[G] Mechanical Properties of Materials and Sturucture

[34] Hydrogen-assisted failure of nanotwinned 23Mn-0.5C twinning-induced plasticity steel processed by High-Pressure Torsion

*Mohammadi Abbas¹, Edalati kaveh¹, Davi　Coimbrão Diego², José　Botta Walter², Noguchi Hiroshi³ (1. WPI, International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Fukuoka 819-0395, Japan、2. Department of Materials Engineering, Federal University of São Carlos (UFSCar), São Carlos 13565-905, SP, Brazil、3. Faculty of Engineering, Kyushu University, Fukuoka 819-0395, Japan)

Keywords:Hydrogen embrittlement、Ultrafine-grained materials、Severe plastic deformation、Martensitic phase transformation、ASTAR orientation mapping

This study attempts to examine the mechanical properties of austenitic nanotwinned TWIP steel produced by high-pressure torsion (HPT) processing followed by annealing in a hydrogen atmosphere.