Microstructure, Hardness and Thermal Properties of Al4.5Cu/TiO2 Composites Produced by Mechanical Alloying

Mustafa Okumuş

Article Details

Microstructure, Hardness and Thermal Properties of Al4.5Cu/TiO2 Composites Produced by Mechanical Alloying

Authors:

Mustafa Okumuş

Publisher:

Gazi University

Main Topics:

Mühendislik

Journal:

Politeknik Dergisi Vol.27 Issue 1, pp.1-10

Document Type:

Article

Publication Date:

2/2024

Document Language:

English

Document ID (Org No.):

2001312542

pISSN:

2147-9429

Keywords:

Abstract:

 Al4.5CuTiO2 composites were fabricated from their elemental powders by the mechanical alloying method. Microstructural and thermal properties of the composites were investigated by a combination of differential thermal analysis DTA, scanning electron microscopy with energy dispersive X-ray detection SEM-EDX, and X-ray diffraction XRD. Microstructural evolutions, phase transformations, and crystallite size changes were investigated depending on the milling time. XRD and SEM results showed that there were a more homogeneous structure and shrinkage in grain size due to the increased milling time. The DTA results showed an endothermic peak of around 650 oC which indicates the melting temperature of Al. Besides, the mechanical properties of the pressed and sintered composites were investigated by Vickers micro-hardness testing. The results showed that microhardness values significantly increased as milling time increased from 5h to 10h. The maximum microhardness value of 17310 HV was obtained for Al4.5Cu with 20 wt TiO2 composite after milling for 10h.

 Al4.5CuTiO2 composites were fabricated from their elemental powders by the mechanical alloying method. Microstructural and thermal properties of the composites were investigated by a combination of differential thermal analysis DTA, scanning electron microscopy with energy dispersive X-ray detection SEM-EDX, and X-ray diffraction XRD. Microstructural evolutions, phase transformations, and crystallite size changes were investigated depending on the milling time. XRD and SEM results showed that there were a more homogeneous structure and shrinkage in grain size due to the increased milling time. The DTA results showed an endothermic peak of around 650 oC which indicates the melting temperature of Al. Besides, the mechanical properties of the pressed and sintered composites were investigated by Vickers micro-hardness testing. The results showed that microhardness values significantly increased as milling time increased from 5h to 10h. The maximum microhardness value of 17310 HV was obtained for Al4.5Cu with 20 wt TiO2 composite after milling for 10h.

 Al4.5CuTiO2 composites were fabricated from their elemental powders by the mechanical alloying method. Microstructural and thermal properties of the composites were investigated by a combination of differential thermal analysis DTA, scanning electron microscopy with energy dispersive X-ray detection SEM-EDX, and X-ray diffraction XRD. Microstructural evolutions, phase transformations, and crystallite size changes were investigated depending on the milling time. XRD and SEM results showed that there were a more homogeneous structure and shrinkage in grain size due to the increased milling time. The DTA results showed an endothermic peak of around 650 oC which indicates the melting temperature of Al. Besides, the mechanical properties of the pressed and sintered composites were investigated by Vickers micro-hardness testing. The results showed that microhardness values significantly increased as milling time increased from 5h to 10h. The maximum microhardness value of 17310 HV was obtained for Al4.5Cu with 20 wt TiO2 composite after milling for 10h.

 Al4.5CuTiO2 kompozitleri, mekanik alaşımlama yöntemiyle elemental tozlarından üretilmiştir. Kompozitlerin mikroyapısal ve termal özellikleri, diferansiyel termal analiz DTA, enerji dağılımlı X-ışını algılamalı taramalı elektron mikroskobu SEM-EDX ve X-ışını kırınımının XRD bir kombinasyonu ile araştırıldı. Öğütme süresine bağlı olarak mikroyapısal evrimler, faz dönüşümleri ve kristalit boyutu değişiklikleri incelenmiştir. XRD ve SEM sonuçları, öğütme süresinin artması nedeniyle daha homojen bir yapı ve tane boyutunda küçülme olduğunu göstermiştir. DTA sonuçları, Alnin erime sıcaklığını gösteren yaklaşık 650 oCde bir endotermik pik gösterdi. Ayrıca, preslenmiş ve sinterlenmiş kompozitlerin mekanik özellikleri Vickers mikro sertlik testi ile incelenmiştir. Sonuçlar, öğütme süresinin 5 saatten 10 saate çıktığında mikrosertlik değerlerinin önemli ölçüde arttığını göstermiştir. 10 saat öğütme sonrasında maksimum mikrosertlik değeri, ağırlıkça 20 TiO2li Al4.5Cu kompozit için 17310 HV elde edilmiştir.

Article Details

Microstructure, Hardness and Thermal Properties of Al4.5Cu/TiO2 Composites Produced by Mechanical Alloying

Authors:

Mustafa Okumuş

Publisher:

Gazi University

Main Topics:

Mühendislik

Journal:

Politeknik Dergisi Vol.27 Issue 1, pp.1-10

Document Type:

Article

Publication Date:

2/2024

Document Language:

English

Document ID (Org No.):

2001312542

pISSN:

2147-9429

Metal matrix composites

thermal properties

microstructure

mechanical alloyingMetal matrisli kompozitler

termal özellikler

mikro yapı

mekanik alaşımlama.

Issues

Article Details

Authors: Mustafa Okumuş

Publisher: Gazi University

Main Topics: Mühendislik

Journal: Politeknik Dergisi Vol.27 Issue 1, pp.1-10

Document Type: Article

Publication Date: 2/2024

Document Language: English

Document ID (Org No.): 2001312542

pISSN: 2147-9429

Issues

Authors:

Mustafa Okumuş

Publisher:

Gazi University

Main Topics:

Mühendislik

Journal:

Politeknik Dergisi Vol.27 Issue 1, pp.1-10

Document Type:

Article

Publication Date:

2/2024

Document Language:

English

Document ID (Org No.):

2001312542

pISSN:

2147-9429