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

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

doi:10.1016/j.scriptamat.2017.07.017

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

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

Strength of materials

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

21 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 language	English
Pages (from-to)	20-23
Number of pages	4
Journal	Scripta Materialia
Volume	141
DOIs	https://doi.org/10.1016/j.scriptamat.2017.07.017
Publication status	Published - Dec 2017

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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10.1016/j.scriptamat.2017.07.017

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title = "Room-temperature blue brittleness of Fe-Mn-C austenitic steels",

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.",

author = "Motomichi Koyama and Yusaku Shimomura and Aya Chiba and Eiji Akiyama and Kaneaki Tsuzaki",

year = "2017",

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language = "English",

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T1 - Room-temperature blue brittleness of Fe-Mn-C austenitic steels

AU - Koyama, Motomichi

AU - Shimomura, Yusaku

AU - Chiba, Aya

AU - Akiyama, Eiji

AU - Tsuzaki, Kaneaki

PY - 2017/12

Y1 - 2017/12

N2 - 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.

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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