TY - GEN
T1 - Investigations on aged Ti-stabilised stainless steels
AU - Ehrnstén, Ulla
AU - Karjalainen-Roikonen, Päivi
AU - Nenonen, Pertti
AU - Korhonen, Ritva
AU - Timofeev, Boris T.
AU - Bloomin, Alexandr A.
N1 - Project code: H2SU00363
PY - 2003
Y1 - 2003
N2 - Mechanical and microstructural properties of cast
material of type O8X8H10TL and wrought and welded
stainless steel pipe material of type O8X8H10T have been
determined, aged at NPP operation temperature for about
100 000 h and 200 000 h, respectively. The mechanical
properties were determined using tensile testing, impact
energy determination and fracture resistance testing. The
microstructures were studied using optical, scanning and
transmission electron microscopy.
The mechanical properties of the cast Ti-stabilised
stainless steel material are evaluated to be only
slightly affected by long term (~100 000 hours) operation
at NPP operation temperature. Also the effect of even
longer (~200 000 hours) operation on wrought
Ti-stabilised pipe material is very small, as the
properties of the aged material are within the normal
range of as-manufactured material. The mechanical
properties of the Mo-alloyed stainless steel weld metal
after ~200 000 hours of operation are still good,
although indications of changes due to thermal ageing
were observed.
AB - Mechanical and microstructural properties of cast
material of type O8X8H10TL and wrought and welded
stainless steel pipe material of type O8X8H10T have been
determined, aged at NPP operation temperature for about
100 000 h and 200 000 h, respectively. The mechanical
properties were determined using tensile testing, impact
energy determination and fracture resistance testing. The
microstructures were studied using optical, scanning and
transmission electron microscopy.
The mechanical properties of the cast Ti-stabilised
stainless steel material are evaluated to be only
slightly affected by long term (~100 000 hours) operation
at NPP operation temperature. Also the effect of even
longer (~200 000 hours) operation on wrought
Ti-stabilised pipe material is very small, as the
properties of the aged material are within the normal
range of as-manufactured material. The mechanical
properties of the Mo-alloyed stainless steel weld metal
after ~200 000 hours of operation are still good,
although indications of changes due to thermal ageing
were observed.
M3 - Conference article in proceedings
SN - 951-38-6280-1
T3 - VTT Symposium
SP - 241
EP - 251
BT - Plant Life Management
PB - VTT Technical Research Centre of Finland
CY - Espoo
T2 - Plant Life Management
Y2 - 1 January 2002 through 1 January 2002
ER -