Modeling of the metal powder compaction process using the cap model. Part I. Experimental material characterization and validation

Chtourou, Hédi; Guillot, Michel; Gakwaya, A.

doi:10.1016/s0020-7683(01)00255-4

Cited by 98 publications

(47 citation statements)

References 9 publications

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“…Accordingly, many studies used the indentation hardness as a characterization method of mechanical properties of compacts (Bonaccorsi and Proverbio, 2006;Chtourou et al, 2002;Kuppuswamy et al, 2001;Tehrani et al, 2010) as well as an evaluation metrics of a compaction process (Chtourou et al, 2002).…”

Section: Quality: Hardnessmentioning

confidence: 99%

Critical Review on Engineering Mechanical Quality of Green Compacts using Powder Properties

Pandeya²,

Karamchandani

et al. 2018

KONA

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For processes involving particulate materials, mechanical properties of green compacts are of great interest when they are final or intermediate products. Optimal quality of green compacts is achieved usually with empirical approaches, i.e., unexpected issues in processes or products' quality are usually mitigated by time and resource consuming trial-and-error methods. Issues of the powder compaction are commonly observed when there are problems in feed materials or operational conditions even without any substantial change in a formula. Such divergent behavior of particulate materials is especially problematic for product developments and reliable operations. It has been widely accepted hypothesis that properties of particles are determinants of mechanical behavior of powder during compaction and the quality of resulting compacts. With recent developments in nanotechnology, characterization and engineering of individual particles at a microscopic or sub-microscopic scale are now feasible. Leveraging recent technological advancements, there has been a good progress in regard to quantitative understanding of mechanical relationships between properties of particles, particle system and final product. This review highlights the recent developments and gaps in engineering mechanical quality of powder compacts in conjunction with the characterization of particle systems and compaction at multiple scales.

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Section: Quality: Hardnessmentioning

confidence: 99%

Critical Review on Engineering Mechanical Quality of Green Compacts using Powder Properties

Pandeya²,

Karamchandani

et al. 2018

KONA

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“…At elevated temperatures, plastic deformation becomes the dominant mechanism. The liquid phase was formed at the hot pressing temperature and consolidation was further enhanced, by the isostatic action of the compressive stresses on the compact inside the dies [26,34,35]. Additionally, diffusion rates were increased through enhancing the liquid phase and densification, by good wetting between liquid and solid components of the alloy system.…”

Section: Hardness and Radial Crushing Strengthmentioning

confidence: 99%

Characteristics of Cold and Hot Pressed Iron Aluminum Powder Metallurgical Alloys

Nassef

El-Garaihy

El-Hadek

2017

Metals

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Iron powders having average particle sizes of~40 µm are mechanically mixed thoroughly with aluminum powders ranging from 1 to 10 in wt. %, with an average particle size of~10 µm. Two different powder metallurgy (PM) techniques, cold and hot pressing, are used to study the effect of the additive element powder on the mechanical properties, wear properties, and the microstructure of the iron based alloys. The hot pressing technique was performed at a temperature reaching up to 500 • C at 445.6 MPa. The cold pressing technique was performed at 909 MPa at room temperature. By increasing the Al content to 10 wt. % in the base Fe-based matrix, the Brinell hardness number was decreased from 780 to 690 and the radial strength from 380 to 228 MPa with reductions of 11.5% and 40%, respectively. Improvement of the wear resistance with the increase addition of the Al powder to the Fe matrix up to five times was achieved, compared to the alloy without Al addition for different wear parameters: wear time and sliding speed.

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“…Several researchers have proposed and utilized finite element schemes for problems of large displacements [26][27][28][29][30][31] which include diverse formulations of both the Eulerian and Lagrangian type. In Eulerian procedure, the physical quantities are expressed as a function of time and position vector in the geometric space.…”

Section: Literature Reviewmentioning

confidence: 99%

Development of a finite element model of metal powder compaction process at elevated temperature

Rahman

Ariffin

Nor

2009

Applied Mathematical Modelling

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a b s t r a c tThis paper presents the finite element modelling of metal powder compaction process at elevated temperature. In the modelling, the behaviour of powder is assumed to be rate independent thermo-elastoplastic material where the material constitutive laws are derived based on a continuum mechanics approach. The deformation process of metal powder has been described by a large displacement based finite element formulation. The Elliptical Cap yield model has been used to represent the deformation behaviour of the powder mass during the compaction process. This yield model was tested and found to be appropriate to represent the compaction process. The staggered-incremental-iterative solution strategy has been established to solve the non-linearity in the systems of equations. Some numerical simulation results were validated through experimentation, where a good agreement was found between the numerical simulation results and the experimental data.

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Modeling of the metal powder compaction process using the cap model. Part I. Experimental material characterization and validation

Cited by 98 publications

References 9 publications

Critical Review on Engineering Mechanical Quality of Green Compacts using Powder Properties

Critical Review on Engineering Mechanical Quality of Green Compacts using Powder Properties

Characteristics of Cold and Hot Pressed Iron Aluminum Powder Metallurgical Alloys

Development of a finite element model of metal powder compaction process at elevated temperature

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