@article{030fe9964d4446b09c5da84b415ecab8,
title = "Hydrogen embrittlement resistance of pre-strained ultra-high-strength low alloy TRIP-aided steel",
abstract = "In the study, the pre-strain effect on hydrogen embrittlement property of the ultra-high-strength transformation-induced plasticity (TRIP)-aided bainitic ferrite (TBF) steel was investigated towards application for automobile frame parts. Specifically, 3–10% tensile pre-strain suppressed hydrogen-induced mechanical degradation relative to total elongation (pre-strain + elongation after hydrogen charging) while 12–15% pre-strained specimen did not exhibit elongation after hydrogen charging. The advantageous effect of the 3–10% pre-strain was attributed to the suppression of crack initiation related to retained austenite. Specifically, the TRIP by pre-straining decreased the volume fraction of retained austenite before hydrogen charging, thereby reducing existing probabilities of preferential crack initiation sites and propagation paths. Conversely, high pre-strain such as 12–15% does not effectively work due to work hardening resulting in increases in hydrogen embrittlement susceptibility and a significant increase in hydrogen content due to the multiplication of dislocations.",
keywords = "High-strength steels, Hydrogen embrittlement, Pre-strain, Retained austenite, TRIP-aided steel",
author = "Tomohiko Hojo and Bakuya Kumai and Motomichi Koyama and Eiji Akiyama and Hiroyuki Waki and Hiroyuki Saitoh and Ayumi Shiro and Ryo Yasuda and Takahisa Shobu and Akihiko Nagasaka",
note = "Funding Information: The study was supported by JSPS KAKENHI Grant-in-Aid for Scientific Research on Innovative Areas “Hydrogenomics”, Nos. JP18H05513 and JP18H05514 and Grant-in-Aid for Scientific Research (C), No. JP18K04743. Furthermore, the part of the study was financially supported by the Amada Foundation. Additionally, a part of this work was supported by the QST Advanced Characterization Nanotechnology Platform under the remit of “Nanotechnology Platform” of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan (Proposal Nos. A-17-QS-0024 and A-18-QS-0034). The synchrotron radiation experiments were performed using a QST experimental station at QST (JAEA) beamline BL14B1, SPring-8, with the approval of the Japan Synchrotron Radiation Research Institute (JASRI) (Proposal Nos. 2017B3681 and 2018B3681). Funding Information: The study was supported by JSPS KAKENHI Grant-in-Aid for Scientific Research on Innovative Areas ?Hydrogenomics?, Nos. JP18H05513 and JP18H05514 and Grant-in-Aid for Scientific Research (C), No. JP18K04743. Furthermore, the part of the study was financially supported by the Amada Foundation. Additionally, a part of this work was supported by the QST Advanced Characterization Nanotechnology Platform under the remit of ?Nanotechnology Platform? of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan (Proposal Nos. A-17-QS-0024 and A-18-QS-0034). The synchrotron radiation experiments were performed using a QST experimental station at QST (JAEA) beamline BL14B1, SPring-8, with the approval of the Japan Synchrotron Radiation Research Institute (JASRI) (Proposal Nos. 2017B3681 and 2018B3681). Publisher Copyright: {\textcopyright} 2020, Springer Nature B.V.",
year = "2020",
month = aug,
day = "1",
doi = "10.1007/s10704-020-00451-5",
language = "English",
volume = "224",
pages = "253--260",
journal = "International Journal of Fracture",
issn = "0376-9429",
publisher = "Springer Netherlands",
number = "2",
}