[G] Fundamentals of Mechanical Properties

2:35 PM - 2:50 PM JST(5:35 AM - 5:50 AM UTC)

[179] Super ductile steel via sequentially activating different strengthening mechanisms

○Yuanhong LIU¹, Si Gao¹, Myeong-heom Park¹, Nobuhiro Tsuji¹ (1. Kyoto Univ.)

Keywords:

Super-ductile steel,Sequential activation of deformation mechanisms,Deformation twinning,Deformation-induced martensitic transformation,Strain hardening

A super-ductile steel with 140% uniform elongation and 880 MPa tensile strength was achieved through sequential activation of dislocation slip, deformation twinning, and deformation-induced martensitic transformation. The deformation behavior was investigated by in-situ synchrotron XRD, ECCI, EBSD, and TEM.