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...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-11-01
|
| Series: | Metals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-4701/11/11/1805 |
| _version_ | 1797509372354494464 |
|---|---|
| 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 |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-03-10T05:16:47Z |
| format | Article |
| id | doaj.art-6d193ed1deea4bbbb308d8cb67c0d904 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T05:16:47Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-6d193ed1deea4bbbb308d8cb67c0d9042023-11-23T00:23:53ZengMDPI AGMetals2075-47012021-11-011111180510.3390/met11111805Effect of Injected Oxygen Amount on the Gas Porosity and Mechanical Properties of a Pore-Free Die-Cast Al–Si–Cu AlloyHo-Jung Kang0Ho-Sung Jang1Seong-Hyo Oh2Pil-Hwan Yoon3Gyu-Heun Lee4Jin-Young Park5Yoon-Suk Choi6Advanced Forming Process R&D Group, Korea Institute of Industrial Technology, Ulsan 44776, KoreaAdvanced Forming Process R&D Group, Korea Institute of Industrial Technology, Ulsan 44776, KoreaAdvanced Forming Process R&D Group, Korea Institute of Industrial Technology, Ulsan 44776, KoreaAdvanced Forming Process R&D Group, Korea Institute of Industrial Technology, Ulsan 44776, KoreaAdvanced Forming Process R&D Group, Korea Institute of Industrial Technology, Ulsan 44776, KoreaAdvanced Forming Process R&D Group, Korea Institute of Industrial Technology, Ulsan 44776, KoreaDepartment of Material Science and Engineering, Pusan National University, Busan 46200, KoreaWith 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.https://www.mdpi.com/2075-4701/11/11/1805high-pressure die casting (HPDC)pore-free DCinjected oxygen amountgas porositymechanical properties |
| spellingShingle | 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 Metals high-pressure die casting (HPDC) pore-free DC injected oxygen amount gas porosity mechanical properties |
| title | 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_short | 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 |
| topic | high-pressure die casting (HPDC) pore-free DC injected oxygen amount gas porosity mechanical properties |
| url | https://www.mdpi.com/2075-4701/11/11/1805 |
| work_keys_str_mv | AT hojungkang effectofinjectedoxygenamountonthegasporosityandmechanicalpropertiesofaporefreediecastalsicualloy AT hosungjang effectofinjectedoxygenamountonthegasporosityandmechanicalpropertiesofaporefreediecastalsicualloy AT seonghyooh effectofinjectedoxygenamountonthegasporosityandmechanicalpropertiesofaporefreediecastalsicualloy AT pilhwanyoon effectofinjectedoxygenamountonthegasporosityandmechanicalpropertiesofaporefreediecastalsicualloy AT gyuheunlee effectofinjectedoxygenamountonthegasporosityandmechanicalpropertiesofaporefreediecastalsicualloy AT jinyoungpark effectofinjectedoxygenamountonthegasporosityandmechanicalpropertiesofaporefreediecastalsicualloy AT yoonsukchoi effectofinjectedoxygenamountonthegasporosityandmechanicalpropertiesofaporefreediecastalsicualloy |