Manifestations of dynamic strain aging under low and high cycle fatigue in a type 316LN stainless steel. (2nd November 2018)

• Record Type: Journal Article
• Authors: Sarkar, Aritra; Nagesha, A.; Sandhya, R.; Laha, K.; Okazaki, M.
• Is Part Of: Materials at high temperatures. Volume 35:Number 6(2018)
• Page Start: 523
• Page End: 528
• Publication Date: 2018-11-02
• Subjects: Dynamic strain aging -- low cycle fatigue -- high cycle fatigue -- 316LN SS; Materials at high temperatures -- Periodicals; High temperatures -- Periodicals; 620.1121705
• DOI: 10.1080/09603409.2017.1404684
• Languages: English
• ISSNs: 0960-3409

Abstract

Abstract: Influence of Dynamic strain aging (DSA) under low cycle fatigue (LCF) and high cycle fatigue (HCF) loading was investigated by conducting LCF and HCF tests on specimens over a wide range of temperature from 573 to 973 K. DSA was found to be highly pronounced in the temperature range of 823–873 K. DSA was seen to have contrasting implications under LCF and HCF deformation. The cyclic hardening owing to DSA caused an increase in the cyclic stress response under LCF, leading to decrease in cyclic life. On the other hand, the DSA-induced strengthening suppressed the crack initiation phase under HCF where the applied stress remains fixed, leading to an increase in the cyclic life.