Effect of eutectic Si size on the flow behavior and hot processing map of near eutectic Al–Si alloys

Flow behavior of three near eutectic Al–Si alloys with the same chemical composition but different average eutectic Si sizes (A1, 1.7 μm; A2, 4.4 μm; A3, 8.2 μm) was investigated by isothermal compression tests conducted on a Gleeble-3500 thermal simulator under four different temperatures (350 °C,...

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Autores principales:	Xiaoru Zhuo, Haichao Xu, Yuna Wu, Zhichao Hu, Jinghua Jiang, Aibin Ma
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Al–Si alloy Hot deformation Processing map Gleeble DRX Flow behavior Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/ec50035374e644939e7e1fab1bfb3f2d
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spelling	oai:doaj.org-article:ec50035374e644939e7e1fab1bfb3f2d2021-11-24T04:31:23ZEffect of eutectic Si size on the flow behavior and hot processing map of near eutectic Al–Si alloys2238-785410.1016/j.jmrt.2021.11.015https://doaj.org/article/ec50035374e644939e7e1fab1bfb3f2d2021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2238785421012941https://doaj.org/toc/2238-7854Flow behavior of three near eutectic Al–Si alloys with the same chemical composition but different average eutectic Si sizes (A1, 1.7 μm; A2, 4.4 μm; A3, 8.2 μm) was investigated by isothermal compression tests conducted on a Gleeble-3500 thermal simulator under four different temperatures (350 °C, 400 °C, 450 °C, and 500 °C) and four different strain rates (0.01 s−1, 0.1 s−1, 1 s−1, and 5 s−1), with a focus on the effect of eutectic Si size. Not only the flow behavior but also the processing map of near eutectic Al–Si alloys are affected by eutectic Si size. The overall trends of the flow stress–strain curves of the three alloys are similar, but their steady flow stresses σs are different: A1 alloy has the largest σs, followed by that of A3. Strain-compensated constitutive equations in the hyperbolic sine form were constructed to describe the flow stress behavior of the three alloys. Materials constants of the constitutive equations depend on eutectic Si size. The processing maps of the three alloys exhibit different characteristics. The instability domain of A2 alloy is restricted to strain rates larger than about 0.4 s−1, in contrast to the case of A1 and A3 alloys in which the instability domain occurs at both low and high strain rates. The results presented in this study indicate that eutectic Si size is an indispensable factor to be considered when dealing with the hot working of Al–Si alloys.Xiaoru ZhuoHaichao XuYuna WuZhichao HuJinghua JiangAibin MaElsevierarticleAl–Si alloyHot deformationProcessing mapGleebleDRXFlow behaviorMining engineering. MetallurgyTN1-997ENJournal of Materials Research and Technology, Vol 15, Iss , Pp 5694-5705 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Al–Si alloy Hot deformation Processing map Gleeble DRX Flow behavior Mining engineering. Metallurgy TN1-997
spellingShingle	Al–Si alloy Hot deformation Processing map Gleeble DRX Flow behavior Mining engineering. Metallurgy TN1-997 Xiaoru Zhuo Haichao Xu Yuna Wu Zhichao Hu Jinghua Jiang Aibin Ma Effect of eutectic Si size on the flow behavior and hot processing map of near eutectic Al–Si alloys
description	Flow behavior of three near eutectic Al–Si alloys with the same chemical composition but different average eutectic Si sizes (A1, 1.7 μm; A2, 4.4 μm; A3, 8.2 μm) was investigated by isothermal compression tests conducted on a Gleeble-3500 thermal simulator under four different temperatures (350 °C, 400 °C, 450 °C, and 500 °C) and four different strain rates (0.01 s−1, 0.1 s−1, 1 s−1, and 5 s−1), with a focus on the effect of eutectic Si size. Not only the flow behavior but also the processing map of near eutectic Al–Si alloys are affected by eutectic Si size. The overall trends of the flow stress–strain curves of the three alloys are similar, but their steady flow stresses σs are different: A1 alloy has the largest σs, followed by that of A3. Strain-compensated constitutive equations in the hyperbolic sine form were constructed to describe the flow stress behavior of the three alloys. Materials constants of the constitutive equations depend on eutectic Si size. The processing maps of the three alloys exhibit different characteristics. The instability domain of A2 alloy is restricted to strain rates larger than about 0.4 s−1, in contrast to the case of A1 and A3 alloys in which the instability domain occurs at both low and high strain rates. The results presented in this study indicate that eutectic Si size is an indispensable factor to be considered when dealing with the hot working of Al–Si alloys.
format	article
author	Xiaoru Zhuo Haichao Xu Yuna Wu Zhichao Hu Jinghua Jiang Aibin Ma
author_facet	Xiaoru Zhuo Haichao Xu Yuna Wu Zhichao Hu Jinghua Jiang Aibin Ma
author_sort	Xiaoru Zhuo
title	Effect of eutectic Si size on the flow behavior and hot processing map of near eutectic Al–Si alloys
title_short	Effect of eutectic Si size on the flow behavior and hot processing map of near eutectic Al–Si alloys
title_full	Effect of eutectic Si size on the flow behavior and hot processing map of near eutectic Al–Si alloys
title_fullStr	Effect of eutectic Si size on the flow behavior and hot processing map of near eutectic Al–Si alloys
title_full_unstemmed	Effect of eutectic Si size on the flow behavior and hot processing map of near eutectic Al–Si alloys
title_sort	effect of eutectic si size on the flow behavior and hot processing map of near eutectic al–si alloys
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/ec50035374e644939e7e1fab1bfb3f2d
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Effect of eutectic Si size on the flow behavior and hot processing map of near eutectic Al–Si alloys

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