Microstructural evolution of 304 austenitic stainless steel during friction stir welding

Hiroyuki Kokawa; Seung Hwan C. Park; Yutaka Sato; Kazutaka Okamoto; Satoshi Hirano; Masahisa Inagaki

Microstructural evolution of 304 austenitic stainless steel during friction stir welding

Hiroyuki Kokawa, Seung Hwan C. Park, Yutaka Sato, Kazutaka Okamoto, Satoshi Hirano, Masahisa Inagaki

ENG - Materials Processing

Research output: Contribution to journal › Conference article › peer-review

1 Citation (Scopus)

Abstract

Friction stir welding was applied to 304 austenitic stainless steel. The microstructural evolution and hardness distribution in the weld were investigated. The stir zone (SZ) and thermomechanically affected zone (TMAZ) showed dynamically recrystallised and recovered microstructures, respectively. The hardness of the SZ was higher than that of the base material and the maximum hardness was located in the TMAZ. The higher hardness in TMAZ was attributed to high density of dislocations and sub-grains. Electron microscopic observations revealed that ferrite and sigma phase were formed in austenite matrix in the SZ depending on the cooling rate during FSW.

Original language	English
Pages (from-to)	73-77
Number of pages	5
Journal	Proceedings of the International Offshore and Polar Engineering Conference
Publication status	Published - 2004 Dec 1
Event	The Fourteenth International Offshore and Polar Engineering Conference - ISOPE 2004 - Toulon, France Duration: 2004 May 23 → 2004 May 28

Keywords

Austenite
Ferrite
Friction stir welding
Microstructure
Recovery
Recrystallisation
Sigma
Stainless steel

ASJC Scopus subject areas

Energy Engineering and Power Technology
Ocean Engineering
Mechanical Engineering

Access to Document

Fingerprint Dive into the research topics of 'Microstructural evolution of 304 austenitic stainless steel during friction stir welding'. Together they form a unique fingerprint.

Cite this

Microstructural evolution of 304 austenitic stainless steel during friction stir welding. / Kokawa, Hiroyuki; Park, Seung Hwan C.; Sato, Yutaka; Okamoto, Kazutaka; Hirano, Satoshi; Inagaki, Masahisa.

In: Proceedings of the International Offshore and Polar Engineering Conference, 01.12.2004, p. 73-77.

Research output: Contribution to journal › Conference article › peer-review

@article{af816aacf1c14cc89b14fcebbf2eb680,

title = "Microstructural evolution of 304 austenitic stainless steel during friction stir welding",

abstract = "Friction stir welding was applied to 304 austenitic stainless steel. The microstructural evolution and hardness distribution in the weld were investigated. The stir zone (SZ) and thermomechanically affected zone (TMAZ) showed dynamically recrystallised and recovered microstructures, respectively. The hardness of the SZ was higher than that of the base material and the maximum hardness was located in the TMAZ. The higher hardness in TMAZ was attributed to high density of dislocations and sub-grains. Electron microscopic observations revealed that ferrite and sigma phase were formed in austenite matrix in the SZ depending on the cooling rate during FSW.",

keywords = "Austenite, Ferrite, Friction stir welding, Microstructure, Recovery, Recrystallisation, Sigma, Stainless steel",

author = "Hiroyuki Kokawa and Park, {Seung Hwan C.} and Yutaka Sato and Kazutaka Okamoto and Satoshi Hirano and Masahisa Inagaki",

year = "2004",

month = dec,

day = "1",

language = "English",

pages = "73--77",

journal = "Proceedings of the International Offshore and Polar Engineering Conference",

issn = "1098-6189",

publisher = "International Society of Offshore and Polar Engineers",

note = "The Fourteenth International Offshore and Polar Engineering Conference - ISOPE 2004 ; Conference date: 23-05-2004 Through 28-05-2004",

}

TY - JOUR

T1 - Microstructural evolution of 304 austenitic stainless steel during friction stir welding

AU - Kokawa, Hiroyuki

AU - Park, Seung Hwan C.

AU - Sato, Yutaka

AU - Okamoto, Kazutaka

AU - Hirano, Satoshi

AU - Inagaki, Masahisa

PY - 2004/12/1

Y1 - 2004/12/1

N2 - Friction stir welding was applied to 304 austenitic stainless steel. The microstructural evolution and hardness distribution in the weld were investigated. The stir zone (SZ) and thermomechanically affected zone (TMAZ) showed dynamically recrystallised and recovered microstructures, respectively. The hardness of the SZ was higher than that of the base material and the maximum hardness was located in the TMAZ. The higher hardness in TMAZ was attributed to high density of dislocations and sub-grains. Electron microscopic observations revealed that ferrite and sigma phase were formed in austenite matrix in the SZ depending on the cooling rate during FSW.

AB - Friction stir welding was applied to 304 austenitic stainless steel. The microstructural evolution and hardness distribution in the weld were investigated. The stir zone (SZ) and thermomechanically affected zone (TMAZ) showed dynamically recrystallised and recovered microstructures, respectively. The hardness of the SZ was higher than that of the base material and the maximum hardness was located in the TMAZ. The higher hardness in TMAZ was attributed to high density of dislocations and sub-grains. Electron microscopic observations revealed that ferrite and sigma phase were formed in austenite matrix in the SZ depending on the cooling rate during FSW.

KW - Austenite

KW - Ferrite

KW - Friction stir welding

KW - Microstructure

KW - Recovery

KW - Recrystallisation

KW - Sigma

KW - Stainless steel

UR - http://www.scopus.com/inward/record.url?scp=23844543442&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=23844543442&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:23844543442

SP - 73

EP - 77

JO - Proceedings of the International Offshore and Polar Engineering Conference

JF - Proceedings of the International Offshore and Polar Engineering Conference

SN - 1098-6189

T2 - The Fourteenth International Offshore and Polar Engineering Conference - ISOPE 2004

Y2 - 23 May 2004 through 28 May 2004

ER -