EFFECTS OF STACKING FAULT PRECIPITATION OF NbC ON HOT DEFORMATION OF AUSTENITIC STAINLESS STEEL.

Kazuhito Kamei, Yasuhiro Maehara, Yasuya Ohmori

Research output: Contribution to journalArticle

Abstract

Hot deformation of Nb-bearing austenitic stainless steel has been studied at temperatures from 823 to 1 173 K at an initial strain rate of 2. 1 multiplied by 10** minus 4 s** minus **1. Although yield strength of the solution-treated specimen was low, work hardening occurred at 1 023 to 1 123 K. A large ductility trough accompanied by intergranular ductile fracture is explained in terms of dynamic precipitation of NbC within the grains as well as on grain boundaries. In the aged specimen, yield strength was larger and work hardening was less significant. High strength is explained in terms of small grains formed by stacking faults where NbC particles precipitated. Above 1 123 K ductility of the solution-treated specimen increased with increasing deformation temperature, but that of the aged specimen was reduced. Ductility loss is ascribed to crack formation along coherent twin boundaries.

Original languageEnglish
Pages (from-to)978-985
Number of pages8
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume71
Issue number8
Publication statusPublished - 1985 Jun
Externally publishedYes

Fingerprint

Hot working
austenitic stainless steels
Stacking faults
Austenitic stainless steel
crystal defects
Ductility
ductility
Strain hardening
Yield stress
work hardening
Bearings (structural)
yield strength
Ductile fracture
Crack initiation
Strain rate
crack initiation
Grain boundaries
high strength
troughs
hardening

ASJC Scopus subject areas

  • Metals and Alloys

Cite this

EFFECTS OF STACKING FAULT PRECIPITATION OF NbC ON HOT DEFORMATION OF AUSTENITIC STAINLESS STEEL. / Kamei, Kazuhito; Maehara, Yasuhiro; Ohmori, Yasuya.

In: Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan, Vol. 71, No. 8, 06.1985, p. 978-985.

Research output: Contribution to journalArticle

@article{865a617706e143859b401bb3fcbdfc6d,
title = "EFFECTS OF STACKING FAULT PRECIPITATION OF NbC ON HOT DEFORMATION OF AUSTENITIC STAINLESS STEEL.",
abstract = "Hot deformation of Nb-bearing austenitic stainless steel has been studied at temperatures from 823 to 1 173 K at an initial strain rate of 2. 1 multiplied by 10** minus 4 s** minus **1. Although yield strength of the solution-treated specimen was low, work hardening occurred at 1 023 to 1 123 K. A large ductility trough accompanied by intergranular ductile fracture is explained in terms of dynamic precipitation of NbC within the grains as well as on grain boundaries. In the aged specimen, yield strength was larger and work hardening was less significant. High strength is explained in terms of small grains formed by stacking faults where NbC particles precipitated. Above 1 123 K ductility of the solution-treated specimen increased with increasing deformation temperature, but that of the aged specimen was reduced. Ductility loss is ascribed to crack formation along coherent twin boundaries.",
author = "Kazuhito Kamei and Yasuhiro Maehara and Yasuya Ohmori",
year = "1985",
month = "6",
language = "English",
volume = "71",
pages = "978--985",
journal = "Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan",
issn = "0021-1575",
publisher = "Iron and Steel Institute of Japan",
number = "8",

}

TY - JOUR

T1 - EFFECTS OF STACKING FAULT PRECIPITATION OF NbC ON HOT DEFORMATION OF AUSTENITIC STAINLESS STEEL.

AU - Kamei, Kazuhito

AU - Maehara, Yasuhiro

AU - Ohmori, Yasuya

PY - 1985/6

Y1 - 1985/6

N2 - Hot deformation of Nb-bearing austenitic stainless steel has been studied at temperatures from 823 to 1 173 K at an initial strain rate of 2. 1 multiplied by 10** minus 4 s** minus **1. Although yield strength of the solution-treated specimen was low, work hardening occurred at 1 023 to 1 123 K. A large ductility trough accompanied by intergranular ductile fracture is explained in terms of dynamic precipitation of NbC within the grains as well as on grain boundaries. In the aged specimen, yield strength was larger and work hardening was less significant. High strength is explained in terms of small grains formed by stacking faults where NbC particles precipitated. Above 1 123 K ductility of the solution-treated specimen increased with increasing deformation temperature, but that of the aged specimen was reduced. Ductility loss is ascribed to crack formation along coherent twin boundaries.

AB - Hot deformation of Nb-bearing austenitic stainless steel has been studied at temperatures from 823 to 1 173 K at an initial strain rate of 2. 1 multiplied by 10** minus 4 s** minus **1. Although yield strength of the solution-treated specimen was low, work hardening occurred at 1 023 to 1 123 K. A large ductility trough accompanied by intergranular ductile fracture is explained in terms of dynamic precipitation of NbC within the grains as well as on grain boundaries. In the aged specimen, yield strength was larger and work hardening was less significant. High strength is explained in terms of small grains formed by stacking faults where NbC particles precipitated. Above 1 123 K ductility of the solution-treated specimen increased with increasing deformation temperature, but that of the aged specimen was reduced. Ductility loss is ascribed to crack formation along coherent twin boundaries.

UR - http://www.scopus.com/inward/record.url?scp=0022082094&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0022082094&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0022082094

VL - 71

SP - 978

EP - 985

JO - Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan

JF - Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan

SN - 0021-1575

IS - 8

ER -