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<p>This study examines the influence of alloying elements on the mechanical properties of aluminium alloys produced through high-pressure die casting (HPDC). Specifically, the effects of magnesium in EN AC 43400 (AlSi10Mg(Fe)) and copper in EN AC 46200 (AlSi8Cu3) were investigated. Magnesium additions of 0.4 wt.% and 0.6 wt.% and copper additions of 2.4 wt.% and 2.7 wt.% were individually introduced. Microstructural analyses revealed changes in phase distribution and elemental interactions. Hardness measurements confirmed that both alloying elements led to increased hardness values, with a more pronounced effect observed in EN AC 46200 with copper additions. Fatigue tests demonstrated that magnesium improved fatigue resistance in EN AC 43400, likely due to enhanced precipitation hardening and refined microstructure. Conversely, copper did not yield a positive effect on fatigue behaviour, possibly due to embrittlement and altered crack propagation mechanisms. These findings highlight the varying roles of magnesium and copper in modifying the mechanical performance of HPDC aluminium alloys.</p>

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Fatigue Behaviour of Aluminum Alloys Produced by High-Pressure Die Casting Method

  • 期刊论文

  • 发表日期：

    2025年8月13日

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  • Y. Y. Özbek,
  • F. Yeşil

摘要

This study examines the influence of alloying elements on the mechanical properties of aluminium alloys produced through high-pressure die casting (HPDC). Specifically, the effects of magnesium in EN AC 43400 (AlSi10Mg(Fe)) and copper in EN AC 46200 (AlSi8Cu3) were investigated. Magnesium additions of 0.4 wt.% and 0.6 wt.% and copper additions of 2.4 wt.% and 2.7 wt.% were individually introduced. Microstructural analyses revealed changes in phase distribution and elemental interactions. Hardness measurements confirmed that both alloying elements led to increased hardness values, with a more pronounced effect observed in EN AC 46200 with copper additions. Fatigue tests demonstrated that magnesium improved fatigue resistance in EN AC 43400, likely due to enhanced precipitation hardening and refined microstructure. Conversely, copper did not yield a positive effect on fatigue behaviour, possibly due to embrittlement and altered crack propagation mechanisms. These findings highlight the varying roles of magnesium and copper in modifying the mechanical performance of HPDC aluminium alloys.