TY - JOUR
T1 - Strain-rate sensitivity of hydrogen-assisted damage evolution and failure in dual-phase steel
T2 - From vacancy to micrometer-scale void growth
AU - Kumamoto, T.
AU - Koyama, M.
AU - Sato, K.
AU - Tsuzaki, K.
N1 - Funding Information:
MK and KT acknowledge the financial supports by JSPS KAKENHI ( JP16H06365 and JP17H04956 ) and the Japan Science and Technology Agency (JST) (grant number: 20100113 ) under the Industry-Academia Collaborative R&D Program.
Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2019/7
Y1 - 2019/7
N2 - Micro-damage quantification and associated microstructure characterization in a ferrite/martensite dual-phase (DP) steel were performed after tensile tests with different strain rates of 10−2 and 10−4 s−1 in order to understand the strain rate sensitivity of damage initiation resistance and damage arrestability. The results indicated the following two conclusions: (1) The damage nucleation rate at martensite increases with decreasing strain rate, and (2) lowering strain rate reduced the critical strain for fracture by shortening the damage arrest regime. However, the failure mode was ductile manner at both of the strain rates.
AB - Micro-damage quantification and associated microstructure characterization in a ferrite/martensite dual-phase (DP) steel were performed after tensile tests with different strain rates of 10−2 and 10−4 s−1 in order to understand the strain rate sensitivity of damage initiation resistance and damage arrestability. The results indicated the following two conclusions: (1) The damage nucleation rate at martensite increases with decreasing strain rate, and (2) lowering strain rate reduced the critical strain for fracture by shortening the damage arrest regime. However, the failure mode was ductile manner at both of the strain rates.
UR - http://www.scopus.com/inward/record.url?scp=85067179984&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85067179984&partnerID=8YFLogxK
U2 - 10.1016/j.engfracmech.2019.106513
DO - 10.1016/j.engfracmech.2019.106513
M3 - Article
AN - SCOPUS:85067179984
SN - 0013-7944
VL - 216
JO - Engineering Fracture Mechanics
JF - Engineering Fracture Mechanics
M1 - 106513
ER -