Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5443599 | Scripta Materialia | 2017 | 5 Pages |
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 Ã 10â 3/s to 1.5 Ã 104/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 abstractDownload high-res image (202KB)Download full-size image