TY - JOUR
T1 - Microscopic observation of precipitation behavior at friction stirring zone of super duplex stainless steel
AU - Sugimoto, Itto
AU - Park, Seung Hwan C.
AU - Hirano, Satoshi
AU - Saito, Hikaru
AU - Hata, Satoshi
N1 - Publisher Copyright:
© 2019 The Japan Institute of Metals and Materials
PY - 2019
Y1 - 2019
N2 - To investigate the precipitation behavior of super duplex stainless steel in its weld by friction stir welding (FSW) at a low welding speed, we carried out microstructural observation and analysis. An intermetallic compound phase, ·, was observed in the heat affected zone (HAZ). The · phase precipitated at the interfaces between ¤-Fe (ferrite) and £ -Fe (austenite) grains 12 mm away from the stir zone (SZ)/HAZ boundary. On the other hand, the Cr2N was observed together with the belt-like £ -Fe grain aggregates in the vicinity of the advancing side (AS) of the SZ. The other intermetallic phase,», was also observed at a triple junction of £ -Fe grains. This demonstrates that the precipitation of the Cr2N and» phases correlates with the transformation of ¤-Fe to £A-Fe (secondary austenite).
AB - To investigate the precipitation behavior of super duplex stainless steel in its weld by friction stir welding (FSW) at a low welding speed, we carried out microstructural observation and analysis. An intermetallic compound phase, ·, was observed in the heat affected zone (HAZ). The · phase precipitated at the interfaces between ¤-Fe (ferrite) and £ -Fe (austenite) grains 12 mm away from the stir zone (SZ)/HAZ boundary. On the other hand, the Cr2N was observed together with the belt-like £ -Fe grain aggregates in the vicinity of the advancing side (AS) of the SZ. The other intermetallic phase,», was also observed at a triple junction of £ -Fe grains. This demonstrates that the precipitation of the Cr2N and» phases correlates with the transformation of ¤-Fe to £A-Fe (secondary austenite).
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U2 - 10.2320/matertrans.M2019069
DO - 10.2320/matertrans.M2019069
M3 - Article
AN - SCOPUS:85071508109
SN - 1345-9678
VL - 60
SP - 2003
EP - 2007
JO - Materials Transactions
JF - Materials Transactions
IS - 9
ER -