mechanical Properties;    Microstructures;    Water-Atomized;   

Others  :  https://ir.library.louisville.edu/cgi/viewcontent.cgi?article=3481&context=etd

美国|英语

来源: The Universite of Louisville's Institutional Repository

【 摘 要 】

Laser powder bed fusion (L-PBF) is a potential manufacturing route for the production of tooling using different steel materials. However, there is a limited understanding of how the mechanical properties and microstructures of the L-PBF produced parts vary with change in powder type and process conditions. The current research studied the influence of L-PBF process parameters on mechanical properties and microstructures of 17-4PH stainless steel using gas and water-atomized powders. The results demonstrate the feasibility of using water-atomized powders as starting raw materials instead of typically used gas-atomized powders to fabricate parts in the L-PBF process at high energy densities.