Atomic model for GP-zones in a 6082 Al–Mg–Si system

Marioara, Calin Daniel; Andersen, Sigmund Jarle; Jansen, J.C.; Zandbergen, H.W.

doi:10.1016/s1359-6454(00)00302-5

Cited by 305 publications

(178 citation statements)

References 11 publications

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“…In contract, the difference in matrix yield strength between rod-shaped and spherical particles becomes much larger if they are shearable, which is typical for precipitates in under-aged Al-Mg-Si alloys. [17] Referring again to Figure B3, a r p r / r p s ratio close to 0.45 means that the front part of the hardening curve for rod-shaped particles will drop significantly below the corresponding curve calculated from NaMo-Version 1 assuming spherical particles. This curve-shift visualizes the magnitude of the particle shape effect compared to other contributions under otherwise identical conditions.…”

Section: Effect Of Particle Shape On Obstacle Strength and Matrix Yiementioning

confidence: 80%

“…Figure B2 that the r p r /r p s strength ratio is only a weak function of the particle aspect ratio u within the range being reported for hardening b¢¢ and b¢ precipitates in Al-Mg-Si alloys. [17] Still, there is a significant difference in the absolute r p r /r p s ratio between shearable and non-shearable particles, which suggests that the shape effect is mainly related to the actual dislocation locking mechanism.…”

Section: Effect Of Particle Shape On Obstacle Strength and Matrix Yiementioning

confidence: 97%

“…The latter conclusion is supported by the fact that wiggles or kinks also appear in experimental artificial aging curves for Al-Mg-Si alloys which are based on hardness measurement. [17] Similarly, Figure 10 contains a compilation of all test results for Series B. This figure shows a plot of calculated RT yield stress vs measured yield stress for the different tensile tests referred to in Table VI.…”

Section: Yield Strength Data For Hot and Cold-rolled Aa6005 Plate Matmentioning

confidence: 99%

“…[11][12][13][14][15][16][17][18][19] In the past, the relevant structure-property relationships have been captured mathematically in the combined precipitation, yield strength (YS), and work-hardening (WH) model being developed by two of the authors. [20][21][22] Later, it has been renamed the nanostructure model (NaMo) in order to reach out to a wider audience and make the work accessible to people with a background in finite element simulations and advanced structural analyses as well.…”

Section: Introductionmentioning

confidence: 99%

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An Extended Age-Hardening Model for Al-Mg-Si Alloys Incorporating the Room-Temperature Storage and Cold Deformation Process Stages

Myhr

Grong

Schäfer

2015

Metall Mater Trans A

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In this article, a new age-hardening model for Al-Mg-Si alloys is presented (named NaMo-Version 2), which takes into account the combined effect of cold deformation and prolonged room-temperature storage on the subsequent response to artificial aging. As a starting point, the original physical framework of NaMo-Version 1 is revived and used as a basis for the extension. This is permissible, since a more in-depth analysis of the underlying particle-dislocation interactions confirms previous expectations that the simplifying assumption of spherical precipitates is not crucial for the final outcome of the calculations, provided that the yield strength model is calibrated against experimental data. At the same time, the implementation of the Kampmann-Wagner formalism means that the different microstructure models can be linked together in a manner that enforces solute partitioning and competition between the different hardening phases which form during aging (e.g., clusters, b¢¢ and b¢). In a calibrated form, NaMo-Version 2 exhibits a high degree of predictive power, as documented by comparison with experiments, using both dedicated nanostructure and yield strength data as a basis for the validation. Hence, the model is deemed to be well-suited for simulation of thermomechanical processing of Al-Mg-Si alloys involving cold-working operations like sheet forming and stretch bending in combination with heat treatment and welding.

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Section: Effect Of Particle Shape On Obstacle Strength and Matrix Yiementioning

confidence: 80%

Section: Effect Of Particle Shape On Obstacle Strength and Matrix Yiementioning

confidence: 97%

Section: Yield Strength Data For Hot and Cold-rolled Aa6005 Plate Matmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

An Extended Age-Hardening Model for Al-Mg-Si Alloys Incorporating the Room-Temperature Storage and Cold Deformation Process Stages

Myhr

Grong

Schäfer

2015

Metall Mater Trans A

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“…Al-Mg-Si alloys are widely used for demanding structural applications due to their good physical and chemical properties [1][2][3]. The alloy with the designation AA6082 is optimized to be the strongest alloy in the family.…”

Section: Introductionmentioning

confidence: 99%

Controlling the high temperature mechanical behavior of Al alloys by precipitation and severe straining

Cepeda-Jiménez

Castillo-Rodríguez

Molina-Aldareguia

et al. 2017

Materials Science and Engineering: A

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The aim of this work was to investigate the influence of the precipitate distribution on the microstructure and on the room and high temperature mechanical properties of an age-hardenable aluminium AA6082 alloy following severe straining by high-pressure torsion (HPT). With this goal, specimens in the as-cast and T6 peak-aged conditions were processed by HPT using 0.5, 1 and 5 turns at room temperature. At high strain levels (J>100), similar saturation grain sizes (~250 nm), high-angle boundary fractions (~80%) and hardness values (Hv~160) were obtained for both initial conditions. Grain refinement led to significant strengthening and to good ductility values at room temperature. Analysis by TEM and EDS elemental mapping revealed that HPT processing of the as-cast condition led to fracture of the stable E-phase into many small precipitates located preferentially along grain boundaries and triple junctions. By contrast, HPT processing of the T6 peak-aged specimens revealed a partial dissolution of the needle-shaped nanoprecipitates. The different evolutions of the precipitate distributions following straining in the as-cast and peak-aged conditions gave rise to dramatic differences in the mechanical properties and the operative deformation mechanisms at warm temperatures. These results provide evidence that the high temperature mechanical behavior of age-hardenable Al alloys may be conveniently controlled by altering the precipitate distribution followed by severe straining.

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The Effect of Artificial Aging Treatment on Microstructure and Tensile Properties of Al‐12.7Si‐0.7Mg Alloy

Liu

Zhao

et al. 2012

Light Metals 2012

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Atomic model for GP-zones in a 6082 Al–Mg–Si system

Cited by 305 publications

References 11 publications

An Extended Age-Hardening Model for Al-Mg-Si Alloys Incorporating the Room-Temperature Storage and Cold Deformation Process Stages

An Extended Age-Hardening Model for Al-Mg-Si Alloys Incorporating the Room-Temperature Storage and Cold Deformation Process Stages

Controlling the high temperature mechanical behavior of Al alloys by precipitation and severe straining

The Effect of Artificial Aging Treatment on Microstructure and Tensile Properties of Al‐12.7Si‐0.7Mg Alloy

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