Effect of Injected Oxygen Amount on the Gas Porosity and Mechanical Properties of a Pore-Free Die-Cast Al–Si–Cu Alloy

With the rise in the demand for eco-friendly and electric vehicles, welding and heat treatment are becoming very important to meet the necessary weight reduction, complexity, and high functionality of die castings. Pore-free (PF) die casting is an effective process that enables heat treatment and we...

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Autores principales:	Ho-Jung Kang, Ho-Sung Jang, Seong-Hyo Oh, Pil-Hwan Yoon, Gyu-Heun Lee, Jin-Young Park, Yoon-Suk Choi
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	high-pressure die casting (HPDC) pore-free DC injected oxygen amount gas porosity mechanical properties Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/6d193ed1deea4bbbb308d8cb67c0d904
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spelling	oai:doaj.org-article:6d193ed1deea4bbbb308d8cb67c0d9042021-11-25T18:22:06ZEffect of Injected Oxygen Amount on the Gas Porosity and Mechanical Properties of a Pore-Free Die-Cast Al–Si–Cu Alloy10.3390/met111118052075-4701https://doaj.org/article/6d193ed1deea4bbbb308d8cb67c0d9042021-11-01T00:00:00Zhttps://www.mdpi.com/2075-4701/11/11/1805https://doaj.org/toc/2075-4701With the rise in the demand for eco-friendly and electric vehicles, welding and heat treatment are becoming very important to meet the necessary weight reduction, complexity, and high functionality of die castings. Pore-free (PF) die casting is an effective process that enables heat treatment and welding due to low gas porosities. Indeed, this process affords castings of low gas porosity, similar to those attained by high-vacuum die casting. In this study, we compared the gas porosities of different castings fabricated by PF die casting using varied injected oxygen amounts. The castings were all subjected to T6 heat treatment and analyzed by computed tomography (CT) to compare their microstructure and mechanical properties before and after T6 heat treatment. The results revealed that with the increasing injected oxygen amount, the gas porosity of the specimens decreased while their mechanical properties increased. In particular, the gas porosity was the lowest at 1.26 L. Moreover, the 1.26 L specimen displayed the best tensile strength, yield strength, and elongation results. Finally, Weibull distribution analysis revealed that the tensile strength and elongation repeatability and reproducibility increased with increasing injected oxygen amount.Ho-Jung KangHo-Sung JangSeong-Hyo OhPil-Hwan YoonGyu-Heun LeeJin-Young ParkYoon-Suk ChoiMDPI AGarticlehigh-pressure die casting (HPDC)pore-free DCinjected oxygen amountgas porositymechanical propertiesMining engineering. MetallurgyTN1-997ENMetals, Vol 11, Iss 1805, p 1805 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	high-pressure die casting (HPDC) pore-free DC injected oxygen amount gas porosity mechanical properties Mining engineering. Metallurgy TN1-997
spellingShingle	high-pressure die casting (HPDC) pore-free DC injected oxygen amount gas porosity mechanical properties Mining engineering. Metallurgy TN1-997 Ho-Jung Kang Ho-Sung Jang Seong-Hyo Oh Pil-Hwan Yoon Gyu-Heun Lee Jin-Young Park Yoon-Suk Choi Effect of Injected Oxygen Amount on the Gas Porosity and Mechanical Properties of a Pore-Free Die-Cast Al–Si–Cu Alloy
description	With the rise in the demand for eco-friendly and electric vehicles, welding and heat treatment are becoming very important to meet the necessary weight reduction, complexity, and high functionality of die castings. Pore-free (PF) die casting is an effective process that enables heat treatment and welding due to low gas porosities. Indeed, this process affords castings of low gas porosity, similar to those attained by high-vacuum die casting. In this study, we compared the gas porosities of different castings fabricated by PF die casting using varied injected oxygen amounts. The castings were all subjected to T6 heat treatment and analyzed by computed tomography (CT) to compare their microstructure and mechanical properties before and after T6 heat treatment. The results revealed that with the increasing injected oxygen amount, the gas porosity of the specimens decreased while their mechanical properties increased. In particular, the gas porosity was the lowest at 1.26 L. Moreover, the 1.26 L specimen displayed the best tensile strength, yield strength, and elongation results. Finally, Weibull distribution analysis revealed that the tensile strength and elongation repeatability and reproducibility increased with increasing injected oxygen amount.
format	article
author	Ho-Jung Kang Ho-Sung Jang Seong-Hyo Oh Pil-Hwan Yoon Gyu-Heun Lee Jin-Young Park Yoon-Suk Choi
author_facet	Ho-Jung Kang Ho-Sung Jang Seong-Hyo Oh Pil-Hwan Yoon Gyu-Heun Lee Jin-Young Park Yoon-Suk Choi
author_sort	Ho-Jung Kang
title	Effect of Injected Oxygen Amount on the Gas Porosity and Mechanical Properties of a Pore-Free Die-Cast Al–Si–Cu Alloy
title_short	Effect of Injected Oxygen Amount on the Gas Porosity and Mechanical Properties of a Pore-Free Die-Cast Al–Si–Cu Alloy
title_full	Effect of Injected Oxygen Amount on the Gas Porosity and Mechanical Properties of a Pore-Free Die-Cast Al–Si–Cu Alloy
title_fullStr	Effect of Injected Oxygen Amount on the Gas Porosity and Mechanical Properties of a Pore-Free Die-Cast Al–Si–Cu Alloy
title_full_unstemmed	Effect of Injected Oxygen Amount on the Gas Porosity and Mechanical Properties of a Pore-Free Die-Cast Al–Si–Cu Alloy
title_sort	effect of injected oxygen amount on the gas porosity and mechanical properties of a pore-free die-cast al–si–cu alloy
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/6d193ed1deea4bbbb308d8cb67c0d904
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Effect of Injected Oxygen Amount on the Gas Porosity and Mechanical Properties of a Pore-Free Die-Cast Al–Si–Cu Alloy

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