Effects of static and dynamic strain aging on hydrogen embrittlement in twip steels containing Al

Motomichi Koyama; Eiji Akiyama; Kaneaki Tsuzaki

doi:10.2355/tetsutohagane.100.1132

Effects of static and dynamic strain aging on hydrogen embrittlement in twip steels containing Al

Motomichi Koyama, Eiji Akiyama, Kaneaki Tsuzaki

IMR - Materials Design Division

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

Al effects on strain aging and resistance against hydrogen embrittlement were examined in Fe-18Mn-0.6C-based twinning-induced plasticity steels deformed at different strain rates. The Fe-18Mn-0.6C steel showed hydrogen-induced fracture when it had been pre-deformed at a strain rate of 1.7×10^-6s^-1. The hydrogen-induced fracture was suppressed by increasing strain rate and increasing Al content. From the viewpoint of material strengthening by strain aging, we found two important factors improving the resistance to the hydrogen embrittlement; (1) suppression of dynamic strain aging by increasing strain rate and Al content, and (2) suppression of static strain aging under loading by the Al addition.

Original language	English
Pages (from-to)	1132-1139
Number of pages	8
Journal	Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume	100
Issue number	9
DOIs	https://doi.org/10.2355/tetsutohagane.100.1132
Publication status	Published - 2014

Keywords

High strength steel
Hydrogen embrittlement
Strain aging
Tensile test
Twinning-induced plasticity

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10.2355/tetsutohagane.100.1132

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title = "Effects of static and dynamic strain aging on hydrogen embrittlement in twip steels containing Al",

abstract = "Al effects on strain aging and resistance against hydrogen embrittlement were examined in Fe-18Mn-0.6C-based twinning-induced plasticity steels deformed at different strain rates. The Fe-18Mn-0.6C steel showed hydrogen-induced fracture when it had been pre-deformed at a strain rate of 1.7×10-6s-1. The hydrogen-induced fracture was suppressed by increasing strain rate and increasing Al content. From the viewpoint of material strengthening by strain aging, we found two important factors improving the resistance to the hydrogen embrittlement; (1) suppression of dynamic strain aging by increasing strain rate and Al content, and (2) suppression of static strain aging under loading by the Al addition.",

keywords = "High strength steel, Hydrogen embrittlement, Strain aging, Tensile test, Twinning-induced plasticity",

author = "Motomichi Koyama and Eiji Akiyama and Kaneaki Tsuzaki",

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T1 - Effects of static and dynamic strain aging on hydrogen embrittlement in twip steels containing Al

AU - Koyama, Motomichi

AU - Akiyama, Eiji

AU - Tsuzaki, Kaneaki

PY - 2014

Y1 - 2014

N2 - Al effects on strain aging and resistance against hydrogen embrittlement were examined in Fe-18Mn-0.6C-based twinning-induced plasticity steels deformed at different strain rates. The Fe-18Mn-0.6C steel showed hydrogen-induced fracture when it had been pre-deformed at a strain rate of 1.7×10-6s-1. The hydrogen-induced fracture was suppressed by increasing strain rate and increasing Al content. From the viewpoint of material strengthening by strain aging, we found two important factors improving the resistance to the hydrogen embrittlement; (1) suppression of dynamic strain aging by increasing strain rate and Al content, and (2) suppression of static strain aging under loading by the Al addition.

AB - Al effects on strain aging and resistance against hydrogen embrittlement were examined in Fe-18Mn-0.6C-based twinning-induced plasticity steels deformed at different strain rates. The Fe-18Mn-0.6C steel showed hydrogen-induced fracture when it had been pre-deformed at a strain rate of 1.7×10-6s-1. The hydrogen-induced fracture was suppressed by increasing strain rate and increasing Al content. From the viewpoint of material strengthening by strain aging, we found two important factors improving the resistance to the hydrogen embrittlement; (1) suppression of dynamic strain aging by increasing strain rate and Al content, and (2) suppression of static strain aging under loading by the Al addition.

KW - High strength steel

KW - Hydrogen embrittlement

KW - Strain aging

KW - Tensile test

KW - Twinning-induced plasticity

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Effects of static and dynamic strain aging on hydrogen embrittlement in twip steels containing Al

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