|About this Abstract
||NUMISHEET 2022: The 12th International Conference on Numerical Simulation of 3D Sheet Metal Forming Processes
||Strain Rate Dependent Hardening Behavior of Weld Metal in Laser Welded Blank with GEN3 AHSS
||Minki Kim, Jiahui Clare Gu, Hyunok Kim
|On-Site Speaker (Planned)
This paper introduces the effects of the strain rate on the hardening behavior of weld metal in laser welded blank (LWB) with GEN3 AHSS. Mini-tensile specimens were prepared from the LWB to characterize the weld properties. Tensile tests were then performed at strain rates from 0.001 to 0.1 /s which are relevant to sheet metal forming. Deformation of the specimen was measured with a digital image correlation (DIC) system to identify strain behavior. Experimental results of the base metal and the weld metal show different hardening behaviors concerning the strain rate. The hardening rate and strain rate sensitivity (SRS) of the base and the weld metals were found to be different from each other. From the calculation of the SRS, changes in the strain rate effect were confirmed. Three different hardening models were used to extrapolate the flow stress of the weld metal for a larger strain.
||Definite: At-meeting proceedings