Mechanical behavior of ultrafine-grained Al composites reinforced with B4C nanoparticles
Mechanical behavior of ultrafine-grained Al composites reinforced with B4C nanoparticles
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DOI：
10.1016/j.scriptamat.2011.06.037
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发表时间：
2011-10
影响因子：
6
通讯作者：
Zhihui Zhang;T. Topping;Y. Li;R. Vogt;Yizhang Zhou;Christopher D. Haines;J. Paras;D. Kapoor
中科院分区：
文献类型：
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作者：
Zhihui Zhang;T. Topping;Y. Li;R. Vogt;Yizhang Zhou;Christopher D. Haines;J. Paras;D. Kapoor
研究了纳米增强体对超细晶复合材料力学性能的影响。采用低温球磨-固结工艺制备了晶粒尺寸为115 nm、B4 C增强体尺寸为38 nm的Al 5083（Al-4.5Mg-0.57Mn-0.25Fe）复合材料。结果表明，纳米颗粒的存在下，通过与位错的相互作用，提高强度，同时延缓晶粒生长。此外，纳米颗粒增强的复合材料相对于用微米颗粒增强的相同材料表现出增强的塑性。讨论了潜在的机制。
The influence of nanoscale reinforcement on the mechanical behavior of ultrafine-grained composites was studied. Al 5083 (Al–4.5Mg–0.57Mn–0.25Fe) composites, with grain size of 115nm and B4C reinforcement size of 38nm, were fabricated via cryomilling and consolidation. The result reveals that the presence of nanoparticles enhances strength by interacting with dislocations, while simultaneously retarding grain growth. Furthermore, the nanoparticles-reinforced composite exhibits enhanced plasticity relative to the same material reinforced with micrometric particles. The underlying mechanisms are discussed.