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On a Powder Consolidation Problem

C. T. Kelley, Kristy A. Coffey, Pierre A. Gremaud, T. A. Royal
2001 SIAM Journal on Applied Mathematics  
The problem of the consolidation of an aerated fine powder under gravity is considered. The industrial relevance of the problem is discussed and a mathematical model is introduced.  ...  Existence and uniqueness of a solution is established. A numerical method based on a formulation of the semidiscretized problem as an index 1 DAE is proposed and implemented.  ...  One then speaks of fluidization, and the air-powder system essentially behaves as a liquid. This paper is concerned with the "opposite" phenomenon: consolidation.  ... 
doi:10.1137/s0036139900368479 fatcat:ywrrpjnndzg3blbkk4vdgq3cxa

Page 1 of Journal of Aircraft Vol. 14, Issue 7 [page]

1977 Journal of Aircraft  
A serious problem in some P/M superalloys is the for- mation of MC on prior powder particle boundaries (PPB)° in the consolidated material.  ...  The MC at PPB in the consolidated material is a result of dissolving the finely dispersed MC particles during the heat-up before consolidation and reprecipitating MC on the powder surface.  ... 

International Conference on Synthesis and Consolidation of Powder Materials

2019 IOP Conference Series: Materials Science and Engineering  
-Tensile strength of materials obtained by electric pulse consolidation of powders V Y Goltsev, E G Grigor'ev, N A Gribov et al.  ...  You may also like Features of shock pressing and electroimpulse heating during consolidation of a powder material R L Plomodyalo, E G Grigor'ev, L I Svistun et al.  ...  Both processes, synthesis and consolidation, can be performed in one stage.  ... 
doi:10.1088/1757-899x/558/1/011001 fatcat:vu4mdk5suvezrf6633jn2ifsri

Microstructurally-based analysis and computational modeling of shock consolidation

S. S. Shang, D. J. Benson, M. A. Meyers
1994 Journal de Physique IV : Proceedings  
An analytical expression is proposed for the energy requirement to shock consolidate a powder as a function of strength, size, porosity, and temperature, based on a prescribed interparticle melting layer  ...  Based on the Analysis and computations, the inherent limitations of shock consolidation are identified and discussed. Article published online by EDP Sciences and available at http://dx.  ...  A model boundary value problem was used to simulate the propagation of the shock wave through the powder.  ... 
doi:10.1051/jp4:1994881 fatcat:33bdshqbtrbolhjsd77ohhxjry

A New Uniaxial Compression Tester: Development and Application

Hamid Salehi, Robert Berry, Richard Farnish, Michael Bradley
2019 Chemical Engineering Transactions  
A method in the style of Janssen approach for correcting wall friction effect on the compaction stress of UCT was applied.  ...  Powder flow characterization with some of the conventional shear testers can be costly, time consuming and requires a trained operator, therefore the application of a cheaper, simpler, and sometimes faster  ...  Acknowledgments We thank the British Engineering and Physical Sciences Research Council (EPSRC) for providing funding for this work through a grant for the project "Virtual Formulation Laboratory (VFL)  ... 
doi:10.3303/cet1974078 doaj:c526350a0f004765ab230c33b1be6ae9 fatcat:4xuqcqazjva63nkqrc3ikpkfki

Investigation of laser consolidation process for metal powder by two-color pyrometer and high-speed video camera

Tatsuaki Furumoto, Takashi Ueda, Mohd Rizal Alkahari, Akira Hosokawa
2013 CIRP annals  
Investigation of laser consolidation process for metal powder by two-color pyrometer and high-speed video camera.  ...  Investigation of laser consolidation process for metal powder by two-color pyrometer and high-speed video camera. CIRP Annals -Manufacturing Technology (2013), http://dx.  ...  This equipment was a self-designed consolidated system composed of laser equipment and consolidation facility of a metal powder.  ... 
doi:10.1016/j.cirp.2013.03.032 fatcat:7ibiovimbrhhxgyp7zbyli62pi

Consolidation characteristics of ferrous-based metal powder in additive manufacturing

Mohd Rizal ALKAHARI, Tatsuaki FURUMOTO, Takashi UEDA, Akira HOSOKAWA
2014 Journal of Advanced Mechanical Design, Systems, and Manufacturing  
A high-speed camera was utilized with telescopic lenses in order to monitor the interaction of laser and material within the powder fusion zone (PFZ).  ...  Based on the study, the line consolidation can be classified into five different consolidation types.  ...  This ball-shaped consolidated agglomerate, which is also well known as balling phenomena in SLS/SLM, is one of the most common problems in SLS/SLM.  ... 
doi:10.1299/jamdsm.2014jamdsm0009 fatcat:5seewpm6p5gtxgehgo5ybpkl74

Structure Controlled Mg Alloy as Anode for Magnesium-air Battery Via Pressure-less Sintering Technique

Sangwon SEO, Donghyun KIM, Jaehyo PARK, Dongjin KIM
2019 DEStech Transactions on Computer Science and Engineering  
Magnesium-air batteries have been considered as a promising electrochemical energy storage device because Mg is known as element on the earth crust, has a high reactivity and relatively high safety and  ...  Despite a relative high voltage and energy density of the Mg-air batteries, there are several problems such as high polarization and low coulombic efficiency.  ...  To consolidate magnesium anode which has a high specific surface area, sintering temperature were reduced intentionally compared with normal sintering condition of magnesium.  ... 
doi:10.12783/dtcse/ammms2018/27304 fatcat:ar3s5irql5h3jkepbbja4wcpdi

