Constitutive data and friction measurements of powders using instrumented die
| Autor: | J. H. Tweed, L. Pater, J. Dawson, D.M.M. Guyoncourt, A. Gough |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Materials science
business.product_category System of measurement Metallurgy Metals and Alloys Compaction Condensed Matter Physics chemistry.chemical_compound Transducer chemistry Mechanics of Materials Tungsten carbide visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Die (manufacturing) Ceramic Composite material business Displacement (fluid) Radial stress |
| Zdroj: | Powder Metallurgy. 44:25-33 |
| ISSN: | 1743-2901 0032-5899 |
| DOI: | 10.1179/003258901666130 |
| Popis: | An instrumented die has been developed to measure friction and constitutive data on powders during compaction. Such data is useful for quality assurance and as input data for computer models of die compaction. The measurement system consists of a die with radial stress sensors, punch force measurement, and a displacement transducer to measure punch displacement. The outputs of these sensors enable simultaneous measurement of density, die wall friction coefficient, and the triaxial stresses acting on the powder during the course of compaction.The die system has been tested at three industrial sites on automated and manual presses measuring ferrous, ceramic, and tungsten carbide powders at applied stresses of up to 650 MPa and speeds of up to 26 mm s-1. Sensor outputs were sufficiently noise free to permit the recording of useful data down to stresses less than 1 MPa. Typically the run to run reproducibility of friction coefficients was better than ± 0·005, depending on the type of powder and the ap... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|