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A comparison on isothermal and thermomechanical fatigue behavior of 316LN stainless steel with various tension dwell time by Qingtong Wang; Bingbing Li; Jingwei Zhao; Takamoto Itoh; Xu Chen is a Engineering article available to read on EtoBox.

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Isothermal and thermomechanical fatigue tests with various tension dwell time (designated as creep-IF and creep-TMF respectively) were conducted. The cyclic stress response and stress relaxation behavior were qualitatively and quantitatively discussed based on TEM and EBSD characterization. The fatigue dominated transgranular crack initiation and propagation led to specimen fracture in all creep-IF tests. The transition of dominant damage mechanism from fatigue to creep-fatigue interaction occurred when dwell time increased to 1800 s in creep-TMF test, which caused the intergranular fracture mode and a much shorter life than creep-IF. Moreover, the life prediction model based on tension strain energy was proposed.

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Author

Qingtong Wang; Bingbing Li; Jingwei Zhao; Takamoto Itoh; Xu Chen

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)