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A DUCTILITY EXHAUSTION EVALUATION OF SOME LONG TERM CREEP/FATIGUE TESTS ON AUSTENITIC STEEL
Author(s) -
Wood D. S.,
Wynn J.,
Austin C.,
Green J. G.
Publication year - 1988
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.1460-2695.1988.tb01390.x
Subject(s) - materials science , creep , ductility (earth science) , intergranular corrosion , metallurgy , welding , austenite , austenitic stainless steel , microstructure , corrosion
— A limited number of long term creep/fatigue tests performed on two batches of Type 316 steel and one batch of associated 17Cr8Ni2Mo weld metal are reported. Test durations range from 5000 to 32,000 h and temperatures from 5.50 to 625 ° C. Subsequent metallographic examination shows the failures to be wholly or predominantly intergranular. The results are analysed using a ductility exhaustion approach and it is shown that the endurances obtained are within a factor of two of predicted values. The results confirm that the design approach to creep/fatigue currently being developed in the U.K. and based on ductility exhaustion is likely to be satisfactory.