TY - JOUR
T1 - Synergistic effects of hydrogen and deformation temperature on mechanical properties of TRIP-aided bainitic ferrite steel
AU - Zhou, Yutao
AU - Hojo, Tomohiko
AU - Koyama, Motomichi
AU - Ajito, Saya
AU - Akiyama, Eiji
N1 - Funding Information:
The part of this research was financially supported by The Amada Foundation , No. AF-2020002-A3 . Yutao Zhou is grateful to the China Scholarship Council (CSC) for financial support.
Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/5/11
Y1 - 2022/5/11
N2 - Mechanical properties of TRIP-aided steel with bainitic ferrite matrix in the presence of hydrogen were investigated at the deformation temperature range of −100 to 100 °C. In hydrogen-uncharged condition, the yield strength (YS) first increased and then remained almost unchanged, while the highest uniform elongation (UEl) was observed at a deformation temperature of 21 °C. Hydrogen charging slightly increased the YS and deteriorated the UEl at all the temperature ranges. In the hydrogen-uncharged and hydrogen-charged specimens, the transformation ratio of retained austenite increased with a decrease in the deformation temperature; however, the hydrogen charging decreased the transformation ratio. The fracture behavior drastically changed when hydrogen was introduced, owing to which deformation-induced martensitic transformation occurred and hydrogen played dual roles in accelerating brittle-like cracking.
AB - Mechanical properties of TRIP-aided steel with bainitic ferrite matrix in the presence of hydrogen were investigated at the deformation temperature range of −100 to 100 °C. In hydrogen-uncharged condition, the yield strength (YS) first increased and then remained almost unchanged, while the highest uniform elongation (UEl) was observed at a deformation temperature of 21 °C. Hydrogen charging slightly increased the YS and deteriorated the UEl at all the temperature ranges. In the hydrogen-uncharged and hydrogen-charged specimens, the transformation ratio of retained austenite increased with a decrease in the deformation temperature; however, the hydrogen charging decreased the transformation ratio. The fracture behavior drastically changed when hydrogen was introduced, owing to which deformation-induced martensitic transformation occurred and hydrogen played dual roles in accelerating brittle-like cracking.
KW - Deformation temperature
KW - Hydrogen embrittlement
KW - Mechanical properties
KW - TRIP-aided steel
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U2 - 10.1016/j.msea.2022.143070
DO - 10.1016/j.msea.2022.143070
M3 - Article
AN - SCOPUS:85127957475
SN - 0921-5093
VL - 842
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
M1 - 143070
ER -