Role of strain gradient on grain refinement by severe plastic deformation
β Scribed by Yoshikazu Todaka; Minoru Umemoto; Jun Yin; Zhiguang Liu; Koichi Tsuchiya
- Publisher
- Elsevier Science
- Year
- 2007
- Tongue
- English
- Weight
- 859 KB
- Volume
- 462
- Category
- Article
- ISSN
- 0921-5093
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π SIMILAR VOLUMES
Grain refinement during severe plastic deformation (SPD) is predicted using volume averaged number of dislocations generated. The model incorporates a new expansion of a model for hardening in the parabolic hardening regime, in which the work hardening depends on the effective dislocation-free path
Samples of pure Cu and a Cu-10% Zn alloy were processed by high-pressure torsion and by high-pressure torsion followed by cold-rolling to a reduction of βΌ75%. The grain sizes in these two conditions were measured by transmission electron microscopy and by X-ray diffraction. The experimental results