An analytical study on strengthening of particulate reinforced metal matrix composites

Ramakrishnan, N.

doi:10.1016/1359-6454(95)00150-9

Cited by 318 publications

(139 citation statements)

References 30 publications

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“…In addition, we also add strengthening due to stress transfer to the intermetallic particles by applying the treatment in [51,52]. This contribution is also low, with typically about 1 % increase in yield strength for alloys with the higher Mn + Fe content.…”

Section: A Model For Strength/hardness Of Alloys T6 Aged After Coolingmentioning

confidence: 99%

Quench sensitivity of Al–Mg–Si alloys: A model for linear cooling and strengthening

Milkereit

Starink

2015

Materials & Design

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This work studies the quench-induced precipitation during continuous cooling of five Al-Mg-Si alloys over a wide range of cooling rates of 0.05 -2•10 4 K/min using Differential Scanning Calorimetry (DSC), X-ray diffraction, optical-(OM), transmission electron-(TEM) and scanning electron microscopy (SEM) plus hardness testing. The DSC data shows that the cooling reactions are dominated by a high temperature reaction (typically 500 °C down to 380 °C) and a lower temperature reaction (380 °C down to 250 °C), and the microstructural analysis shows they are Mg2Si phase formation and B' phase precipitation, respectively. A new, physically-based model is designed to model the precipitation during the quenching as well as the strength after cooling and after subsequent age hardening. After fitting of parameters, the highly efficient model allows to predict accurately the measured quench sensitivity, the volume fractions of quench induced precipitates, enthalpy changes in the quenched sample and hardness values. Thereby the model can be used to optimise alloy and/or process design by exploiting the full age hardening potential of the alloys choosing the appropriate alloy composition and/ or cooling process. Moreover, the model can be implemented in FEM tools to predict the mechanical properties of complex parts after cooling.

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Section: A Model For Strength/hardness Of Alloys T6 Aged After Coolingmentioning

confidence: 99%

Quench sensitivity of Al–Mg–Si alloys: A model for linear cooling and strengthening

Milkereit

Starink

2015

Materials & Design

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“…The contribution to the strength is small, up to 6 MPa for 6xxx alloys with the higher Mn and Fe contents (high Mn and Fe 6xxx alloys typically contain over 0.1at% of each element). In addition, we also add strengthening due to stress transfer to the intermetallic particles by applying the treatment in [37,38]. This contribution is also low, with typically about 1% increase in yield strength for alloys with the higher Mn + Fe content.…”

Section: Other Strengthening Mechanismsmentioning

confidence: 99%

A model for the thermodynamics of and strengthening due to co-clusters in Al–Mg–Si-based alloys

2012

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An expanded model for the thermodynamics of co-clusters and their strengthening is presented, and the model is applied to predict co-cluster formation and strengthening in AlMg-Si alloys. The models are tested against data on a wide range of Al-Mg-Si alloys aged at room temperature. The strengthening due to co-clusters is predicted well. The formation of the co-clusters is studied in an Al-0.5at%Mg-1at%Si alloy using three-dimensional atom probe analysis. The results correspond well with the model. It is shown that in general, (shortrange) order strengthening due to co-clusters will be the main strengthening mechanism in these alloys. Apart from the co-clusters, Si clusters also form, but due to their low enthalpy of formation, they contribute little to the strength.

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“…1(c)) is approximately 2 %. It is found that the "first" yield strength of the composites can be modeled by the load-bearing model: 12,22 …”

confidence: 99%

Correlation between the microstructures and the deformation mechanisms of CuZr-based bulk metallic glass composites

et al. 2013

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The variation of the transformation-mediated deformation behavior with microstructural changes in CuZr-based bulk metallic glass composites is investigated. With increasing crystalline volume fraction, the deformation mechanism gradually changes from a shear-banding dominated process as evidenced by a chaotic serrated flow behavior, to being governed by a martensitic transformation with a pronounced elastic-plastic stage, resulting in different plastic deformations evolving into a self-organized critical state characterized by the power-law distribution of shear avalanches. This is reflected in the stress-strain curves by a single-to-“double”-to-“triple”-double yielding transition and by different mechanical properties with different serrated flow characteristics, which are interpreted based on the microstructural evolutions and a fundamental energy theorem. Our results can assist in understanding deformation behaviors for high-performance metastable alloys

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An analytical study on strengthening of particulate reinforced metal matrix composites

Cited by 318 publications

References 30 publications

Quench sensitivity of Al–Mg–Si alloys: A model for linear cooling and strengthening

Quench sensitivity of Al–Mg–Si alloys: A model for linear cooling and strengthening

A model for the thermodynamics of and strengthening due to co-clusters in Al–Mg–Si-based alloys

Correlation between the microstructures and the deformation mechanisms of CuZr-based bulk metallic glass composites

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