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Time‐dependent fracture of type 316L(N) steel at ambient temperature
Author(s) -
BUDDEN P. J.,
WARDLE G.,
BIRKETT R. P.
Publication year - 2005
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/j.1460-2695.2005.00914.x
Subject(s) - materials science , austenitic stainless steel , austenite , creep , ultimate tensile strength , fracture (geology) , composite material , metallurgy , structural engineering , corrosion , microstructure , engineering
Experimental data on tensile and compact geometry (CT) specimens of austenitic Type 316L(N) steel were obtained under sustained load conditions at room temperature. Time‐dependent crack growth, in some cases leading to failure, occurred in many of the CT specimens, dependent on the load level. However, rupture of the uniaxial specimens occurred only at stresses very close to the material's ultimate strength. The data validate the approach to assessing sustained loading effects in the R6 defect assessment procedure. In particular, sustained load effects in austenitic steel may be neglected for values of the R6 L r parameter less than unity. Uniaxial sustained load tests were also performed at 100 °C and 200 °C. The measured strain rates decreased with increasing temperature, becoming negligible at 200 °C. This is consistent with the advice in R6 that sustained load effects in austenitic steel can be neglected at temperatures between 200 °C and the high‐temperature creep range.