TY - GEN
T1 - Microstructure and mechanical properties of friction stir welded high-strength steel for drilling pipe
AU - Lee, Sangchul K.
AU - Sato, Yutaka S.
AU - Kokawa, Hiroyuki
AU - Lee, Jongsub
AU - Lee, Wonbae
AU - Cho, Minhyun
PY - 2011
Y1 - 2011
N2 - Friction stir welding (FSW) is an attractive method in welding of steels due to high energy efficiency, few solidification related defects, and reduction of distortion. In this study, microstructures and mechanical properties of FS welded P110 API-grade steel were examined. Microstructure of the stir zone (SZ) mainly consisted of the quenched martensite with low fraction of bainite, which led to very high hardness. The decrease in rotational speed could significantly reduce fraction of quenched martensite in the SZ, resulting in roughly the same hardness of the base material.
AB - Friction stir welding (FSW) is an attractive method in welding of steels due to high energy efficiency, few solidification related defects, and reduction of distortion. In this study, microstructures and mechanical properties of FS welded P110 API-grade steel were examined. Microstructure of the stir zone (SZ) mainly consisted of the quenched martensite with low fraction of bainite, which led to very high hardness. The decrease in rotational speed could significantly reduce fraction of quenched martensite in the SZ, resulting in roughly the same hardness of the base material.
KW - Drilling
KW - Friction stir welding
KW - High strength steel
KW - Mechanical properties
KW - Microstructure
KW - P110
UR - http://www.scopus.com/inward/record.url?scp=80052695260&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80052695260&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:80052695260
SN - 9781880653968
T3 - Proceedings of the International Offshore and Polar Engineering Conference
SP - 501
EP - 505
BT - Proceedings of the 21st (2011) International Offshore and Polar Engineering Conference, ISOPE-2011
T2 - 21st International Offshore and Polar Engineering Conference, ISOPE-2011
Y2 - 19 June 2011 through 24 June 2011
ER -
