A study of dynamic plasticity in austenite stainless steels with a gradient distribution of nanoscale twins. (May 2017)

• Record Type: Journal Article
• Authors: Zhu, Linli; Wen, Chunsheng; Gao, Chongyang; Guo, Xiang; Lu, Jian
• Is Part Of: Scripta materialia. Number 133(2017)
• Page Start: 49
• Page End: 53
• Publication Date: 2017-05
• Subjects: Gradient-nanotwinned austenite stainless steels -- Dynamic plasticity -- Twin spacing -- Strain rate -- Constitutive model; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2017.02.005
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: The dynamic plastic behavior related to the gradient distribution of twin spacing in 304 stainless steel thin wires is investigated experimentally with the strain rate varying from 1 × 10 − 3 /s to 1.5 × 10 4 /s. Such gradient-nanotwinned structures are prepared by surface mechanical attrition treatment. A mechanism-based dynamic plastic model is developed to describe the strain-rate dependent stress-strain response in gradient-nanotwinned austenite stainless steels. A good agreement between experimental data and simulations was achieved, and further theoretical predictions demonstrated that the dynamic plastic behavior is sensitive to the twin spacing and volume fraction of gradient-nanotwinned region in austenite stainless steel wires. Graphical abstract: