Fine scale structures from deformation of aluminium containing small alumina particles
Fine scale structures from deformation of aluminium containing small alumina particles
复制标题
DOI：
10.1016/s1359-6454(01)00330-5
复制
发表时间：
2002-01-08
期刊：
影响因子：
9.4
通讯作者：
Liu, YL
中科院分区：
文献类型：
--
作者：
Barlow, CY;Hansen, N;Liu, YL
研究了含有氧化铝颗粒的细分散体的铝的显微组织和力学性能。通过冷轧变形至1.4和3.5之间的应变，通过TEM表征微观结构。的变形结构演变非常迅速，形成纳米结构的材料，与细亚晶粒直径约0.2微米和分数的高角度的边界已经很高的应变为1.4，但继续增加与轧制应变。轧制材料的屈服应力和延展性在拉伸中测量，并且所有材料的性能相似。屈服应力的测量与使用微观结构模型的估计。讨论了小颗粒在形成和稳定变形组织中的作用。这种纳米结构的冷变形合金具有以相对较低的成本有效提高的机械性能。这使得它和类似的颗粒强化合金具有良好的商业开发潜力。(C)2002 Acta Materialia Inc.由爱思唯尔科技有限公司出版。保留所有权利。
Microstructures and mechanical properties have been studied in aluminium containing a fine dispersion of alumina particles. deformed by cold-rolling to strains between 1.4 and 3.5, The microstructure was characterised by TEM. The deformation structures evolved very rapidly, forming a nanostructured material, with fine subgrains about 0.2 mum in diameter and a fraction of high-angle boundaries which was already high at a strain of 1.4, but continued to increase with rolling strain. The yield stress and ductility of the rolled materials were measured in tension, and properties were similar for all materials. Yield stress measurements were correlated with estimates made using microstructural models. The role of small particles in forming and stabilising the deformation structure is discussed.This nanostructured cold-deformed alloy has mechanical properties which are usefully enhanced at comparatively low cost. This gives it, and similar particle-strengthened alloys, good potential for commercial exploitation. (C) 2002 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.