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Stochastic Approach To The Changes In The Mechanical Properties Of Nano-Crystalline Materials Induced By Grain Growth

Thomas B. Tengen 1Tomasz Wejrzanowski 2,4Radosław Iwankiewicz 3Krzysztof J. Kurzydlowski 2,4

1. Department of Industrial Engineering and Operations Management, Vaal University of Technology (VUT), Vanderbijlpark 1900, South Africa
2. Warsaw University of Technology, Faculty of Materials Science and Engineering (InMat), Wołoska 141, Warszawa 02-507, Poland
3. Institue of Mechanics and Ocean Engineering, Hamburg University of Technology, Eissedorfer Strasse 42, Hamburg D-21073, Germany
4. Interdisciplinary Centre for Materials Modelling (ICMM), Woloska 141, Warszawa 02-507, Poland


Polycrystalline nanomaterials can be manufactured through different processing routes. The consequence is that nanomaterials having the same mean grain size may have different grain size dispersion and, hence, different material properties.

The present paper studies the impact of detail microstructure evolution on the mechanical properties of nanocrystalline materials. The model for the evolution of the mechanical properties developed is tested on aluminium samples.

The results obtained from the present model reveal many salient features of the mechanical properties of the aluminium samples. Different mechanisms of grain growth impart different nature of response on the material mechanical properties. The conventional, homologous or anomalous temperature dependence of the yield stress has been revealed to be due to different nature of interactions of the microstructures during evolution.

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Presentation: Poster at E-MRS Fall Meeting 2008, Symposium K, by Thomas B. Tengen
See On-line Journal of E-MRS Fall Meeting 2008

Submitted: 2008-05-09 12:18
Revised:   2009-06-07 00:48