کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1574567 | 1514723 | 2015 | 6 صفحه PDF | دانلود رایگان |
A theoretical model has been developed, which reveals the underlying correlation between the strong extra strain hardening achieved in the nano-grained layers of the grain size gradient structure and the non-uniform deformation of the lateral surface in surface nano-crystallized materials, based on some existing experimental observations and the concept of geometrically necessary dislocations. The proposed model led to the establishment of a simple physical law that can be expressed as H⁎=A⁎H⁎=A⁎, where H⁎H⁎ and A⁎A⁎ are two dimensionless parameters. The former represents the extra strain hardening, while the latter characterizes the non-uniform deformation of the lateral surface. The values of these two parameters can be measured through experiments.
Journal: Materials Science and Engineering: A - Volume 620, 3 January 2015, Pages 16–21