Localized Defects in Cold Die-Compacted Metal Powders
نویسندگان
چکیده
In powder metallurgy (PM), the compaction step is fundamental to determining final properties of sintered components. The deformation and defectiveness introduced in material during uniaxial die can be correlated activation enhancement dislocation pipe diffusion, a lattice diffusion mechanism sintering process. Its coefficient depends on density. particles are mostly deformed along direction (longitudinal direction) rather than plane; consequently, contact areas perpendicular present higher density dislocations defects. This high intensifies shrinkage compaction. To demonstrate influence cold material’s stress state their contacts were modeled using spheres made pure copper. These compacted at different pressures better analyze system’s response grade consequent behavior sintering. zones sphere, micro-hardness was measured concentration model for indentation size effect (ISE). After compaction, more longitudinal transversal direction. results obtained hardness show differences between undeformed and, case area
منابع مشابه
Hardness and Densification Behaviour of Copper and Bronze Powders Compacted with Uniaxial Die and Cold Isostatic Pressing Processes
A. Eksi, Faculty of Engineering and Architecture, Çukurova University, Adana, Turkey, M. K. Kulekci, Faculty of Technical Education, Mersin University, Tarsus, Turkey In this study hardness and densification behaviour of copper and bronze powders under wet bag cold isostatic and uniaxial die pressing processes are examined. In uniaxial pressing the specimens were compacted up to a pressure of 8...
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ژورنال
عنوان ژورنال: Journal of manufacturing and materials processing
سال: 2022
ISSN: ['2504-4494']
DOI: https://doi.org/10.3390/jmmp6060155