Competing damage mechanisms in the thermo-mechanical fatigue of AISI 304L stainless steel

► TMF of 304L stainless steel in two temperature ranges with four phase differences. ► Dynamic strain aging occurs from 300 to 500 °C without the serration. ► In the 450–700 °C range, the creep is the most dominant damage mechanism. ► Qualitative modeling of the competition between the DSA and the c...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2011-11, Vol.529, p.417-424
Main Authors: Bae, Keun-Ho, Kim, Hyun-Ho, Lee, Soon-Bok
Format: Article
Language:English
Subjects:
Applied sciences
Austenitic stainless steels
Crack propagation
Creep
Creep (materials)
Dynamic strain aging
Elasticity. Plasticity
Exact sciences and technology
Fatigue
Fatigue (materials)
Fatigue life
Fractures
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metals. Metallurgy
Microstructure
Phase difference
Stainless steels
Strain
Thermo-mechanical fatigue
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Summary:► TMF of 304L stainless steel in two temperature ranges with four phase differences. ► Dynamic strain aging occurs from 300 to 500 °C without the serration. ► In the 450–700 °C range, the creep is the most dominant damage mechanism. ► Qualitative modeling of the competition between the DSA and the creep. Thermo-mechanical fatigue (TMF) in AISI 304L stainless steel is investigated in two temperature ranges using four phase differences between the mechanical loading and the temperature. In the temperature range from 450 °C to 700 °C, the fatigue life was lowest in the in-phase condition. However, in the temperature range from 400 °C to 650 °C, the minimum fatigue life occurs in the counter-clockwise-diamond condition. Estimation of creep strains occurring in the TMF cycle based on the monotonic creep tests predicts the highest creep strains in the in-phase conditions in the two temperature ranges, but cannot explain the minimum life in the counter-clockwise-diamond condition in the lower temperature range. This phenomenon is explained qualitatively by the operation ranges of dynamic strain aging and the creep of this material and their competition in the TMF cycle. This explanation predicts the highest influence of the creep in the counter-clockwise-diamond condition in the temperature range of 400–650 °C.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2011.09.054