ECAP - new consolidation method for production of aluminium matrix composites with ceramic reinforcement

Mateja Snajdar-Musa, Zdravko Schauperl
2013 Processing and Application of Ceramics  
Among those techniques equal channel angular pressing (ECAP) stands out due to its beneficial influence on the main problem that arises during powder compaction and that is a non-uniform distribution of  ...  This paper gives an overview on ECAP method principles, advantages and produced powder composite properties.  ...  Many analyses conducted by Mohseni, Balog, Athreya etc. of Al based MMCs consolidation characteristics and their obtained properties showed ECAP to be a good method for solving consolidation problems  ... 
doi:10.2298/pac1302063s fatcat:ivzleltrqjb4jaxagv77hww2de

New processing for recycling of iron scrap by consolidation of Fe-Cu alloy rapid solidified powder

Kazumi MINAGAWA, Hideki KAKISAWA, Minoru OTAGUCHI, Kohmei HALADA
2001 Journal of Advanced Science  
For this idea, the combination of powder metallurgical methods, a Cu-super saturated Fe powder preparation and consolidation of it at a temperature where no Cu liquid phase appears is  ...  The powder is consolidated with severe plastic deformation at 873-1273K.  ... 
doi:10.2978/jsas.13.336 fatcat:tnqx4n5pvrgwzbtv3fune2r3wm

Shock consolidation: microstructurally-based analysis and computational modeling

M.A. Meyers, D.J. Benson, E.A. Olevsky
1999 Acta Materialia  
An analytical expression is developed for the energy requirement to shock consolidate a powder as a function of strength, size, porosity, and temperature, based on a prescribed interparticle melting layer  ...  AbstractÐThe most important microstructural processes involved in shock consolidation are identi®ed and discussed; the energy dissipated by a shock wave as it traverses a powder is assessed.  ...  A model boundary value problem was used to simulate the propagation of the shock wave through the powder.  ... 
doi:10.1016/s1359-6454(99)00083-x fatcat:4ykridmfxrasrkcw7s67by2qxm

A study of the mechanism of consolidating metal powder under explosive‐implosive shock waves

Juxian Gao, Binghuang Shao, Ke Zhang
1991 Journal of Applied Physics  
Based on these experiments, a physical model for metal powder shock consolidation has been I established. 7547  ...  A study of the two-dimensional flow pattern of particles in consolidation process under explosive-implosive shock waves has been performed to further understand the mechanism of shock-wave consolidation  ...  The mechanism of powder consolidation under explosive-implosive shock waves is a very complex problem.  ... 
doi:10.1063/1.347572 fatcat:rg54vfhzfzegfl6qbf7y7ff3ia

The Sevilla Powder Tester: A Tool for Characterizing the Physical Properties of Fine Cohesive Powders at Very Small Consolidations

A. Castellanos, J.M. Valverde, M.A.S. Quintanilla
2004 Kona : Powder and Particle  
Besides being a practical tool to diagnose the flowability of experimental powders, the Sevilla Powder Tester (SPT) also provides us with a powerful technique to research fundamental problems in powder  ...  Then the gas flow is set to a given value to take the powder into a well defined and reproducible initial state of low consolidation. Reverse flow is used to exert high compressive stress.  ...  Genovesse, A. Ramos, and A. T. Perez for their valuable contributions to this work.  ... 
doi:10.14356/kona.2004011 fatcat:kujgcpm44bhfzf55omwxczshha

Outside Mainstream Electronic Databases: Review of Studies Conducted in the USSR and Post-Soviet Countries on Electric Current-Assisted Consolidation of Powder Materials

Eugene Olevsky, Elena Aleksandrova, Alexandra Ilyina, Dina Dudina, Alexander Novoselov, Kirill Pelve, Eugene Grigoryev
2013 Materials  
This paper reviews research articles published in the former USSR and post-soviet countries on the consolidation of powder materials using electric current that passes through the powder sample and/or  ...  a conductive die-punch set-up.  ...  of powder rolling; the influence of the applied voltage on the consolidation process was also discussed.  ... 
doi:10.3390/ma6104375 pmid:28788337 pmcid:PMC5452841 fatcat:ecn3fpq6dze5pdng4xrxphsbsm

Shape memory characteristics of powder metallurgy processed Ti50Ni50 alloy

Yeon-wook Kim, Kyung-su Jeon
2010 Physics Procedia  
Ti 50 Ni 50 shape memory alloy powders were prepared by inert gas atomization and the powders were consolidated by spark plasma sintering (SPS) to fabricated dense bulk samples.  ...  Martensitic transformation temperatures and microstructures of the asatomized powders and the consolidated disks were investigated.  ...  One way to overcome these problems is to synthesize the near-net-shape TiNi alloys bulks from the alloy powders.  ... 
doi:10.1016/j.phpro.2010.11.068 fatcat:ibe2hiwubndabpty2wfflzkob4
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