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首页> 外文期刊>Materials Science and Engineering >Microstructural modification and strength enhancement by SiC nanoparticles in AZ31 magnesium alloy during hot rolling
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Microstructural modification and strength enhancement by SiC nanoparticles in AZ31 magnesium alloy during hot rolling

机译：AZ31镁合金热轧过程中SiC纳米颗粒的组织改性和强度增强

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摘要

Effects of SiC nanoparticles on the microstructural and textural evolutions of AZ31 matrix alloy during hot rolling were investigated. The addition of SiC nanoparticles can strongly inhibit the formation of shear bands, which are much more prevalent in matrix alloy sheets. Compared with pristine AZ31 alloy, the nanocomposite is characterized by a lamellar structure which is composed by the alternative a fine grain layer and a coarse grain layer. The lamellar structure was caused by the nanoparticle bands in as-rolled sheet. The fine grain layer was caused by the pinning effects of nanoparticles on recrystallized grain growth. Moreover, nanoparticles complicatedly altered the basal texture intensities of the matrix in the nanocomposite, instead of the reported simply weakening effect. For the mechanical strengths, the hot rolling leads to remarkable enhancement for both of nanocomposite and alloy sheets. However, the former ones always show superior value than the latter ones. Inhibited shear bands, nanoparticles bands and the associated lamellar structure do benefit the stronger mechanical properties in the nanocomposite sheets.
机译：研究了SiC纳米颗粒对AZ31基体合金热轧过程中组织和组织演变的影响。 SiC纳米颗粒的添加可以强烈抑制剪切带的形成，该剪切带在基体合金薄板中更为普遍。与原始的AZ31合金相比，纳米复合材料的特征在于呈层状结构，该结构由交替的细晶粒层和粗晶粒层组成。层状结构是由轧制薄板中的纳米颗粒带引起的。细晶粒层是由纳米颗粒对再结晶晶粒生长的钉扎作用引起的。而且，纳米颗粒复杂地改变了纳米复合材料中基质的基础纹理强度，而不是仅仅报道了弱化作用。对于机械强度，热轧可显着提高纳米复合材料和合金薄板的性能。但是，前者总是显示出比后者更高的价值。抑制剪切带，纳米颗粒带和相关的层状结构确实有益于纳米复合材料片材中更强的机械性能。

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