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Densification behavior of 316L stainless steel powder under high temperature
Ki-Tae Kim,Y.C Jeon +1 more
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In this paper, the authors investigated the deformation behavior of 316L stainless steel powder during pressureless sintering, sinter forging and hot isostatic pressing and compared with finite element calculations.Abstract:
Densification behavior of 316L stainless steel powder was investigated during pressureless sintering, sinter forging and hot isostatic pressing. Experimental data were compared with finite element calculations by using the constitutive models of Abouaf and co-workers and of McMeeking and co-workers. Densification of a stainless steel powder compact in a stainless steel container was studied under hot isostatic pressing. Due to the shield effect of the container, inhomogeneous deformation of 316L stainless steel powder compacts was observed in experiment and also predicted by a finite element analysis.read more
Citations
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Challenges and advances in nanocomposite processing techniques
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Synthesis of a Nanoporous Polymer with Hexagonal Channels from Supramolecular Discotic Liquid Crystals
TL;DR: Hydrogen-bonding interactions between a benzotri(imidazole) derivative and a polymerizable alkoxybenzoic acid result in the formation of a supramolecular hexagonal columnar liquid crystal.
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Hydroxyapatite as a new solid support for the Knoevenagel reaction in heterogeneous media without solvent
TL;DR: In this article, the Knoevenagel condensation is easily carried out without a solvent at room temperature using hydroxyapatite (HAP) using water and benzyltriethylammonium chloride (BTEAC).
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Natural phosphate doped with potassium fluoride and modified with sodium nitrate: efficient catalysts for the Knoevenagel condensation
TL;DR: In this article, a high yield synthesis of activated alkenes was described using the inexpensive natural phosphate alone, doped with potassium fluoride or modified by sodium nitrate, which was carried out in mild conditions at room temperature in methanol.
Journal ArticleDOI
Porosity control in 316L stainless steel using cold and hot isostatic pressing
TL;DR: In this article, the porosity control of capsule-free powder hot isostatic pressing (CF-HIPing) of 316L stainless steel was investigated, and the results showed a significant increase in the pore fraction of the samples by increasing the particle size of the powder.
References
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Metal Forming and the Finite-Element Method
TL;DR: In this paper, the finite element method was used to analyze the metal forming process and its properties, including plasticity, viscoplasticity, and plane-strain problems.
Journal ArticleDOI
Plasticity theory for porous metals
Susumu Shima,M. Oyane +1 more
TL;DR: In this paper, a plasticity theory for porous metals is proposed and the stress-strain curves for sintered copper with various apparent densities are calculated by utilizing the basic equations.
Journal ArticleDOI
Hot isostatic pressing diagrams : new developments
TL;DR: In this paper, the equations and procedures for constructing hot-isostatic pressing diagrams are greatly simplified and clarified, and two further mechanisms are added: diffusional deformation of the particles themselves when the grain size is much smaller than the particle size, and the separation of pores from boundaries when grain growth occurs.
Journal ArticleDOI
Pressure sintering by power law creep
David Wilkinson,Michael F. Ashby +1 more
TL;DR: In this article, the contribution of power-law creep to the final stage densification of a powder compact is investigated, and it is modelled by considering the voids as spherical holes surrounded by a thick cylindrical shell of solid material which flow by power law creep.
Journal ArticleDOI
Yielding of metal powder bonded by isolated contacts
TL;DR: In this article, a macroscopic constitutive law for the plastic yielding of a random aggregate of perfectly plastic spherical metal particles is developed, and the results are considered valid for aggregates with densities ranging from about 60% to around 90% of the theoretical fully dense level.
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