Microstructure, hardness and tensile properties of A380 aluminum alloy with and without Li additions

karamouz, Mostafa; Azarbarmas, Mortaza; Emamy, M.; Alipour, Mohammad Amin

doi:10.1016/j.msea.2013.05.088

Cited by 49 publications

(13 citation statements)

References 23 publications

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“…The as-cast alloy A380 without grain refinement and modification (A380AC) showed a dendritic microstructure composed of lighter a-Al phase regions surrounded by a series of darker eutectic Al-Si and b-Fe intermetallic structures (Figures 3(a) and (d)). A similar microstructure was found for the same alloy by Karamouz et al [22] They also observed the presence of another microconstituent frequently formed near the structures of b-Fe intermetallic and eutectic Si plates. Irizalp and Saklakoglu,3 in their studies on the A380 alloy, identified a microconstituent with similar morphology as the h-Al/Cu intermetallic phase.…”

Section: A A380 Alloy Microstructural Characterizationsupporting

confidence: 85%

The Influence of Strontium on Microstructural and Rheological Behavior of the Semi-solid A380 Aluminum Alloy

Ferreira

Lourençato

Roca

et al. 2020

Metall Mater Trans A

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This article aims to correct the lack of information regarding the combined effect of grain refinement and strontium modification on the microstructure and rheological behavior of semi-solid slurries. The A380 aluminum alloy was studied in the semi-solid state in three different conditions: as received, grain refined and grain refined/modified with Sr. To determine the semi-solid temperature, a DSC analysis and Thermo-calcÒ simulations were used. SEM, optical and polarized light microscopy analyses were performed to analyze the microstructural changes caused by the refiner and modifier agents as well as to evaluate the morphological evolution of the alloys in the semi-solid state. The rheological behavior was studied with a hot compression test between parallel plates. The main results show that the addition of Sr, besides its influence on the Si and Fe-b particles, also leads to a better globularization of a-Al phase particles in the semi-solid state. Furthermore, the rheological analysis of stress vs strain and apparent viscosity vs average shear rate also point to a better behavior of the alloy in the semi-solid state after Sr modification, thus indicating that Sr addition could improve the performance of the A380 alloy as a semi-solid feedstock.

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Section: A A380 Alloy Microstructural Characterizationsupporting

confidence: 85%

The Influence of Strontium on Microstructural and Rheological Behavior of the Semi-solid A380 Aluminum Alloy

Ferreira

Lourençato

Roca

et al. 2020

Metall Mater Trans A

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“…DFR consisted of a large number of dimples. Generally for aluminum alloys, the wider the DFR or NR, and the narrower the BFR were, the better plasticity would be [30][31][32]. When Er was added, the DFR was widened obviously, the NR became flat, and the transition between the adjacent regions got smoother, suggesting the plasticity was improved.…”

Section: Er Contentmentioning

confidence: 99%

Effect of Er on Microstructure and Mechanical Properties of 5052 Aluminum Alloy with Big Width-To-Thickness Ratio

et al. 2020

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The effect of Er on microstructure and mechanical properties of the 5052 aluminum alloy with a big width-to-thickness ratio was investigated by a metallurgical microscope, scanning electron microscope and tensile testing machine. The results showed that the precipitates were slightly refined after Er addition and Al3Fe was transformed into Al6Fe and AlEr with/without a small amount of Fe or Si. The effect of Er on grain refinement was related to its content. When Er content was lower or higher than 0.4%, the grain would coarsen. Homogenization could refine the grain by controlling Er content and distribution in the Al matrix. Long time homogenization at high temperature would significantly reduce the strength of the 5052 aluminum alloy and 5052 aluminum alloys with low Er content, but help to improve the plasticity of those with high Er content. The ultimate tensile strength, yield strength and elongation of the as-cast 5052 aluminum alloy were 197 MPa, 117 MPa and 22.5% respectively. The strength was the highest, when Er content was 0.4 wt. % and the elongation was the best at 0.1 wt. % Er content.

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“…Pencirian bahan pateri di dalam skala kecil perlu untuk menentukan tahap keboleharapan pempakejan mikro elektronik. Kajian terdahulu dan terkini banyak memfokuskan kepada sifat mekanik bahan pateri pukal (Karamouz et al 2013;Sauli et al 2014). Sifat mekanik yang dikaji adalah seperti kekuatan tegangan, kekuatan ricih, kekerasan dan rayapan.…”

Section: Pengenalanunclassified

Kesan Penuaan Sesuhu terhadap Sifat Mikro Kekerasan Pempaterian Sn-Ag-Cu/CNT/Cu menggunakan Pelekukan Nano

Ismail¹,

Jalar²,

Bakar³

et al. 2019

JSM

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Kesan penuaan terma terhadap sifat kekerasan sambungan pateri Sn-3.0Ag-0.5Cu (SAC305) yang ditambah dengan partikel karbon tiub nano (CNT) telah dikaji. Sifat kekerasan yang menggambarkan kekuatan sambungan pateri ditentukan melalui pendekatan pelekukan nano. Bahan pateri SAC ditambah dengan 0.03% kandungan berat CNT untuk menghasilkan bahan pes pateri SAC-CNT. Pes pateri yang telah dicetak di atas papan litar bercetak (PCB) berkemasan kuprum (Cu) dikenakan pematerian aliran semula pada suhu puncak 260°C untuk menghasilkan sambungan pateri SAC dan SAC-CNT. Sambungan pateri SAC dan SAC-CNT kemudiannya dikenakan penuaan terma melalui ujian penyimpanan suhu tinggi (HTS) selama 200, 400, 600, 800 dan 1000 j pada suhu tetap iaitu 150°C. Sampel sambungan pateri selepas pematerian dan penuaan terma dianalisis melalui kaedah pelekukan nano untuk menentukan sifat kekerasannya. Untuk analisis mikrostruktur, sampel dipunar dan imej dicerap melalui mikroskop optik. Keputusan menunjukkan nilai kekerasan menurun dengan peningkatan masa penuaan bagi kedua-dua sambungan pateri yang dikaji. Walau bagaimanapun, sambungan pateri SAC-CNT mempunyai kekerasan yang lebih tinggi iaitu sebanyak 10-26% berbanding sambungan pateri SAC. Melalui ujian pelekukan nano, sifat mikro kekerasan bagi sambungan pateri akibat tindakan penuaan terma sesuhu yang bersifat setempat dapat ditentukan. Corak nilai mikro kekerasan yang diperoleh adalah selari dengan corak yang diperoleh menggunakan kaedah ujian kekerasan konvensional.

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Microstructure, hardness and tensile properties of A380 aluminum alloy with and without Li additions

Cited by 49 publications

References 23 publications

The Influence of Strontium on Microstructural and Rheological Behavior of the Semi-solid A380 Aluminum Alloy

The Influence of Strontium on Microstructural and Rheological Behavior of the Semi-solid A380 Aluminum Alloy

Effect of Er on Microstructure and Mechanical Properties of 5052 Aluminum Alloy with Big Width-To-Thickness Ratio

Kesan Penuaan Sesuhu terhadap Sifat Mikro Kekerasan Pempaterian Sn-Ag-Cu/CNT/Cu menggunakan Pelekukan Nano

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