Giant Young’S Modulus Variations in Ultrafine-Grained Copper Caused by Texture Changes at Post-Spd Heat Treatment / Gigantyczne Zmiany Modułu Younga W Ultra Drobnoziarnistej Miedzi Spowodowane Przez Zmiany Tekstury W Trakcie Obróbki Cieplnej Po SPD

Archives of Metallurgy and Materials

A. Davydenko¹  P. Pal-Val²  L. Pal-Val²  V. Natsik²  A. Rybalko³ 

[1] A. Galkin Donetsk Physico-Technical Institute, 83114 Donetsk, Ukraine;B. Verkin Institute for Low Temperature Physics and Engineering, 61103 Kharkov, Ukraine;S. Kuznets Kharkov National University of Economics, 61166 Kharkov, Ukraine

关键词: Keywords: elastic properties;    Young’s modulus;    severe plastic deformation;    crystallographic texture;   

DOI  :  10.1515/amm-2015-0491

学科分类：金属与冶金

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

The effect of annealing on dynamic Young’s modulus, E, of ultrafine-grained (UFG) copper obtained by combined severe plastic deformation (SPD) is investigated. It is established that Young’s modulus in the SPD-prepared samples exceeds that in the coarse-grained fully annealed (CGFA) samples by 10 to 20 %. Isothermal annealing at elevated temperatures between 90 and 630°С leads to a sharp decrease of Young’s modulus for annealing temperatures above 210°С. After annealing at 410°С, the value of E reaches its minimal value that is 35 % lower than E in CGFA samples (total change in E is about 47 % of the initial value). Further annealing at higher temperatures leads to an increase in Young’s modulus. It is shown, that the unusual behavior of Young’s modulus is caused by formation of the <111> axial texture in the SPD-treated samples which then is replaced by the <001> texture during the post-SPD heat treatment.

【 授权许可】

Unknown