Room-temperature blue brittleness of Fe-Mn-C austenitic steels

Motomichi Koyama, Yusaku Shimomura, Aya Chiba, Eiji Akiyama, Kaneaki Tsuzaki

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Fe-33Mn-xC (x = 0, 0.3, 0.6, 0.8, and 1.1 mass%) fully austenitic steels showed ductility degradation owing to dynamic strain aging (DSA). The elongation increased with increasing carbon concentration at a strain rate of 10− 2 s− 1. However, in the steels with carbon contents of 0.6%, 0.8%, and 1.1%, the elongation decreased with increasing carbon concentration at a strain rate of 10− 5 s− 1 where the DAS effect is distinct. Although all specimens showed ductile fracture with the formation of dimples, the work hardening-true stress relation of the Fe-33Mn-1.1C steel demonstrated fracture before satisfying Considère's criterion even at high strain rates.

Original languageEnglish
Pages (from-to)20-23
Number of pages4
JournalScripta Materialia
Volume141
DOIs
Publication statusPublished - Dec 1 2017

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brittleness
Austenitic steel
Brittleness
strain rate
Carbon steel
Strain rate
Carbon
amsonic acid
Steel
steels
elongation
Elongation
carbon
room temperature
precipitation hardening
work hardening
Ductile fracture
ductility
Strain hardening
Temperature

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Room-temperature blue brittleness of Fe-Mn-C austenitic steels. / Koyama, Motomichi; Shimomura, Yusaku; Chiba, Aya; Akiyama, Eiji; Tsuzaki, Kaneaki.

In: Scripta Materialia, Vol. 141, 01.12.2017, p. 20-23.

Research output: Contribution to journalArticle

Koyama, Motomichi ; Shimomura, Yusaku ; Chiba, Aya ; Akiyama, Eiji ; Tsuzaki, Kaneaki. / Room-temperature blue brittleness of Fe-Mn-C austenitic steels. In: Scripta Materialia. 2017 ; Vol. 141. pp. 20-23.
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abstract = "Fe-33Mn-xC (x = 0, 0.3, 0.6, 0.8, and 1.1 mass{\%}) fully austenitic steels showed ductility degradation owing to dynamic strain aging (DSA). The elongation increased with increasing carbon concentration at a strain rate of 10− 2 s− 1. However, in the steels with carbon contents of 0.6{\%}, 0.8{\%}, and 1.1{\%}, the elongation decreased with increasing carbon concentration at a strain rate of 10− 5 s− 1 where the DAS effect is distinct. Although all specimens showed ductile fracture with the formation of dimples, the work hardening-true stress relation of the Fe-33Mn-1.1C steel demonstrated fracture before satisfying Consid{\`e}re's criterion even at high strain rates.",
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AU - Tsuzaki, Kaneaki

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AB - Fe-33Mn-xC (x = 0, 0.3, 0.6, 0.8, and 1.1 mass%) fully austenitic steels showed ductility degradation owing to dynamic strain aging (DSA). The elongation increased with increasing carbon concentration at a strain rate of 10− 2 s− 1. However, in the steels with carbon contents of 0.6%, 0.8%, and 1.1%, the elongation decreased with increasing carbon concentration at a strain rate of 10− 5 s− 1 where the DAS effect is distinct. Although all specimens showed ductile fracture with the formation of dimples, the work hardening-true stress relation of the Fe-33Mn-1.1C steel demonstrated fracture before satisfying Considère's criterion even at high strain rates.

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