【请教】晶粒尺寸与性能之间必然符合Hall－Petch公式么？ - 金属

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nanopowders

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ufoer(金币+1,VIP+0):谢谢交流！ 3-3 03:37

我上传过一篇老外的综述性文章，楼主可以看看，很有帮助

Mechanical properties of nanocrystalline materials

M.A. Meyers *, A. Mishra, D.J. Benson
Department of Mechanical and Aerospace Engineering, Materials Science and Engineering Program,
Mail Code 0411, University of California, San Diego La Jolla, CA 92093, United States
Received 1 November 2004; revised 1 May 2005; accepted for publication 1 August 2005

Abstract
The mechanical properties of nanocrystalline materials are reviewed, with emphasis on their constitutive
response and on the fundamental physical mechanisms. In a brief introduction, the most
important synthesis methods are presented. A number of aspects of mechanical behavior are discussed,
including the deviation from the Hall–Petch slope and possible negative slope, the effect
of porosity, the difference between tensile and compressive strength, the limited ductility, the tendency
for shear localization, the fatigue and creep responses. The strain-rate sensitivity of FCC metals
is increased due to the decrease in activation volume in the nanocrystalline regime; for BCC

http://www.namipan.com/d/c816872 ... 077c63c72d01e355a00

[ Last edited by nanopowders on 2009-3-6 at 23:41 ]