TY - GEN
T1 - Microstructure and properties of friction stir welded 1.3wt% n containing steel
AU - Sato, Yutaka S.
AU - Nakamura, Kei
AU - Kokawa, Hiroyuki
AU - Narita, Shuji
AU - Shimizu, Tetsuya
PY - 2009
Y1 - 2009
N2 - In this study, FSW was applied to a high nitrogen steel (HNS) containing 1.3wt% nitrogen using a PCBN tool, and feasibility of FSW for HNS, and microstructure and properties of the weld were examined. FSW produced defect-free welds in the HNS at several welding parameters. The stir zone had roughly the same nitrogen content as the base material, which suggested that both the PCBN tool wear and the nitrogen desorption hardly occurred during FSW. FSW refined the grain structure in the stir zone, which resulted in the higher hardness than the base material. Simultaneously, FSW resulted in rapid formation of Cr2N precipitates on the grain boundaries in the stir zone, which caused reduction of the corrosion resistance. This study showed that FSW is an effective method to produce a defect-free weld with high hardness in the HNS, although the corrosion resistance of the stir zone is reduced.
AB - In this study, FSW was applied to a high nitrogen steel (HNS) containing 1.3wt% nitrogen using a PCBN tool, and feasibility of FSW for HNS, and microstructure and properties of the weld were examined. FSW produced defect-free welds in the HNS at several welding parameters. The stir zone had roughly the same nitrogen content as the base material, which suggested that both the PCBN tool wear and the nitrogen desorption hardly occurred during FSW. FSW refined the grain structure in the stir zone, which resulted in the higher hardness than the base material. Simultaneously, FSW resulted in rapid formation of Cr2N precipitates on the grain boundaries in the stir zone, which caused reduction of the corrosion resistance. This study showed that FSW is an effective method to produce a defect-free weld with high hardness in the HNS, although the corrosion resistance of the stir zone is reduced.
KW - Friction stir welding
KW - High nitrogen steel
KW - Microstructure
KW - Property
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M3 - Conference contribution
AN - SCOPUS:62949233190
SN - 9780873397377
T3 - TMS Annual Meeting
SP - 67
EP - 73
BT - Friction Stir Welding and Processing V - Proceedings of Symposia held during TMS 2009 Annual Meeting and Exhibition
T2 - Friction Stir Welding and Processing V -TMS 2009 Annual Meeting and Exhibition
Y2 - 15 February 2009 through 19 February 2009
ER -