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首页> 外文会议>TMS Annual Meeting Exhibition >DEVELOPMENT OF HIGH-STRENGTH AND HIGHLY DUCTILE HYPO-EUTECTIC Al-Si ALLOYS BY NANO-REFINING THE CONSTITUENT PHASES
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DEVELOPMENT OF HIGH-STRENGTH AND HIGHLY DUCTILE HYPO-EUTECTIC Al-Si ALLOYS BY NANO-REFINING THE CONSTITUENT PHASES

机译：通过纳米精制组分相，通过纳米精炼的高强度和高强度脱髓鞘Al-Si合金的研制

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Among the structural light weight materials, Al-Si alloys can be the most widely used Al-alloys for aerospace and automotive applications. Our recent experiments using Ba additions of 1-3wt% into the melt of hypo- and hyper-eutectic Al-Si alloys have shown considerable promise in terms of both Si refinement of nano-scale (verified with both by SEM and TEM studies) and limited mechanical testing. The preliminary experiments indicate that the solidification conditions together with the new hypothesis of Si refinement can be successfully used with permanent mold casting. Recent permanent mold casting of such Al-8%Si-1.8%Ba hypo-eutectic Al-Si alloys have resulted cast alloys that without any further processing revealed a microstructure in which eutectic silicon assumes nano-fibrous morphology and where the primary aluminium phase shows dendrites of very fine size. The alloys in as cast conditions exhibit UTS values of around 172 Mpa and ductility values of about 15%.
机译：在结构轻量级材料中，Al-Si合金可以是航空航天和汽车应用中最广泛使用的Al合金。我们最近使用BA添加的实验1-3wt％进入Hypo-和超共晶Al-Si合金的熔体，在纳米级的Si细化方面已经显示了相当大的希望（通过SEM和TEM研究验证）和有限的机械测试。初步实验表明，凝固条件以及新假设的Si细化的新假设可以成功地与永久模具铸造。最近的永久性模铸件这种Al-8％Si-1.8％BA Hopo-eutectic Al-Si合金具有导致铸造合金，没有任何进一步的加工显示，硅硅假定纳米纤维形态以及主要铝相显示的微观结构枝形非常细小的尺寸。作为铸造条件的合金表现出约172MPa的UTS值，并且延展性值约为15％。

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