Showing papers by "Eduard Arzt published in 1983"
TL;DR: In this paper, the construction of mechanism maps for hot-isostatic pressing is described, and a number of materials of commercial and scientific interest: tool steel, a superalloy, Al2O3, and ice.
Abstract: The construction of mechanism maps for hot-isostatic pressing is described. Maps are constructed for a number of materials of commercial and scientific interest: a tool steel, a superalloy, Al2O3, and ice. They allow the processes involved in hot-isostatic pressing to be examined, and suggest ways of picking optimum combinations of pressure, temperature, and time to give maximum density.
316 citations
TL;DR: In this article, the authors derived expressions for the rate of diffusional flow when the density of sinks and sources becomes small and when their mobility is limited by impurities, solutes, or precipitates.
294 citations
TL;DR: In this article, a model for describing the densification behavior of an irregular packing of spherical particles is developed based on a previous experimental study of particle deformation during powder compaction.
Abstract: Based on a previous experimental study of particle deformation during powder compaction, a model is developed for describing the densification behaviour of an irregular packing of spherical particles. Using the radial density function of a ‘random dense packing’, the increase in both the average size and the number of contact faces are calculated. A simple criterion for local yielding allows the compaction pressure to be determined for relative densities up to 90%. In the final stage of compaction, particle deformation, now constrained by neighbouring contacts, is modelled by extrusion into the remaining pore space. A compaction equation encompassing both stages is presented; its application to non-spherical powders elucidates the role of particle shape during powder densification. PM/0150
184 citations
TL;DR: In this paper, the hot-isostatic pressing of lead, tin and PMMA has been studied, using a rig which enables continuous measurement of density during a test, and the dominant mechanisms of densification are plasticity and creep.
117 citations
DOI•
01 Feb 1983TL;DR: In this paper, the construction of mechanism maps for hot-isostatic pressing is described, and a number of materials of commercial and scientific interest: tool steel, a superalloy, Al2O3, and ice.
Abstract: The construction of mechanism maps for hot-isostatic pressing is described. Maps are constructed for a number of materials of commercial and scientific interest: a tool steel, a superalloy, Al2O3, and ice. They allow the processes involved in hot-isostatic pressing to be examined, and suggest ways of picking optimum combinations of pressure, temperature, and time to give maximum density.
70 citations