Characterization investigations of a mechanically alloyed and sintered Al-2 wt%Cu alloy reinforced with WC particles

Alper Evirgen; M. Lütfi Öveçoǧlu

doi:10.1016/j.jallcom.2010.02.136

Characterization investigations of a mechanically alloyed and sintered Al-2 wt%Cu alloy reinforced with WC particles

Alper Evirgen^*, M. Lütfi Öveçoǧlu

^*Corresponding author for this work

Department of Metallurgical and Materials Engineering

Istanbul Technical University

Research output: Contribution to journal › Article › peer-review

25 Citations (Scopus)

Abstract

Elemental powders of Al, Cu and WC were mechanically alloyed in a high energy mill for milling durations of 1 h, 2 h, 3 h and 5 h to constitute the Al-2Cu-7WC (wt%) composition. The microstructural characterizations of powders were performed with SEM and XRD analyses and additionally microhardness tests were applied for mechanical characterization. DSC and post-XRD tests were carried out to study the phase transformations in powder form. The MA'd powder pellets were sintered under inert Ar atmosphere at 650 °C for 4 h. XRD, SEM, and EDS investigations and microhardness measurements were conducted for the microstructural and mechanical characterization of sintered samples. DSC and XRD examinations of powders MA'd for 5 h showed that decomposition of WC after 450 °C led to the formation of Al₁₂W intermetallic which provided high strength composites. The XRD and SEM investigations revealed the presence of Al₁₂W phase in all sintered samples. Microhardness of sintered samples increased with the increase of MA duration. A maximum Vickers hardness of 201 HV and a maximum sinter density of 93.3% have been observed for the sample MA'd for 5 h.

Original language	English
Pages (from-to)	212-217
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	496
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jallcom.2010.02.136
Publication status	Published - 30 Apr 2010

Funding

Additionally the main author (Alper Evirgen) would like to express his gratitude to Scientific and Technological Research Council of Turkey (TUBITAK) for their financial support during his master studies. The authors would like to express their appreciations to Ms. Çiğdem Çakır for carrying out experiments in SEM devices, Mr. Hasan Gökçe for his valuable help to use sintering furnaces and Mr. Caner Evirgen for his very worthy help during sample preparations for mechanical tests. The present study is one of the outcomes of a research project entitled “Development of Al–Cu Based Metal Matrix Composites via Powder Metallurgy Techniques” funded by State Planning Organization (DPT) with the project number 90189. Further, we would like to express our gratitude to State Planning Organization (DPT) for funding the project entitled “Advanced Technologies in Engineering” with the project number 2001K120750 out of which the main infrastructure of the Particulate Materials Laboratories was founded.

Funders	Funder number
DPT	90189, 2001K120750
TUBITAK
Devlet Planlama Örgütü
Türkiye Bilimsel ve Teknolojik Araştirma Kurumu

Keywords

Characterization
Intermetallics
Mechanical alloying
Tungsten carbide

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10.1016/j.jallcom.2010.02.136

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abstract = "Elemental powders of Al, Cu and WC were mechanically alloyed in a high energy mill for milling durations of 1 h, 2 h, 3 h and 5 h to constitute the Al-2Cu-7WC (wt%) composition. The microstructural characterizations of powders were performed with SEM and XRD analyses and additionally microhardness tests were applied for mechanical characterization. DSC and post-XRD tests were carried out to study the phase transformations in powder form. The MA'd powder pellets were sintered under inert Ar atmosphere at 650 °C for 4 h. XRD, SEM, and EDS investigations and microhardness measurements were conducted for the microstructural and mechanical characterization of sintered samples. DSC and XRD examinations of powders MA'd for 5 h showed that decomposition of WC after 450 °C led to the formation of Al12W intermetallic which provided high strength composites. The XRD and SEM investigations revealed the presence of Al12W phase in all sintered samples. Microhardness of sintered samples increased with the increase of MA duration. A maximum Vickers hardness of 201 HV and a maximum sinter density of 93.3% have been observed for the sample MA'd for 5 h.",

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AU - Evirgen, Alper

AU - Öveçoǧlu, M. Lütfi

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Y1 - 2010/4/30

N2 - Elemental powders of Al, Cu and WC were mechanically alloyed in a high energy mill for milling durations of 1 h, 2 h, 3 h and 5 h to constitute the Al-2Cu-7WC (wt%) composition. The microstructural characterizations of powders were performed with SEM and XRD analyses and additionally microhardness tests were applied for mechanical characterization. DSC and post-XRD tests were carried out to study the phase transformations in powder form. The MA'd powder pellets were sintered under inert Ar atmosphere at 650 °C for 4 h. XRD, SEM, and EDS investigations and microhardness measurements were conducted for the microstructural and mechanical characterization of sintered samples. DSC and XRD examinations of powders MA'd for 5 h showed that decomposition of WC after 450 °C led to the formation of Al12W intermetallic which provided high strength composites. The XRD and SEM investigations revealed the presence of Al12W phase in all sintered samples. Microhardness of sintered samples increased with the increase of MA duration. A maximum Vickers hardness of 201 HV and a maximum sinter density of 93.3% have been observed for the sample MA'd for 5 h.

AB - Elemental powders of Al, Cu and WC were mechanically alloyed in a high energy mill for milling durations of 1 h, 2 h, 3 h and 5 h to constitute the Al-2Cu-7WC (wt%) composition. The microstructural characterizations of powders were performed with SEM and XRD analyses and additionally microhardness tests were applied for mechanical characterization. DSC and post-XRD tests were carried out to study the phase transformations in powder form. The MA'd powder pellets were sintered under inert Ar atmosphere at 650 °C for 4 h. XRD, SEM, and EDS investigations and microhardness measurements were conducted for the microstructural and mechanical characterization of sintered samples. DSC and XRD examinations of powders MA'd for 5 h showed that decomposition of WC after 450 °C led to the formation of Al12W intermetallic which provided high strength composites. The XRD and SEM investigations revealed the presence of Al12W phase in all sintered samples. Microhardness of sintered samples increased with the increase of MA duration. A maximum Vickers hardness of 201 HV and a maximum sinter density of 93.3% have been observed for the sample MA'd for 5 h.

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KW - Intermetallics

KW - Mechanical alloying

KW - Tungsten carbide

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ER -

Characterization investigations of a mechanically alloyed and sintered Al-2 wt%Cu alloy reinforced with WC particles

Abstract

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Keywords

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