Microstructure and strength of severely deformed fcc metals
Microstructure and strength of severely deformed fcc metals
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DOI：
10.1016/j.msea.2006.02.455
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发表时间：
2007-07-25
期刊：
影响因子：
6.4
通讯作者：
Ungar, T.
中科院分区：
文献类型：
--
作者：
Gubicza, J.;Chinh, N. Q.;Ungar, T.
研究了经大塑性变形处理的超细晶面心立方金属(Al、Al-Mg合金、铜和镍)的显微组织与强度的关系。用泰勒方程对高应变下屈服强度的饱和值与位错密度进行了关联。结果表明，严重变形的面心立方金属的主要强化机制是位错间的相互作用。此外，不同面心立方金属在室温下变形时的饱和强度可以用剪切模数和绝对熔点来描述。分析结果表明，在Al-Mg合金中加入镁合金元素后，位错密度的最大值增大，强度提高。(C)2006爱思唯尔B.V.保留所有权利。
The relationship is examined between the microstructure and the strength of ultrafine-grained fcc metals (Al, Al-Mg alloys, Cu and Ni) processed by severe plastic deformation. The saturation value of the yield strength obtained at high strains is correlated with the dislocation density by using the Taylor equation. The results suggest that the main strengthening mechanism in severely deformed fcc metals is the interaction between dislocations. Furthermore, the saturation strength of different fcc metals deformed at room temperature may be described by using the shear modulus and the absolute melting point. The results of the analysis show that for Al-Mg alloys the addition of the Mg alloying element to the Al matrix leads to an increase in the maximum value of the dislocation density and consequently to an increase in the strength. (C) 2006 Elsevier B.V. All rights reserved.