Grain refinement and mechanical properties in ultrafine grained Pd and Pd-Ag alloys produced by HPT
Grain refinement and mechanical properties in ultrafine grained Pd and Pd-Ag alloys produced by HPT
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DOI：
10.1016/j.msea.2009.11.001
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发表时间：
2010-03-25
期刊：
影响因子：
6.4
通讯作者：
Fecht, H. -J.
中科院分区：
文献类型：
--
作者：
Kurmanaeva, L.;Ivanisenko, Yu.;Fecht, H. -J.
采用透射电镜、高分辨电镜、X射线衍射分析和拉伸试验研究了高压扭转（HPT）工艺制备的超细晶Pd和Pd-x% Ag（x = 10，20，40）合金的显微组织和力学性能。Ag含量的增加导致堆垛层错能（γ（SF））的降低，这使得通过HPT在合金中产生不同的超细晶结构并研究其上级的强度和延展性成为可能。这种独特的力学行为的性质进行了讨论的应变硬化机制和堆垛层错能的影响的分析的基础上。(C)2009 Elsevier B. V.保留所有权利。
The microstructure and the mechanical properties of ultrafine grained Pd and Pd-x% Ag (x = 10, 20, 40) alloys processed by high pressure torsion (HPT) were thoroughly investigated using transmission and high resolution electron microscopy, XRD analysis and tensile tests. The increased Ag content resulted in decrease of the stacking fault energy (gamma(SF)), which made it possible to produce by means of HPT different ultrafine-grained structures in the alloys and to study their superior strength and ductility. The nature of such unique mechanical behaviour is discussed on the basis of analysis of strain hardening mechanisms and effect of stacking fault energy. (C) 2009 Elsevier B.V. All rights reserved.