Effect of contamination on microstructure in friction stir spot welded DP590 steel

R. Ohashi; M. Fujimoto; S. Mironov; Y. S. Sato; H. Kokawa

doi:10.1179/136217108X388642

Effect of contamination on microstructure in friction stir spot welded DP590 steel

R. Ohashi, M. Fujimoto, S. Mironov, Y. S. Sato, H. Kokawa

ENG - Materials Processing

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

60 Citations (Scopus)

Abstract

In this study, FSSW of DP590 steel was performed using both bare and TiC/TiN coated Si₃N₄ tool with Ar shielding, and effect of contamination on the microstructure during FSSW was examined. Defect free welds were successfully obtained at all welding conditions. Si, N and O contaminations were clearly found in the weld when bare Si₃N₄ tool was used without Ar shielding, but the coated tool and Ar shielding could suppress the contaminations. The contaminations caused higher hardness in the vicinity of the pin hole and reduced the weld strength. The present study showed that the prevention of the contaminations could improve the weld strength, especially the cross-tension strength, in FSSW of DP590 steel using Si₃N₄ tool.

Original language	English
Pages (from-to)	221-227
Number of pages	7
Journal	Science and Technology of Welding and Joining
Volume	14
Issue number	3
DOIs	https://doi.org/10.1179/136217108X388642
Publication status	Published - 2009 Apr

Keywords

DP590 steel
Friction stir spot welding
Hardness
Joint strength
Microstructure

Access to Document

10.1179/136217108X388642

Cite this

@article{696c6865c0494dffa86cc02106ce1373,

title = "Effect of contamination on microstructure in friction stir spot welded DP590 steel",

abstract = "In this study, FSSW of DP590 steel was performed using both bare and TiC/TiN coated Si3N4 tool with Ar shielding, and effect of contamination on the microstructure during FSSW was examined. Defect free welds were successfully obtained at all welding conditions. Si, N and O contaminations were clearly found in the weld when bare Si3N4 tool was used without Ar shielding, but the coated tool and Ar shielding could suppress the contaminations. The contaminations caused higher hardness in the vicinity of the pin hole and reduced the weld strength. The present study showed that the prevention of the contaminations could improve the weld strength, especially the cross-tension strength, in FSSW of DP590 steel using Si3N4 tool.",

keywords = "DP590 steel, Friction stir spot welding, Hardness, Joint strength, Microstructure",

author = "R. Ohashi and M. Fujimoto and S. Mironov and Sato, {Y. S.} and H. Kokawa",

year = "2009",

month = apr,

doi = "10.1179/136217108X388642",

language = "English",

volume = "14",

pages = "221--227",

journal = "Science and Technology of Welding and Joining",

issn = "1362-1718",

publisher = "Maney Publishing",

number = "3",

}

TY - JOUR

T1 - Effect of contamination on microstructure in friction stir spot welded DP590 steel

AU - Ohashi, R.

AU - Fujimoto, M.

AU - Mironov, S.

AU - Sato, Y. S.

AU - Kokawa, H.

PY - 2009/4

Y1 - 2009/4

N2 - In this study, FSSW of DP590 steel was performed using both bare and TiC/TiN coated Si3N4 tool with Ar shielding, and effect of contamination on the microstructure during FSSW was examined. Defect free welds were successfully obtained at all welding conditions. Si, N and O contaminations were clearly found in the weld when bare Si3N4 tool was used without Ar shielding, but the coated tool and Ar shielding could suppress the contaminations. The contaminations caused higher hardness in the vicinity of the pin hole and reduced the weld strength. The present study showed that the prevention of the contaminations could improve the weld strength, especially the cross-tension strength, in FSSW of DP590 steel using Si3N4 tool.

AB - In this study, FSSW of DP590 steel was performed using both bare and TiC/TiN coated Si3N4 tool with Ar shielding, and effect of contamination on the microstructure during FSSW was examined. Defect free welds were successfully obtained at all welding conditions. Si, N and O contaminations were clearly found in the weld when bare Si3N4 tool was used without Ar shielding, but the coated tool and Ar shielding could suppress the contaminations. The contaminations caused higher hardness in the vicinity of the pin hole and reduced the weld strength. The present study showed that the prevention of the contaminations could improve the weld strength, especially the cross-tension strength, in FSSW of DP590 steel using Si3N4 tool.

KW - DP590 steel

KW - Friction stir spot welding

KW - Hardness

KW - Joint strength

KW - Microstructure

UR - http://www.scopus.com/inward/record.url?scp=68249106608&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=68249106608&partnerID=8YFLogxK

U2 - 10.1179/136217108X388642

DO - 10.1179/136217108X388642

M3 - Article

AN - SCOPUS:68249106608

SN - 1362-1718

VL - 14

SP - 221

EP - 227

JO - Science and Technology of Welding and Joining

JF - Science and Technology of Welding and Joining

IS - 3

ER -

Effect of contamination on microstructure in friction stir spot welded DP590 steel

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this