A microstructure-based yield stress and work-hardening model for textured 6xxx aluminium alloys

The predictions from a grain cluster deformation texture model, GIA, are utilized to study the nucleation texture of recrystallisation of aluminium alloys. In combination with a dislocation based work hardening model, the propensity of specific grains in their granular environment for select nucleation mechanisms is investigated. Quantitative criteria for the nucleation events can be formulated. The results can be fed into a growth model of recrystallisation to predict recrystallisation textures and lend themselves to through-process modelling.

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A work-hardening model of the lower yield strength of discontinuously yielding alloys: Ni3Al and mild steel

Journal of Materials Research ◽

10.1557/jmr.1989.0470 ◽

1989 ◽

Vol 4 (3) ◽

pp. 470-472 ◽

Cited By ~ 7

Author(s):

E. M. Schulson

Keyword(s):

Grain Size ◽

Yield Strength ◽

Mild Steel ◽

Work Hardening ◽

Lower Yield ◽

Hardening Model ◽

Lower Yield Strength ◽

Work Hardening Model ◽

Lüders Bands

The lower yield strengths of Ni3Al and mild steel and their respective relationships to (grain size)−0.8 and (grain size)−0.5 are explained in terms of work hardening within Lüders bands.

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Modelling the Recrystallization Behaviour during Industrial Processing of Aluminium Alloys

Materials Science Forum ◽

10.4028/www.scientific.net/msf.715-716.543 ◽

2012 ◽

Vol 715-716 ◽

pp. 543-548 ◽

Cited By ~ 3

Author(s):

Knut Marthinsen ◽

Jesper Friis ◽

Bjørn Holmedal ◽

Inge Skauvik ◽

Trond Furu

Keyword(s):

Dislocation Density ◽

Aluminium Alloys ◽

Alloy Composition ◽

Subgrain Size ◽

Composition Profile ◽

Hardening Model ◽

Subsequent Recovery ◽

Industrial Processing ◽

Work Hardening Model ◽

Particle Paths

The microstructure evolution in commercial AlMgSi alloys during and after extrusion of a simple U-shaped profile has been modelled. The strain, strain rate and temperature along a set of particle paths are taken from FE-HyperXtrude simulations and used as input to the work hardening model ALFLOW, to predict the evolution of the subgrain size and dislocation density during deformation. As soon as the profile leaves the die, the subsequent recovery and recrystallization behaviour is modelled with the softening model ALSOFT. This procedure enables the modelling of recrystallization profiles, i.e. the fraction recrystallized through the wall thickness of the extruded profile. The sensitivity to chemistry (alloy composition), profile deflection and the cooling rate at the die exit has been investigated by means of a set of generic modelling cases.

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Elastic-plastic work-hardening model for soft clays

International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts ◽

10.1016/0148-9062(85)93004-9 ◽

1985 ◽

Vol 22 (4) ◽

pp. 114

Keyword(s):

Work Hardening ◽

Plastic Work ◽

Hardening Model ◽

Soft Clays ◽

Elastic Plastic ◽

Work Hardening Model

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Work Hardening Behaviour of Heat-Treatable Al-Mg-Si-Alloys

Materials Science Forum ◽

10.4028/www.scientific.net/msf.519-521.1901 ◽

2006 ◽

Vol 519-521 ◽

pp. 1901-1906 ◽

Cited By ~ 17

Author(s):

Jesper Friis ◽

Bjørn Holmedal ◽

Øyvind Ryen ◽

Erik Nes ◽

Ole R. Myhr ◽

...

Keyword(s):

Field Theory ◽

Work Hardening ◽

Metal Matrix ◽

Mean Field Theory ◽

Mean Field ◽

Heat Treatments ◽

Stress Strain ◽

Hardening Model ◽

Work Hardening Model ◽

Strain Responses

The work hardening of alloys hardened by precipitate heat treatments depends on the distribution of the precipitate sizes and the solute level left in the metal matrix. A mean field theory for precipitation is first applied for the ageing and subsequently it is coupled to a work hardening model to study the stress-strain responses of age hardened conditions of AA6xxx alloys. The predictions are compared to mechanical experiments and to TEM characterisations.

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