Porosity and the fatigue behavior of hypoeutectic and hypereutectic aluminum–silicon casting alloys

Ammar, Hany R.; Samuel, A. M.; Samuel, F. H.

doi:10.1016/j.ijfatigue.2007.08.012

Cited by 156 publications

(84 citation statements)

References 15 publications

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“…This is generally expected due to the stress conditions and localized plastic deformation induced by surface discontinuities [209,210]. According to Brandl et al [30], the imperfections, however, can turn into a surface-notch after final machining and even promote crack initiation.…”

Section: Fatiguementioning

confidence: 99%

A review on selective laser sintering/melting (SLS/SLM) of aluminium alloy powders: Processing, microstructure, and properties

Olakanmi

Mullis

Dalgarno

2015

Progress in Materials Science

1,429

526

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Section: Fatiguementioning

confidence: 99%

A review on selective laser sintering/melting (SLS/SLM) of aluminium alloy powders: Processing, microstructure, and properties

Olakanmi

Mullis

Dalgarno

2015

Progress in Materials Science

1,429

526

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“…For conventionally cast specimens, shrinkage cavities have been most frequently observed at the crack initiation sites [4,5,8,[12][13][14].…”

Section: Introductionmentioning

confidence: 99%

High cycle fatigue strength of permanent mold and rheocast aluminum 357 alloy

Brochu

Verreman

Ajersch

et al. 2010

International Journal of Fatigue

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The high cycle fatigue resistances of aluminum-silicium-magnesium 357 alloy prepared by semi-solid forming (SSM) and conventional permanent mold casting (PM) are compared under fully reversed loading. Results, reported in S-N diagrams, show that rheocasting improves the as-cast alloy mean fatigue strength, by 36% at 10 7 cycles. Part of this improvement is explained by the fact that more SSM specimens are defect free than PM specimens. Comparison of the S-N diagrams also reveals that precipitation hardening slightly increases the fatigue strengths of the PM and SSM alloys, and that eutectic modification has no effect on the fatigue performance of the SSM alloy. Observation of small cracks using replicas shows the existence of crack growth decelerations at grain boundaries. No similar decelerations are observed when the crack enters a new a-Al cell within a grain. According to these results, it is proposed that in the absence of defects, the fatigue strength of aluminum alloy 357 is a function of the grain size (D) rather than of the secondary dendrite arm spacing (SDAS) or the spherical diameter of the alpha phase globules (u sph ). Thus, it is concluded that the fatigue strength improvement of the SSM alloy is also related to the smaller grain of the rheocast specimens.

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“…These groups of aluminium alloys are the most versatile materials, comprising 85-90 % of the total aluminium cast parts produced by the automotive industry due to their highest strength-to-weight ratio, good thermal conductivity, excellent fluidity, hot tear resistance and feeding characteristics that allow casting intricate shapes such as engine blocks, cylinder head-sore chassis components [1][2][3][4][5]. These materials are important for their Si, Mg and Cu content, because Si considerably increase castability, tensile properties and hardness while Cu or Mg addition improve mechanical properties thanks heat treatment possibilities.…”

Section: Introductionmentioning

confidence: 99%

Porosity formation and fatigue properties of AlSiCu cast alloy

et al. 2018

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Abstract.The need for aluminium alloys having a good toughness, high strength, adequate damage tolerance capability, good fatigue resistance and good corrosion resistance for use in the industries applications of aerospace, automotive and even commercial products led to study of the properties and structure of the AlSi9Cu3 cast alloy. The most important metallurgical parameters affecting the aluminium alloy's resistance to fatigue load are the amount, types and size of casting defects. Therefore quantitative analysis was used for determination of casting defects size by optical microscopy on metallographic sections and an analysis of the size distribution by extreme value statistics. The software NIS Elements was used for quantitative analysis of casting defects and results show that porosity have a great influence on to the fatigue properties of AlSi9Cu3 cast alloy.

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Porosity and the fatigue behavior of hypoeutectic and hypereutectic aluminum–silicon casting alloys

Cited by 156 publications

References 15 publications

A review on selective laser sintering/melting (SLS/SLM) of aluminium alloy powders: Processing, microstructure, and properties

A review on selective laser sintering/melting (SLS/SLM) of aluminium alloy powders: Processing, microstructure, and properties

High cycle fatigue strength of permanent mold and rheocast aluminum 357 alloy

Porosity formation and fatigue properties of AlSiCu cast alloy

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