کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1584791 | 1514907 | 2006 | 9 صفحه PDF | دانلود رایگان |
The diminishing of strain hardening effect has been an important issue in understanding the special deformation mechanism in the nano- and ultrafine- (uf-)grained materials. The deformation of an electroformed polycrystalline pure copper with both nano- and uf-sized twins was performed by uniaxial tension. Strain hardening rate was studied using the Kocks–Mecking plot approach. Microstructure evolutions of the two-scale sized twins at different strain conditions were observed and compared by means of transmission electron microscopy. A link between the abnormal hardening rate and the deformation mode inside nano- and uf-sized twins was established, and the diminishing of the hardening rate is attributed to the enhanced creep tendency and premature recovery of the special microstructures.
Journal: Materials Science and Engineering: A - Volume 441, Issues 1–2, 15 December 2006, Pages 282–290