Effect of rate of deformation on electromagnetic radiation during quasi-static compression of sintered aluminium preforms
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Sujeet Kumar Mishra
Abstract
This paper presents some experimental results on the intermittent electromagnetic radiation (EMR) characteristics of sintered aluminium powder preforms under quasi-static compression. The stress level within the gross elastic limit and yielding of the partially compact preforms at which first EMR emission is observed, bears a distinct parabolic relation with the rate of compressive deformation. These observations can be developed into a new technique to detect the compactness of sintered metal powder preforms for industrial components. Further, each successive intermittent EMR emission at all rates of deformation requires increasing incremental strain energy during progressive plastic deformation. The electromagnetic energy release rate decreases sharply as the rate of deformation is increased and then attains a more or less constant value at higher rates of deformation. These results appear significant in understanding the mechanism of plastic deformation in metal powder preforms at the microscopic level, not yet reported in the literature.
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© 2014, Carl Hanser Verlag, München
Articles in the same Issue
- Contents
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- Twinning dislocation and twin propagation process in a nickel-base single crystal TMS-82 superalloy
- Relationship between austenite stability and martensite formation in modified 9Cr-1Mo steel
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- The effect of annealing temperature on the corrosion behavior of silver alloyed 2205 duplex stainless steel
- Effect of rate of deformation on electromagnetic radiation during quasi-static compression of sintered aluminium preforms
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- Microwave synthesis of ultrafine and nanosized powders of tungsten oxide and carbide
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Articles in the same Issue
- Contents
- Contents
- Original Contributions
- Twinning dislocation and twin propagation process in a nickel-base single crystal TMS-82 superalloy
- Relationship between austenite stability and martensite formation in modified 9Cr-1Mo steel
- The influence of brazing temperature and surface roughness on the wettability of reactive brazing alloys
- Thermodynamic modelling of the “Cu2O”–SiO2, “Cu2O”– CaO, and “Cu2O”– CaO – SiO2 systems in equilibrium with metallic copper
- The effect of annealing temperature on the corrosion behavior of silver alloyed 2205 duplex stainless steel
- Effect of rate of deformation on electromagnetic radiation during quasi-static compression of sintered aluminium preforms
- Temperature effect on decorative gold coatings obtained from electrolyte based on mercaptotriazole – comparison with cyanide
- High-strength and thermally stable Al – CeO2 composite produced by means of mechanical alloying
- Enhancing photocatalytic activity of ZnO nanostructures by doping with Ce+4 ions prepared in water using ultrasonic irradiation
- Modified hyperbranched epoxy/clay nanocomposites: A study on thermal, antimicrobial and biodegradation properties
- Short Communications
- Synthesis of carnallite crystal from KCl – MgCl2 solutions and its characterization
- Microwave synthesis of ultrafine and nanosized powders of tungsten oxide and carbide
- DGM News
- DGM News