Hot Deformation Behaviors of Cu/Al Laminated Composites

Liu, Shuaiyang; Wang, Aiqin

doi:10.1088/1757-899x/381/1/012162

Cited by 2 publications

(3 citation statements)

References 12 publications

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“…So that the mechanism of dynamic softening starts at a certain strain, then flow stress exhibits a dropping tendency and reach stable conditions with an increase of strain as reported by Liu and Wang. 12 At higher deformation temperature 450°C, the isothermally activated process strongly controls the hot deformation process, atomic movement and dislocation slip become easy. Thus, at peak flow stress, the softening mechanism initiated.…”

Section: Resultsmentioning

confidence: 99%

“…It was observed that at similar working conditions, with an increase of Cu content in composite the densification increased. Liu and Wang 12 investigated the influence of bonding interface depends upon strain rate as well as deformation temperature through hot deformation of Cu/Al laminated composites. They found that to attain interface coordination during deformation the hard copper layer should produce a higher tension on the adjacent soft aluminium layer to increase the dislocation slip resistance significantly.…”

Section: Introductionmentioning

confidence: 99%

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Formability and densification behavior of two-layered structure powder metallurgical hot-pressed Al-Cu/Al composites during hot-upsetting

Rajasekhar

Babu

Davidson

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part E:

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An experimental investigation has been performed on the hot formability and densification characteristics of Al-Cu/Al two-layered structure composites. The two-layered composites having different Cu compositions in the Al-Cu layer such as (Cu: 5wt. %, 10wt. %, and 15wt. %) were prepared using the powder metallurgy (P/M) route. The composites were hot-pressed as layer by layer in a steel cylindrical die at 550°C temperature with 0.9 initial relative density (IRD) and 0.1 s−1 strain rate. The preforms were hot deformed between two flat dies with a capacity of 50-ton hydraulic press machine at a temperature range of 150°C – 450°C under triaxial stress state condition. The hot-upsetting behaviour of preforms was analyzed until the cracks begin on the cylindrical preform at the outer surface. The effect of different Cu composition and various deformation temperatures on two-layered preforms were discussed. Results revealed that the (10wt. %Cu) preform achieved good cooperative deformation behaviour between Al-Cu and Al layers at the interface region. The relationship between the process parameters was discussed such as the effect of axial stress ([Formula: see text]), relative density ( R) on axial strain ([Formula: see text]) and formability stress index ( β), different stress ratio parameters ([Formula: see text], [Formula: see text]) on relative density ( R).

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Formability and densification behavior of two-layered structure powder metallurgical hot-pressed Al-Cu/Al composites during hot-upsetting

Rajasekhar

Babu

Davidson

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part E:

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show abstract

“…With proper extension of blade inlet and by enlarging the blade inlet angle along with the optimal slots the new impeller design leads to significant improvement in the pump cavitation performance [9,10]. An optimum value for vane rake angle for obtaining superior cavitation performance was proposed [11]. Based on the genetic algorithm and CFD simulation improved design for blade thickness and leading-edge ellipse ratio was also proposed [12].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Geometric Parameters for Impeller Design in an Axial Flow Pump

2023

ecb

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This work is mainly concentrated on increasing the efficiency (η) and reducing the Net Positive Suction Head (NPSH) required by optimizing the design through the geometrical parameters involved. Blade thickness, Chord cascade solidity, chord angle and hub angle are the geometric variables evaluated. In order to establish the relation between the geometrical parameters and the objective functions (η and NPSH), a statistical approach in the form of ANOVA and RSM is used and the DOE is performed using Taguchi method. The data for the geometrical parameters were selected based on the technical values commonly used in the present impeller design. The values of objective functions for the analysis were taken from the calculations done using simulation results using appropriate equations. The effect of geometrical parameters on the objective functions is analysed and the optimization of parameters is carried out using RSM in Minitab software. .

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Hot Deformation Behaviors of Cu/Al Laminated Composites

Cited by 2 publications

References 12 publications

Formability and densification behavior of two-layered structure powder metallurgical hot-pressed Al-Cu/Al composites during hot-upsetting

Formability and densification behavior of two-layered structure powder metallurgical hot-pressed Al-Cu/Al composites during hot-upsetting

Optimization of Geometric Parameters for Impeller Design in an Axial Flow Pump

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