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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Development and strengthening mechanisms of bulk ultrafine grained AA6063/SiC composite sheets with varying reinforcement size ranging from nano to micro domain
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Development and strengthening mechanisms of bulk ultrafine grained AA6063/SiC composite sheets with varying reinforcement size ranging from nano to micro domain

机译：膨胀粒子散粒粒子AA6063 / SIC复合板具有不同加固尺寸的开发和加强机制，从纳米到微结构域

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摘要

The bulk ultrafine grained (UFG) AA6063/4 wt.%SiC composite sheets with varying reinforcement size of SiC (12 mu m (coarse), 1 mu m (fine) and 45 nm (nano)) have been developed with a novel hybrid process of stir casting and cryo-severe plastic deformation process (cryorolling). The influence of SiC particle size during development of UFG composites and its effect on microstructural modification, strengthening mechanism and failure mechanism was studied in detail. The resultant effect of cryorolling and size of SiC particles has resulted in significant microstructural refinement (less than 350 nm in all UFG composites) and accumulation of high dislocation density; which resulted in improvement in tensile strength as 88%, 108% and 141% in UFG composites reinforced with coarse, fine and nano particles respectively as compared to the unreinforced base alloy. A good agreement in theoretical and experiment yield strength of UFG coarse and fine composites is observed with a variation in UFG nano composite. (C) 2018 Elsevier B.V. All rights reserved.
机译：用新颖的杂交种开发了块状超粒子（UFG）AA6063 / 4wt。具有不同增强尺寸（12μm（粗），1μm（细）和45nm（纳米））的不同增强尺寸的SiC复合片材（12μm（粗），1μm（纳米））。搅拌铸造和低温沉重塑性变形工艺（低温）。详细研究了UFG复合材料开发过程中SiC粒径的影响及其对微观结构改性，强化机理和失效机理的影响。 Cryorolling和SiC颗粒的尺寸的所得到的效果导致显着的微观结构细化（在所有UFG复合材料中小于350nm）和高位脱位密度的积累;在与未原始的基础合金相比，在用粗糙的，精细和纳米颗粒中加强的UFG复合材料中的拉伸强度为88％，108％和141％的拉伸强度的改善。用UFG纳米复合材料的变化观察到UFG粗粗组合物的理论和实验屈服强度的良好一致性。 （c）2018年elestvier b.v.保留所有权利。

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