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Comparative assessment of strain-controlled fatigue performance of SS 316L at room and low temperatures
Journal
International Journal of Fatigue
ISSN
01421123
Date Issued
2023-01-01
Author(s)
Maharaja, Hitarth
Das, Bimal
Singh, Amit
Mishra, Sushil
Abstract
In the present study, strain-controlled low cycle fatigue (LCF) behaviour of SS 316L at room temperature (RT) and −80 ℃ were investigated. RT LCF specimens show cyclic softening, whereas −80 ℃ specimens show initial cyclic softening followed by hardening due to strain-induced martensitic transformation (SIMT). Fatigue damage evolution mechanism is proposed for specimens tested at −80 °C, where compressive stresses develop due to SIMT and retards the crack growth. This leads to an increase in fatigue life for −80 °C specimens. An increase in back stress component at the initiation of secondary hardening is noticed for −80 °C specimens.
Volume
166
Subjects