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Grain refinement and mechanical properties in ultrafine grained Pd and Pd-Ag alloys produced by HPT

机译：HPT生产的超细颗粒Pd和Pd-Ag合金的晶粒细化和力学性能

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摘要

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 (γ_(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.
机译：使用透射和高分辨率电子显微镜，XRD分析和拉伸测试，彻底研究了高压扭转（HPT）处理的超细颗粒Pd和Pd-x％Ag（x = 10，20,40）合金的组织和力学性能。 。 Ag含量的增加导致堆垛层错能（γ_（SF））的降低。通过HPT可以在合金中生产不同的超细晶粒结构，并研究其优越的强度和延展性。在分析应变硬化机理和堆垛层错能量影响的基础上，讨论了这种独特的力学行为的性质。

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  • 来源
    《Materials Science and Engineering》 |2010年第8期|1776-1783|共8页
  • 作者

    L. Kurmanaeva; Yu. Ivanisenko; J. Markmann; C. Kuebel; A. Chuvilin; S. Doyle; R.Z. Valiev; H.-J. Fecht;

  • 作者单位

    Institute fuer Nanotechnologie, Karlsruhe Institute fuer Technologie, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany;

    Institute fuer Nanotechnologie, Karlsruhe Institute fuer Technologie, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany;

    Institute fuer Nanotechnologie, Karlsruhe Institute fuer Technologie, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany Universitaet des Saarlandes, FR7.3 Technische Physik, Campus D2 2, 66123 Saarbruecken, Germany;

    Institute fuer Nanotechnologie, Karlsruhe Institute fuer Technologie, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany;

    Materialwissenschaftliche Elektronenmikroskopie, Universitaet Ulm, Albert-Einstein-Allee 11, 89081 Ulm, Germany;

    Institut fuer Synchrotronstrahlung, Karlsruhe Institute of Technologie, PO Box 3640, 76021 Karlsruhe, Germany;

    Institut of Physics of Advanced Materials, Ufa State Aviation Technical University, K.Marx 12,450000 Ufa, Russia;

    Institute fuer Nanotechnologie, Karlsruhe Institute fuer Technologie, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany Institut fuer Mikro- und Nanomaterialien, Universitaet Ulm, Albert-Einstein-Allee 47, 89081 Ulm, Germany;

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  • 关键词

    palladium alloys; high pressure torsion; ultrafine grained materials; stacking fault energy; strain hardening behaviour;

    机译：钯合金高压扭力超细颗粒材料;堆积故障能量;应变硬化行为;

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