Effect of a two-step solution heat treatment on the microstructure and mechanical properties of 332 aluminium silicon cast alloy

Hanim, M. A. Azmah; Chung, SeungHyeok; Chuan, O. Khang

doi:10.1016/j.matdes.2010.12.040

Cited by 25 publications

(5 citation statements)

References 11 publications

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“…The holding time period of the first step and the solution temperature of the second step are very critical parameters to avoid incipient melting. 180,194,195 Therefore, to achieve an effective dissolution while avoiding coarsening of the constituents, the solutionising parameters (namely time and temperature) have to be optimised. 196,197 In this regard, differential scanning calorimetry (DSC) and electron probe microanalysis are powerful tools, which are discussed in more details below.…”

Section: Strengthening Of Cast Aluminium Alloysmentioning

confidence: 99%

Application of cast Al–Si alloys in internal combustion engine components

Javidani

Larouche

2014

International Materials Reviews

328

112

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Excellent thermal conductivity and lower density make Al-Si alloys a suitable alternative for cast iron in the fabrication of engine components. The increase in the maximum operation temperature and pressure of engines necessitates improving the thermomechanical fatigue performance of Al-Si alloys. This paper has two major parts focussing on the use of Al-Si based alloys in cylinder heads and engine blocks. In the first part, the structural stress-strain and material property requirements of cylinder heads are discussed. In addition, the physical and mechanical properties of different competing materials used in the manufacture of engine components are reviewed. The physical metallurgy, solidification sequence and thermal conductivity of Al-Si based alloys are reviewed. Also discussed is the effect of microstructural features on thermomechanical fatigue lifetime. This part also includes an overview of the strengthening mechanisms of cast Al-Si alloys, by dispersed phases and heat treatment. Demands to improve fuel economy and reduce emissions necessitate modifications in the materials and design of engine blocks. Wear resistance and low friction coefficient are the major characteristics required for engine block materials. In the second part, the most promising alternative approaches to manufacturing liner-less Al-Si alloy cylinder blocks are elaborated.

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Section: Strengthening Of Cast Aluminium Alloysmentioning

confidence: 99%

Application of cast Al–Si alloys in internal combustion engine components

Javidani

Larouche

2014

International Materials Reviews

328

112

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“…After solution treatment, the hardness has increased 12.84% from as cast; the hardness recorded as Hv 107.2. The hardness of the solution sample has increases because of the Sirich phase is spheroidised and refined [3]. According to Sebaie [17], the eutectic Si plays a vital role in determining the hardness.…”

Section: Applied Mechanics and Materials Vol 786mentioning

confidence: 99%

“…It is an ideal material for use in various applications. As noted by Chung [2] and Azmah Hanim et al [3], aluminum alloy is the most commonly used in matrix composite because of its low density, low melting temperature, low cost, good mechanical properties such as strength, ductility, hardness, fatigue, pressure tightness, fluidity and good machinability. As identified by many researchers; the physical properties of aluminum, which makes it lightweight, low density of 2.7 kgm −3 , high Young's modulus of about 72 GPa.…”

Section: Introductionmentioning

confidence: 99%

“…Azmah Hanim et al [3] done a single-step heat treatment (heated at 495°C for 6 hours, quenched in hot water and aged at 250°C for 4 hours) and two-step solution treatment (heated at 495°C for 2 hours, heated at 515°C for 4 hours, quenched in hot water and aged at 250°C for 4 hours). Authors concluded that, the hardness and strength of the Al-Si alloy 332 increased and reduced the ductility.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Heat Treatment on Microstructure, Hardness and Wear of Aluminum Alloy 332

Zainon

Ahmad

Daud

2015

AMM

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This paper describes a study on the effects of heat treatment on the microstructure, hardness and wear of aluminum alloys 332 (AlSi9Cu3Mg). The solution treatment was performed at 500°C for 5 hours and then quenched in water at room temperature. Aging was performed at 170°C for 2 hours. The findings revealed that after a full heat treatment, the structure of the eutectic silicon formed toward fragmentation and spheroidization, and the silicon particles became coarse (look-like rounded). Hard intermetallic compound (Mg2Si) appeared on the microstructure after the aging treatment completed. Compared to the as-cast, the hardness of the alloys has improved to 44.84%, and the wear rate of the solution treatment had decreased to 26% while the aging treatment showed a deterioration of 79.42%. The study concludes that aging treatment improves the hardness of AA332 alloys and enhanced the wear resistance of the substance.

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“…In recent years, there are many research articles on the solution treatment of Al-Zn-Mg-Cu alloys, including single-stage solution treatment [8], two-stage solution treatment [9,10], multi-stage solution treatment [11], enhanced solution treatment and high temperature pre-precipitation treatment [12]. Based on economic and industrial production considerations, single-stage solution treatment is still the most practical process.…”

Section: Introductionmentioning

confidence: 99%

Effect of Zn/Mg Ratio on Second Phase Dissolution during Solution Treatment of Al-Zn-Mg-Cu Alloys

Yin

Wen

et al. 2022

MSF

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The main alloying elements have a decisive influence on the type and quantity of the second phase of the Al-Zn-Mg-Cu alloy, and even on the dissolution of the second phase during solution treatment. The effect of Zn/Mg ratio on second phase dissolution during solution treatment of Al-Zn-Mg-Cu alloys was investigated by means of differential scanning calorimetry (DSC), scanning electron microscope (SEM) and electrical conductivity testing. The results showed that Mg (Zn,Cu,Al)2 phase and Fe-rich phase existed in the as-deformed alloys. In addition, a small amount of Al2CuMg phase was found in the low and medium Zn/Mg ratio alloy. The number of Mg (Zn,Cu,Al)2 phases as the major second phase in the alloys was inversely proportional to the Zn/Mg ratio. Mg (Zn,Cu,Al)2 phase essentially dissolved into the matrix after solution treatment at 465°C/2h. Increasing the solution temperature and time were both beneficial to the dissolution of the Al2CuMg phase. With the increase of the solution temperature from 465°C to 475°C, the conductivity of the alloy showed a decreasing trend initially and then increased. As the solution time increased at 470°C, the electrical conductivity of the low-Zn/Mg ratio alloy decreased and then increased due to the more secondary phase. After the second phase was fully dissolved in the alloy, the electrical conductivity gradually increased with the increase of the solution time.

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Effect of a two-step solution heat treatment on the microstructure and mechanical properties of 332 aluminium silicon cast alloy

Cited by 25 publications

References 11 publications

Application of cast Al–Si alloys in internal combustion engine components

Application of cast Al–Si alloys in internal combustion engine components

Effect of Heat Treatment on Microstructure, Hardness and Wear of Aluminum Alloy 332

Effect of Zn/Mg Ratio on Second Phase Dissolution during Solution Treatment of Al-Zn-Mg-Cu Alloys

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