Effects of strontium-modification, iron-based intermetallics and aging conditions on the impact toughness of Al-(6-11)%Si alloys /

Elsebaie, Ossama

doi:10.1522/030145950

Cited by 2 publications

(1 citation statement)

References 24 publications

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“…86,95,96 Such modifications could reduce the solution treatment time and improve the overall mechanical properties. 37,97 Nevertheless, some studies 98,99 have shown that the addition of the modifier elements is often associated with increased porosity. Gruzleski and Closset 100 and Lados et al 101 stated that chemical modification by Sb and Sr did not have a considerable impact on fatigue lifetime of AlSiMg alloys; meanwhile Gundlach et al 26 reported the beneficial effect of eutectic Si modification on thermal fatigue resistance.…”

Section: Description Of Al-si Based Alloysmentioning

confidence: 99%

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

Javidani

Larouche

2014

International Materials Reviews

329

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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