A study of a new phenomenological compacting equation

Panelli, Renato; Filho, Francisco Ambrozio

doi:10.1016/s0032-5910(00)00207-2

Cited by 144 publications

(80 citation statements)

References 7 publications

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“…The quality of the green compact, in turn, is determined by the densification mechanisms and the behavior of the powder during compaction. [4,5] Several studies in literature have established relationships between the compaction pressure, the powder characteristics (such as impurity levels and particle size shape), different compaction route (cold, hot, or dynamic compaction), and the obtained properties of the compacts (density, sinterability and strength) with varying degrees of success. [1,2,[6][7][8][9][10][11][12][13][14][15][16][17][18] Studies into the cold compaction of titanium and titanium-based powder materials are necessitated by fact that titanium PM also offers improved chemical homogeneity and refined microstructures [2] in addition to a cost and energy-consumption reduction benefit-given the high cost of titanium powder material.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Cold Compaction Behavior of Titanium Powders: A Comprehensive Inter-model Comparison Study of Compaction Equations

Machaka

Chikwanda

2015

Metall Mater Trans A

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A brief background to compaction equations and their application to titanium powder is presented. The behavior and mechanisms of densification in selected titanium powders is critically analyzed by means of a comprehensive inter-model comparison of existing compaction equations. The results are discussed in terms of the comparative evaluation of cold uniaxial compaction tests of sponge Ti, CP TiH 2 , CP Grade 2 Ti, and TiH 2 -SS316L nanocomposite powder samples, which were conducted at applied compaction pressures of up to 1250 MPa.

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Section: Introductionmentioning

confidence: 99%

Analysis of the Cold Compaction Behavior of Titanium Powders: A Comprehensive Inter-model Comparison Study of Compaction Equations

Machaka

Chikwanda

2015

Metall Mater Trans A

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“…This is a cause for considerable difficulties when modelling the compaction process. Numerous references in the literature relate to modelling of metals, ceramic or pharmaceutical powders, or chemical materials (Chevanan et al, 2010;Feng et al, 2007;Haware et al, 2009;Paneli and Filho, 2001;Souriou et al, 2009). Equations have often been presented which set the dependencies between the load used (pressure) and the physical properties of powder, pressure vs. specific volume, and internal stress vs. material deformation.…”

Section: Introductionmentioning

confidence: 99%

Models of pressure compaction and their application for wheat meal

Skonecki¹,

Kulig²,

Łysiak³

2014

International Agrophysics

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A b s t r a c t. Processes of compaction of granular materials were described using selected models. The analysis of their accuracy on the example of wheat was the basis for the discussion on their applicability to the processing of plant-origin materials. Parameters of the model equations for wheat, compressed at 10-18% moisture content were calculated, and the relations between these parameters and wheat moisture were determined. It was found that the analyzed models described the pressure compaction of granular plant material with different accuracy, and were highly dependent on moisture. The study also indicated that the model of Ferrero et al. fits the experimental results well. The parameters of this model reflected very well the physical phenomena which occur during compression.K e y w o r d s: pressure compaction models, wheat meal, moisture

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“…Other authors have proposed numerous additional equations. [19][20][21] In his classic text Powder Metallurgy Science, [6] Randall German lists nine other equations. However, neither Kawakita nor German provides an evaluation of the validity of the various equations.…”

Section: Introductionmentioning

confidence: 99%

Compaction of Titanium Powders

Gerdemann

Jablonski

2010

Metall Mater Trans A

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Accurate modeling of powder densification has been an area of active research for more than 60 years. The earliest efforts were focused on linearization of the data because computers were not readily available to assist with curve-fitting methods. In this work, eight different titanium powders (three different sizes of sponge fines <150 lm, <75 lm, and < 45 lm; two different sizes of a hydride-dehydride [HDH]<75 lm and<45 lm; an atomized powder; a commercially pure [CP] Ti powder from International Titanium Powder [ITP]; and a Ti 6 4 alloy powder) were cold pressed in a single-acting die instrumented to collect stress and deformation data during compaction. From these data, the density of each compact was calculated and then plotted as a function of pressure. The results show that densification of all the powders, regardless of particle size, shape, or chemistry, can be modeled accurately as the sum of an initial density plus the sum of a rearrangement term and a work-hardening term. These last two terms are found to be a function of applied pressure and take the form of an exponential rise.

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A study of a new phenomenological compacting equation

Cited by 144 publications

References 7 publications

Analysis of the Cold Compaction Behavior of Titanium Powders: A Comprehensive Inter-model Comparison Study of Compaction Equations

Analysis of the Cold Compaction Behavior of Titanium Powders: A Comprehensive Inter-model Comparison Study of Compaction Equations

Models of pressure compaction and their application for wheat meal

Compaction of Titanium Powders

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