Influence of the thermal treatment on the deformation-induced precipitation of a hypoeutectic Al-7 wt% Si casting alloy deformed by high-pressure torsion

C.M. Cepeda-Jimenez; J.M. Garcia-Infanta; A.P.Zhilyaev

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Influence of the thermal treatment on the deformation-induced precipitation of a hypoeutectic Al-7 wt% Si casting alloy deformed by high-pressure torsion

机译：热处理对高压扭转变形的亚共晶Al-7 wt％Si铸造合金的变形诱导析出的影响

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A hypoeutectic Al-7 wt% Si alloy was subjected to high-pressure torsion (HPT) at room temperature using an imposed pressure of 6GPa and torsional straining through five revolutions. Different thermal treatments, prior to the HPT processing, resulted in reducing supersaturated Si concentration in comparison to the as-cast material. Microstructural parameters and microhardness were evaluated in the present work:. Processing by HPT produced significant grain refinement with grain sizes of about 200-400 nm. Furthermore, fine deformation-induced Si precipitates from the supersaturated solid solution were observed, which are very useful in retaining the fine microstructure during HPT processing. The microhardness increase was outstanding, with values for processed samples twice higher (84 HV) than that for the as-cast Al-7wt% Si alloy (44 HV). The results demonstrate that the refining and strengthening of the Al matrix by HPT processing depend on the available supersaturated solid solution during the processing.

机译：在室温下，使用6GPa的施加压力对亚共晶Al-7 wt％Si合金进行高压扭转（HPT），并通过五转进行扭转应变。与铸造材料相比，在HPT处理之前进行不同的热处理会降低过饱和Si的浓度。在当前工作中评估了微结构参数和显微硬度：通过HPT加工产生了显着的晶粒细化，晶粒尺寸约为200-400 nm。此外，观察到由过饱和固溶体引起的细小形变引起的Si沉淀，这对于在HPT处理过程中保持细微结构非常有用。显微硬度的提高非常显着，处理后的样品（84 HV）的值是铸态Al-7wt％Si合金（44 HV）的两倍。结果表明，通过HPT加工对Al基体进行细化和强化取决于加工过程中可用的过饱和固溶体。

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《Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics》 |2011年第3期|共8页
作者
C.M. Cepeda-Jimenez; J.M. Garcia-Infanta; A.P.Zhilyaev;
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正文语种 eng
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Al-Si alloys; High-pressure torsion; Deformation-induced precipitation; Microstructure; Mechanical properties;

机译：铝硅合金;高压扭力;形变沉淀;显微组织;力学性能;

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1. Influence of the thermal treatment on the deformation-induced precipitation of a hypoeutectic Al-7 wt% Si casting alloy deformed by high-pressure torsion [J] . C.M. Cepeda-Jimenez, J.M. Garcia-Infanta, A.P.Zhilyaev Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics . 2011,第3期

机译：热处理对高压扭转变形的亚共晶Al-7 wt％Si铸造合金的变形诱导析出的影响
2. Influence of the supersaturated silicon solid solution concentration on the effectiveness of severe plastic deformation processing in Al-7 wt.% Si casting alloy [J] . CM. Cepeda-Jimenez, J.M.Garcia-Infanta, A.P.Zhilyaev, Materials Science and Engineering . 2011,第27期

机译：过饱和硅固溶体浓度对Al-7 wt。％Si铸造合金严重塑性变形加工有效性的影响
3. Effects of ZrC content and mechanical alloying on the microstructural and mechanical properties of hypoeutectic Al-7 wt.% Si composites prepared by spark plasma sintering [J] . Agaogullari Duygu CERAMICS INTERNATIONAL . 2019,第10期

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4. Influence of Mg Content on the Microstructure and Solid Solution Chemistry of Al-7 percent Si-Mg Casting Alloys During Solution Treatment [C] . J. A. Taylor, D. H. St John, J. Barresi International Conference on Aluminium Alloys . 2000

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5. Effect of thermal treatment on tensile properties of a vacuum die cast hypoeutectic aluminum-silicon alloy. [D] . Ahmmed, Kazi Foyez. 2009

机译：热处理对真空压铸亚共晶铝硅合金拉伸性能的影响。
6. Omega Phase Formation in Ti–3wt.Nb Alloy Induced by High-Pressure Torsion [O] . Anna Korneva, Boris Straumal, Askar Kilmametov, 2021

机译：Ti-3wt的Omega相形成。高压扭转诱导的Nb合金
7. Influence of the thermal treatment on the deformation-induced precipitation of a hypoeutectic Al-7wt% Si casting alloy deformed by high-pressure torsion [O] . Cepeda-Jiménez, C.M., García-Infanta, J.M., Zhilyaev, A. P., 2011

机译：热处理对高压扭转变形的亚共晶Al-7wt％Si铸造合金的变形诱发析出的影响

Influence of the thermal treatment on the deformation-induced precipitation of a hypoeutectic Al-7 wt% Si casting alloy deformed by high-pressure torsion

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