Please use this identifier to cite or link to this item:
http://bura.brunel.ac.uk/handle/2438/15189
Title: | Steady state and a general scale law of deformation |
Authors: | Huang, Y |
Issue Date: | 2017 |
Citation: | IOP Conference Series: Materials Science and Engineering, 2017, 219 (1) |
Abstract: | © Published under licence by IOP Publishing Ltd. Steady state deformation has been characterized based on the experimental results for dilute single-phase aluminium alloys. It was found that although characteristic properties such as flow stress and grain size remained constant with time, a continuous loss of grain boundaries occurred as an essential feature at steady state. A physical model, which takes into account the activity of grain boundary dislocations, was developed to describe the kinetics of steady state deformation. According to this model, the steady state as a function of strain rate and temperature defines the limit of the conventional grain size and strength relationship, i.e., the Hall-Petch relation holds when the grain size is larger than that at the steady state, and an inverse Hall-Petch relation takes over if grain size is smaller than the steady state value. The transition between the two relationships relating grain size and strength is a phenomenon that depends on deformation conditions, rather than an intrinsic property as generally perceived. A general scale law of deformation is established accordingly. |
URI: | http://bura.brunel.ac.uk/handle/2438/15189 |
DOI: | http://dx.doi.org/10.1088/1757-899X/219/1/012029 |
ISSN: | 1757-8981 1757-899X |
Appears in Collections: | Dept of Mechanical and Aerospace Engineering Research Papers |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Fulltext.pdf | 622.39 kB | Adobe PDF | View/Open |
Items in BURA are protected by copyright, with all rights reserved, unless otherwise indicated.