Some aspects on workability of aluminium–iron powder metallurgy composite during cold upsetting

Narayanasamy, R.; Ramesh, T.; Pandey, K.S.

doi:10.1016/j.msea.2004.09.018

Cited by 70 publications

(49 citation statements)

References 17 publications

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“…The expressions for the normal stress (σz), normal strain (ɛz), hoop stress (σθ), hoop strain (ɛθ), hydrostatic stress (σm), effective stress (σeff), and effective strain (ɛeff) were taken from Selvakumar et al [7] and Narayanasamy et al [8].…”

Section: Theoretical Analysismentioning

confidence: 99%

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Simulation studies on the densification behaviour of sintered aluminium preforms

Ahasan¹,

Davidson²,

Khanra³

2013

uujms

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The densification behavior of sintered aluminium has been investigated by performing simulation studies using DEFORM 2D software. The results have been compared with the experimental values. The deformation characteristics of the sintered preforms have been studied and the relationship between the various stresses such as true stress, true strain, hoop stress, hoop strain, hydrostatic stress, hydrostatic strain, effective stress, effective strain and relative density in both the experimental and simulations has been discussed for uniaxial, plane stress and triaxial stress state conditions. A good agreement is found between the experimental and simulation results.

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Section: Theoretical Analysismentioning

confidence: 99%

“…Narayanasamy et al [8] have studied the strain hardening behaviour of aluminium-iron powder composite preforms. The authors performed experiments on sintered powders of three different aspect ratios, different compositions of Fe and three different particle sizes.…”

Section: Introductionmentioning

confidence: 99%

Simulation studies on the densification behaviour of sintered aluminium preforms

Ahasan¹,

Davidson²,

Khanra³

2013

uujms

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“…The compact pressure was maintained for all composition of SiC composites to maintain the 92% relative density level. The green compact surfaces were coated with an indigenously developed ceramic mixture [21] and dried under room-temperature conditions for a period of 9 h. A second coating was applied at a direction of 90°to the direction of first coating and was allowed to dry for a further period of 9 h under the same conditions as stated above.…”

Section: Compacts Preparationmentioning

confidence: 99%

“…1 Photographs of hydraulic press and parts of compacting die tool Fig. 2 The SEM photograph of as sintered Al-20% SiC at 605°C at 3 h [21,22], Fe [23], Fe-TiC [24] and Al-SiC [25] composites during cold upsetting.…”

Section: Introductionmentioning

confidence: 99%

Effect of sintering temperature and time intervals on workability behaviour of Al–SiC matrix P/M composite

Raj¹,

Marimuthu

Prabhakar³

et al. 2011

Int J Adv Manuf Technol

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The investigation on the effect of sintering temperature and time intervals on workability behaviour of Al-SiC powder metallurgy composites during cold upsetting was attempted in the present work. Three levels of sintering temperature and time have been considered to evaluate their effect on workability behaviour. The amount of SiC reinforcement content has been varied as 0%, 10% and 20%. The experimental results were analyzed for workability under triaxial stress state condition as a function of the relative density. The Formability Stress Index (β σ ), the Formability Strain Index (β ε ), stress ratio parameters namely σ θ /σ eff and σ z /σ m were obtained for all the cases. As a result, the exhibited tremendous variations in the various parameters for different sintering temperatures and time intervals were studied and reported.

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“…They also reported that, the workability of a material purely depends on the amount of ductile fracture presented in the material 24 . The workability behavior for various ferrous and non-ferrous alloys and composites (Al-3.5%Al 2 [25][26][27][28][29][30] . In the present study, Al matrix composites with 2.5 weight percentage of TiO 2 and 2 & 4 weight percentage of graphite was synthesized through powder metallurgy route.…”

Section: Introductionmentioning

confidence: 99%

Workability studies on Al+2.5%TiO2+Gr powder metallurgy composites during cold upsetting

Ravichandran¹,

Sait²,

Anandakrishnan

2014

Mat. Res.

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Al+2.5%TiO 2 +Gr composites were synthesized through powder metallurgy technique and their workability behavior has been studied under tri-axial stress state condition. The powders were compacted using suitable punch and die in 400 kN hydraulic press and sintered at a temperature of about 590 °C for a period of 3 hours in an electric muffle furnace. The sintered preforms were characterized by XRD and SEM analysis. Then the preforms were subjected to incremental compressive loading of 10 kN until the cracks found at the free surface. The true axial stress (s z ), true hoop stress (s ө ), true hydrostatic stress (s m ) true effective stress (s eff ), formability stress index (β) and stress ratio parameters [(s z /s eff ), (s m /s eff ), (s ө /s eff )] were calculated for all the preforms and these are correlated with the true axial strain (e z ). It is inferred that, the addition of TiO 2 and Gr to the Al matrix material increases the stress ratio parameters and formability stress index (β). A hardness test was also conducted for sintered and cold forged preforms and results are reported.

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Some aspects on workability of aluminium–iron powder metallurgy composite during cold upsetting

Cited by 70 publications

References 17 publications

Simulation studies on the densification behaviour of sintered aluminium preforms

Simulation studies on the densification behaviour of sintered aluminium preforms

Effect of sintering temperature and time intervals on workability behaviour of Al–SiC matrix P/M composite

Workability studies on Al+2.5%TiO2+Gr powder metallurgy composites during cold upsetting

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