Experimental analysis and constitutive modelling of cyclic behaviour of 316L steels including hardening/softening and strain range memory effect in LCF regime

Abstract : Cyclic behaviour prediction of materials and structures is always of great interest to industry. In this work, total strain controlled low cycle fatigue (LCF) tests of two 316L austenitic stainless steels (named 316L-A and 316L-B) were conducted under strain amplitudes ranging from ±0.3% to ±1.5%. The analysis of the experimental results shows that both of the studied steels undergo an initial hardening, followed by a long range of softening, especially under lower strain amplitudes (from ±0.3% to ±0.5%). For 316L-B, obvious secondary hardening can be observed under higher strain amplitudes (from ±0.8% to ±1.25%). In addition, the two steels exhibit a significant strain range memory effect during cyclic loading. It is revealed that the observed hardening/softening behaviour as well as the strain range memory effect are mainly attributed to the back stress, while the isotropic hardening variation under different strain amplitudes has a similar trend.
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Submitted on : Tuesday, September 3, 2019 - 2:33:19 PM
Last modification on : Monday, September 16, 2019 - 4:35:57 PM

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Jianqiang Zhou, Zhidan Sun, Pascale Kanouté, Delphine Retraint. Experimental analysis and constitutive modelling of cyclic behaviour of 316L steels including hardening/softening and strain range memory effect in LCF regime. International Journal of Plasticity, Elsevier, 2018, 107, pp.54-78. ⟨10.1016/j.ijplas.2018.03.013⟩. ⟨hal-02277225⟩

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