Size dependent strengthening in particle reinforced aluminium
Size dependent strengthening in particle reinforced aluminium
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DOI：
10.1016/s1359-6454(01)00327-5
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发表时间：
2002-01-08
期刊：
影响因子：
9.4
通讯作者：
Mortensen, A
中科院分区：
文献类型：
--
作者：
Kouzeli, M;Mortensen, A
研究了高纯度（99.99%）At陶瓷颗粒床渗透生产的复合材料的拉伸行为作为增强体尺寸和化学（Al2O3和B4C）的函数。在含有B4C颗粒的复合材料中，屈服应力较高，在两种复合材料系统中随着颗粒间距离的减小而增加。复合材料的流动应力，当修正损伤，显示相同的依赖于颗粒间的距离作为屈服应力。整体应变硬化指数，但是，是独立的微观结构的规模。这些观察是合理的基础上的理论几何必要的位错。(C)2002 Acta Materialia Inc.由爱思唯尔科技有限公司出版。保留所有权利。
The tensile behaviour of composites produced by infiltrating ceramic particle beds with high purity (99.99%) At is studied as a function of reinforcement size and chemistry (Al2O3 and B4C). The yield stress is higher in composites containing B4C particles, increasing with decreasing interparticle distance in both composite systems. The flow stress of the composites, when corrected for damage, displays the same dependence on interparticle distance as the yield stress. The overall strain hardening exponent, however, is independent of the microstructural scale. These observations are rationalized based on the theory of geometrically necessary dislocations. (C) 2002 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.