RT null
T1 Influence of microstructure on fracture toughness and corrosion embrittlement of a duplex stainless steel
A1 Irisarri, A. M.
A1 Erauzkin, E.
AB The influence of microstructural changes induced by means of different heat treatments on fracture toughness and sulphide stress corrosion cracking in a duplex stainless steel has been studied. Heat treatment at 825°C induced the precipitation of sigma phase after a period as short as 5 minutes. The effect of this sigma phase on fracture and corrosion behaviour is dramatic. As much as 95% of the initial toughness was lost after a period of maintenance of only 2 hours and the sulphide stress corrosion test specimens failed after a very short time. Specimens treated at 675°C for a short time exhibited a microstructure constituted by carbides but no sign of any intermetallic compound was observed. These carbides induced a loss of toughness less marked than that found in 825°C samples and the corrosion specimens passed the tests. More prolonged exposures induced the presence of intermetallic phases leading to a further decrease in toughness and the failure of the corrosion specimens. SEM examination helps to explain this behaviour.
SN 0026-0843
YR 1996
FD 1996
LK https://hdl.handle.net/11556/2891
UL https://hdl.handle.net/11556/2891
LA eng
NO Irisarri , A M & Erauzkin , E 1996 , ' Influence of microstructure on fracture toughness and corrosion embrittlement of a duplex stainless steel ' Metallurgia Italiana , vol. 88 , no. 4 , pp. 275-281 .
DS TECNALIA Publications
RD 31 jul 2024