Effect of γ-phase stability on local deformation energy of α-γ duplex stainless steel

Masayuki Yamamoto, Ryosuke Ochi, Kyono Yasuda, Masatoshi Aramaki, Shinji Munetoh, Osamu Furukimi

Research output: Contribution to journalArticle

Abstract

The effect of austenite (γ) phase stability in the local deformation region on the deformation energy of ferrite (α)-γ duplex stainless steel is investigated using tensile testing. The uniform deformation energy values of both the γ-stable and unstable duplex stainless steels are similar, while the local deformation energy of γ-stable duplex stainless steel is larger than that of γ-unstable duplex stainless steel. In γ-unstable duplex stainless steel, the difference in nano-indentation hardness between the α and transformed martensite (α) phases increases remarkably beneath the fractured surface. Low-voltage electron microscopy observations reveal that voids grow rapidly at the grain boundaries between the α and α phases beneath the fractured surface, resulting in a decrease in the local deformation energy in γ-unstable duplex stainless steel.

Original languageEnglish
Pages (from-to)1379-1385
Number of pages7
JournalMaterials Transactions
Volume58
Issue number10
DOIs
Publication statusPublished - Jan 1 2017

Fingerprint

Phase stability
Stainless Steel
stainless steels
Stainless steel
energy
Tensile testing
Nanoindentation
nanoindentation
austenite
martensite
Martensite
Austenite
low voltage
Electron microscopy
Ferrite
voids
ferrites
electron microscopy
Grain boundaries
hardness

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Effect of γ-phase stability on local deformation energy of α-γ duplex stainless steel. / Yamamoto, Masayuki; Ochi, Ryosuke; Yasuda, Kyono; Aramaki, Masatoshi; Munetoh, Shinji; Furukimi, Osamu.

In: Materials Transactions, Vol. 58, No. 10, 01.01.2017, p. 1379-1385.

Research output: Contribution to journalArticle

Yamamoto, Masayuki ; Ochi, Ryosuke ; Yasuda, Kyono ; Aramaki, Masatoshi ; Munetoh, Shinji ; Furukimi, Osamu. / Effect of γ-phase stability on local deformation energy of α-γ duplex stainless steel. In: Materials Transactions. 2017 ; Vol. 58, No. 10. pp. 1379-1385.
@article{07bf8bc37d304dd69515f816181c0a89,
title = "Effect of γ-phase stability on local deformation energy of α-γ duplex stainless steel",
abstract = "The effect of austenite (γ) phase stability in the local deformation region on the deformation energy of ferrite (α)-γ duplex stainless steel is investigated using tensile testing. The uniform deformation energy values of both the γ-stable and unstable duplex stainless steels are similar, while the local deformation energy of γ-stable duplex stainless steel is larger than that of γ-unstable duplex stainless steel. In γ-unstable duplex stainless steel, the difference in nano-indentation hardness between the α and transformed martensite (α) phases increases remarkably beneath the fractured surface. Low-voltage electron microscopy observations reveal that voids grow rapidly at the grain boundaries between the α and α phases beneath the fractured surface, resulting in a decrease in the local deformation energy in γ-unstable duplex stainless steel.",
author = "Masayuki Yamamoto and Ryosuke Ochi and Kyono Yasuda and Masatoshi Aramaki and Shinji Munetoh and Osamu Furukimi",
year = "2017",
month = "1",
day = "1",
doi = "10.2320/matertrans.H-M2017826",
language = "English",
volume = "58",
pages = "1379--1385",
journal = "Materials Transactions",
issn = "0916-1821",
publisher = "The Japan Institute of Metals and Materials",
number = "10",

}

TY - JOUR

T1 - Effect of γ-phase stability on local deformation energy of α-γ duplex stainless steel

AU - Yamamoto, Masayuki

AU - Ochi, Ryosuke

AU - Yasuda, Kyono

AU - Aramaki, Masatoshi

AU - Munetoh, Shinji

AU - Furukimi, Osamu

PY - 2017/1/1

Y1 - 2017/1/1

N2 - The effect of austenite (γ) phase stability in the local deformation region on the deformation energy of ferrite (α)-γ duplex stainless steel is investigated using tensile testing. The uniform deformation energy values of both the γ-stable and unstable duplex stainless steels are similar, while the local deformation energy of γ-stable duplex stainless steel is larger than that of γ-unstable duplex stainless steel. In γ-unstable duplex stainless steel, the difference in nano-indentation hardness between the α and transformed martensite (α) phases increases remarkably beneath the fractured surface. Low-voltage electron microscopy observations reveal that voids grow rapidly at the grain boundaries between the α and α phases beneath the fractured surface, resulting in a decrease in the local deformation energy in γ-unstable duplex stainless steel.

AB - The effect of austenite (γ) phase stability in the local deformation region on the deformation energy of ferrite (α)-γ duplex stainless steel is investigated using tensile testing. The uniform deformation energy values of both the γ-stable and unstable duplex stainless steels are similar, while the local deformation energy of γ-stable duplex stainless steel is larger than that of γ-unstable duplex stainless steel. In γ-unstable duplex stainless steel, the difference in nano-indentation hardness between the α and transformed martensite (α) phases increases remarkably beneath the fractured surface. Low-voltage electron microscopy observations reveal that voids grow rapidly at the grain boundaries between the α and α phases beneath the fractured surface, resulting in a decrease in the local deformation energy in γ-unstable duplex stainless steel.

UR - http://www.scopus.com/inward/record.url?scp=85030087030&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85030087030&partnerID=8YFLogxK

U2 - 10.2320/matertrans.H-M2017826

DO - 10.2320/matertrans.H-M2017826

M3 - Article

AN - SCOPUS:85030087030

VL - 58

SP - 1379

EP - 1385

JO - Materials Transactions

JF - Materials Transactions

SN - 0916-1821

IS - 10

ER -