Functional Nano Structure Materials Lab. Publication

International Journal

Temperature-Dependent Charpy Impact Property of 3D Printed 15-5 Stainless Steel
Journal
Taylor and Francis Online
Author
Sugrim sagar, Yi Zhang, Hyun-Hee Choi, Yeon-Gil Jung, Jing Zhang
Year
2021
Date
2021.02.11
File
Temperature-Dependent Charpy Impact Property of 3D Printed 15-5 Stainless Steel.pdf (2.0M) 3회 다운로드 DATE : 2021-11-29 14:48:25
In this study, the impact property of 3D printed 15-5 PH stainless steel was investigated at low (77 K), room (298 K), and high temperatures (723 K) using integrated experimental and modelling studies. The finite element model was based on the Johnson-Cook phenomenological material model and fracture parameters. The experimentally measured impact energies are 0.01, 6.78 ± 4.07, and 50.84 ± 3.39 J cm−2, at the low, room, and high temperatures, respectively. The experimental and modelling predicted impact energies are in good agreement. The microstructures show that the steel exhibits a brittle behaviour at low and room temperatures as indicated by a transgranular fracture, but changes to a more ductile behaviour at high temperatures as illustrated by microvoid coalescence induced facture morphology.