JOHNSON-COOK FAILURE MODEL FOR ADDITIVELY MANUFACTURED 304L STAINLESS STEEL PARTS

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Date

2023

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University of Texas at Austin

Abstract

Laser powder bed fusion (LPBF) process is a type of additive manufacturing technique which uses a powder bed to form complex metal parts in a layer-by-layer process. This study aims to understand the damage initiation in the parts manufactured by LPBF process using 304L stainless steel powder, which is widely used in numerous applications. The tensile specimens were manufactured using 304LSS powder through LPBF. Tensile specimens with varying notches were tested to calibrate the parameters of the constitutive Johnson-Cook failure model. To obtain the strength parameters, the tensile tests were performed at different temperatures and strain-rates. The material model developed was used in numerical simulation of the tensile tests and compared with the experimental results.

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