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Effects of Temper Conditions and Step-Quenching-Ageing on the Hardness Characteristics and Yield Strength of A356.0-type Al-Si-Mg Alloy

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Abstract

In this paper, the effect of different tempers and thermal ageing treatments on the hardness characteristics and yield strength of A356.0-type Al-Si-Mg alloy has been studied. The investigations consist of artificial ageing without solution heat treatments (T5), solution heat treated with artificial ageing (T6), interrupted-quenching-ageing (IQA) and step-quenching-ageing (SQA) under artificial ageing condition. The hardness of the SQA alloy aged at 180°C/4 h and 200°C/1–4 h with respect to double and single thermal ageing treatment and there corresponding yield strength (YS) were computed. The phases in the treated alloys were identified from the X-ray diffractometry spectrum (XRD). Equally, the hardness behavior was correlated with the microstructures using optical microscope (OPM) and scanning electron microscope equipped with energy dispersive spectroscope (SEM-EDS). SQA treated alloy has demonstrated improved hardness. The XRD of the alloy aged at various conditions has been found to contain strengthening phases which contributed to higher hardness of the samples within the ageing temperatures and time considered.

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Authors and Affiliations

  1. Department of Metallurgical and Materials Engineering, Ahmadu Bello University, Zaria, Nigeria

    M. Abdulwahab, I. A. Madugu & S. A. Yaro

  2. Department of Chemical and Metallurgical Engineering, Tshwane University of Technology, Pretoria, South Africa

    M. Abdulwahab & A. P. I. Popoola

Authors
  1. M. Abdulwahab
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  2. I. A. Madugu
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  3. S. A. Yaro
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  4. A. P. I. Popoola
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Correspondence to M. Abdulwahab.

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Abdulwahab, M., Madugu, I.A., Yaro, S.A. et al. Effects of Temper Conditions and Step-Quenching-Ageing on the Hardness Characteristics and Yield Strength of A356.0-type Al-Si-Mg Alloy. Silicon 4, 137–143 (2012). https://doi.org/10.1007/s12633-012-9111-5

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  • DOI: https://doi.org/10.1007/s12633-012-9111-5

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