Improvement in Metallurgical Properties of Gravity Die Cast 2024-T6 Aluminum Alloy via Cryogenic Process

Tan, Engin; Aksöz, Sinan; Kaplan, Yavuz; Can, Hilal; Dışpınar, Derya

doi:10.1007/978-3-030-06034-3_25

Cited by 4 publications

(2 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Bu artıştaki en büyük etkenlerin başında ise; Al ve alaşımlarının kullanım alanlarının sahip oldukları düşük yoğunluk, diğer alaşımlara nazaran kolay şekil verilebilirlik ve uygulanan ısıl işlemler sayesinde yüksek sertlik değerleri kazandırılabilmesidir. Ayrıca Al ve alaşımlarının mekanik özelliklerinin, Toz Metalürjisi (T/M) gibi yeni üretim prosesleriyle geliştirilmesi ve kullanım bulması ile mekanik özelliklerde önemli artışlar sağlanabilmiştir [1][2][3][4][5]. Birçok Al alaşımı düşük yoğunluk sebebiyle geniş bir uygulama alanı bulmakta olup, Mg ilavesi yapılarak, hafiflikle beraber, iyileştirilmiş korozyon direncine de sahip olarak, çok daha avantajlı bir malzeme haline gelmektedir [6].…”

Section: Gi̇ri̇ş (Introduction)unclassified

“…Hafif ve yüksek mukavemetli olması sebebiyle son yıllarda, Alüminyum (Al) ve alaşımları üzerine yapılan çalışmalar ciddi bir artış göstermektedir [1][2][3]. Bu artıştaki en büyük etkenlerin başında ise; Al ve alaşımlarının kullanım alanlarının sahip oldukları düşük yoğunluk, diğer alaşımlara nazaran kolay şekil verilebilirlik ve uygulanan ısıl işlemler sayesinde yüksek sertlik değerleri kazandırılabilmesidir.…”

Section: Gi̇ri̇ş (Introduction)unclassified

See 1 more Smart Citation

The Effects of Zn, Cu and Mg Elements on Ageing, Microstructure and Hardness in Al Alloys Produced by P/M Method

Aksöz

Ada

Ince

et al. 2020

Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım Ve Teknoloji

Self Cite

View full text Add to dashboard Cite

In this study, two different compositions contain pure Al, Zn, Cu and Mg were produced by powder metallurgy. The powders were pressed under 800 MPa and sintered in purity argon atmosphere at 600ºC after pressing process. Solution heat treatment were applied to sintered samples at 480ºC and then rapid quenching was performed. For quenched samples; Ageing process was carried out at 120ºC for 3h periods totally 12 hours. As a result, the ageing process leads to increased hardness due to the homogeneously dispersed secondary precipitates that form internally in the microstructure. Figure A. Circuit schema of the production processPurpose: The purpose of this study is investigation on effect of alloy elements on microstructure and hardness properties for Al alloy. Theory and Methods:The grinding process of the powders was carried out in Alcohol for 120 minutes. The powders were pressed under 800 MPa and sintered in an atmosphere-controlled furnace (high purity argon atmosphere) at 600ºC after pressing process. Solution treating was carried out at 480ºC for 2 hours. Field Emission Scanning Electron Microscopy (FESEM), Element Distribution Spectrometry (EDS) and Mapping (MAP) was used for microstructure analysis of the samples. Results:It is observed that the hardness values increase significantly after the ageing heat treatments for both alloys. In addition, after the solution process, while the hardness values of the alloy 1 was 130 HV, the hardness value of the alloy 2 increased up to 146 HV. The reason of this is Cu content that plays vital role in hardness of Al alloy. Conclusion:Ternary Al alloy was produced by PM in the different compositions. The effects of the alloying elements on the hardness and microstructure were examined. The study shows that the hardness increases in the alloy 2 due to the homogeneously dispersed Cu and secondary phases (such as Al2Cu) formed after heat treatments.

show abstract

Section: Gi̇ri̇ş (Introduction)unclassified

The Effects of Zn, Cu and Mg Elements on Ageing, Microstructure and Hardness in Al Alloys Produced by P/M Method

Aksöz

Ada

Ince

et al. 2020

Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım Ve Teknoloji

Self Cite

View full text Add to dashboard Cite

show abstract

Development of High Performance of Al Alloys via Cryo‐Forming: A Review

Xiong

Su²,

Kong

et al. 2021

Adv Eng Mater

View full text Add to dashboard Cite

Weight reduction is a major trend in the development of automotive, marine, and aerospace industry. Al alloys are the ideal choice for the lightweight design because of their superior mechanical properties and small mass density. In recent years, research results have demonstrated that plastic processing at cryogenic temperature can improve the mechanical properties of Al alloys. Herein, the mechanical properties of Al alloys at cryogenic environment as well as at room temperature are compared, and then the main progress is introduced in the development of fabrication of high‐performance Al alloys using cryo‐forming methods, such as cryorolling, asymmetric cryorolling, cryo‐extrusion, and cryo‐forging, with subsequent heat treatment. The grain refinement mechanism and the strengthening mechanism of Al alloys during various cryo‐forming processes are discussed. Finally, the potential development prospects of future researches in this field are proposed.

show abstract

Effects of Aging and Deep Cryogenic Treatment on Wear Behavior of Al7075 Alloy

Mavi

Kaplan

Aksöz

2021

Journal of Tribology

View full text Add to dashboard Cite

This study investigated the effects of aging and deep cryogenic treatment applied to Al7075 alloy on hardness and wear behavior. In this context, two different categories were created for the aging process. For the first group, after solutionizing the samples at 520 °C for 2 h, aging was applied at 120 °C for 12 h to reach 177 HV hardness. In the second group, after solutionizing at 520 °C for 2 h, the aging process was applied at 200 °C for 8 h to reach a hardness value of 164 HV. In addition, deep cryogenic treatment (12 h, 24 h, and 36 h at −140 °C) was applied to the samples after the solutionizing and aging processes. The pin-on-disc wear test was carried out according to the ASTM G99 standard in order to examine the effects of the aging and cryogenic processes on wear behavior. The highest wear resistance was obtained with the Al7075 sample aged at 120 °C for 12 h followed by the 12-h deep cryogenic treatment. Hardness values and wear test results showed that the applied cryogenic process had positively affected the wear behavior.

show abstract

Improvement in Metallurgical Properties of Gravity Die Cast 2024-T6 Aluminum Alloy via Cryogenic Process

Cited by 4 publications

References 18 publications

The Effects of Zn, Cu and Mg Elements on Ageing, Microstructure and Hardness in Al Alloys Produced by P/M Method

The Effects of Zn, Cu and Mg Elements on Ageing, Microstructure and Hardness in Al Alloys Produced by P/M Method

Development of High Performance of Al Alloys via Cryo‐Forming: A Review

Effects of Aging and Deep Cryogenic Treatment on Wear Behavior of Al7075 Alloy

Contact Info

Product

Resources

About