Residual stress and damage development in the aluminium alloy EN AW-6061 particle reinforced with Al2O3 under thermal fatigue loading

Klaska, Arne M.; Beck, Tilmann; Wanner, A.; Löhe, D.

doi:10.1016/j.msea.2008.10.009

Cited by 9 publications

(5 citation statements)

References 40 publications

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“…These stresses include (i) inhomogeneous temperature gradient causing thermally induced global deformation, (ii) in thermal expansion coefficients mismatch resulting in thermally induced local deformation and (iii) deformation of both phase's behaviour and over-aging leading to mechanically induced deformation. 39,40 The present model incorporated the MSL model to estimate the residual thermal stresses under the applied loading conditions. This attributes to the variation of matrix stress from the elastic to the plastic state.…”

Section: Discussionmentioning

confidence: 99%

Influence of residual thermal stresses on fatigue crack growth life of discontinuous reinforcements in metal matrix composites

Tevatia

Srivastava

2016

Fatigue Fract Eng Mat Struct

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The fatigue life prediction model based on crack propagation from micro‐structural features is derived and presented for planar and randomly oriented Discontinuous Reinforced Metal Matrix Composites (DRMMCs). The model contains the influence of micro‐structural properties such as aspect ratio, volume fraction of particle/fibre and constraint between particle and the matrix. The effect of residual thermal stresses generated within the matrix during development of composite is considered. The particle/fibre plays a dominant role in the development of the cyclic plastic zone size ahead of the crack tip; moreover, it enhances the cyclic plastic deformation characteristics of DRMMC. The theoretical model‐based evaluations for low cycle fatigue in DRMMCs are within the proximity of the experimental results.

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Section: Discussionmentioning

confidence: 99%

Influence of residual thermal stresses on fatigue crack growth life of discontinuous reinforcements in metal matrix composites

Tevatia

Srivastava

2016

Fatigue Fract Eng Mat Struct

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“…Four mechanisms causing damage and residual stress development were reported, which include thermally induced global deformation due to inhomogeneous distribution of temperature, thermally induced local deformation due to CTE mismatch, mechanically induced local deformation due to different deformation behaviour of both phases, and overaging. Global deformation was the dominant mechanism in nonreinforced alloy, whereas in composites, local mechanisms were significant [175] . Thermal fatigue of short-fibre-reinforced aluminium AE42 alloys was investigated with an emphasis on the changes in the strain and hardness before and after thermal cycling.…”

Section: Thermal Fatiguementioning

confidence: 97%

The behaviour of aluminium matrix composites under thermal stresses

Dash

Sukumaran

Ray

2014

Science and Engineering of Composite Materials

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The present review work elaborates the behaviour of aluminium matrix composites (AMCs) under various kinds of thermal stresses. AMCs find a number of applications such as automobile brake systems, cryostats, microprocessor lids, space structures, rocket turbine housing, and fan exit guide vanes in gas turbine engines. These applications require operation at varying temperature conditions ranging from high to cryogenic temperatures. The main objective of this paper was to understand the behaviour of AMCs during thermal cycling, under induced thermal stresses and thermal fatigue. It also focuses on the various thermal properties of AMCs such as thermal conductivity and coefficient of thermal expansion (CTE). CTE mismatch between the reinforcement phase and the aluminium matrix results in the generation of residual thermal stress by virtue of fabrication. These thermal stresses increase with increasing volume fraction of the reinforcement and decrease with increasing interparticle spacing. Thermal cycling enhances plasticity at the interface, resulting in deformation at stresses much lower than their yield stress. Low and stable CTE can be achieved by increasing the volume fraction of the reinforcement. The thermal fatigue resistance of AMC can be increased by increasing the reinforcement volume fraction and decreasing the particle size. The thermal conductivity of AMCs decreases with increase in reinforcement volume fraction and porosity.

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“…As shown in Figure 12, the MMC exhibited a significant drop in fatigue performance compared to ambient temperature. The presence of large temperature gradients in the material, especially when applied in a cyclic manner, were observed to decrease the fatigue life of the MMC significantly over that of very small temperature gradient conditions (Klaska et al 2009). This trend was especially notable in short drawn fiber reinforcement MMCs ( Figure 12).…”

Section: Metal Matrix Compositesmentioning

confidence: 99%

Analysis of Lightweight Materials for the AM2 System

Allison¹,

Rushing²,

Garcia³

2014

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An analysis was performed on potential materials that could replace the 6061-T6 aluminum alloy currently used in the AM2 airfield matting for the purpose of light-weighting the design. An in-depth analysis was performed on metal and polymer matrix composites. However, neither groups of materials produced a suitable material based on operating conditions of the AM2. Newly developed extruded magnesium alloys were identified that could potentially provide weight savings of 30 to 40% while maintaining the current performance of the AM2. In addition, traditional high-strength aluminum alloys were identified that could provide substantial weight savings. However, manufacturing issues existed due to the high strength of these aluminum alloys. Finally, analysis was performed to determine the cost of manufacturing the AM2 using these alternate materials.

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Residual stress and damage development in the aluminium alloy EN AW-6061 particle reinforced with Al2O3 under thermal fatigue loading

Cited by 9 publications

References 40 publications

Influence of residual thermal stresses on fatigue crack growth life of discontinuous reinforcements in metal matrix composites

Influence of residual thermal stresses on fatigue crack growth life of discontinuous reinforcements in metal matrix composites

The behaviour of aluminium matrix composites under thermal stresses

Analysis of Lightweight Materials for the AM2 System

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