Mechanical behaviour and temperature measurement during dynamic deformation on split Hopkinson bar of 304L stainless steel and 5754 aluminium alloy
| Autor: | C. Jovic, L. Lazzarotto, Gérard Gary, Philippe Hervé, Danièle Wagner |
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| Přispěvatelé: | CEntre Technique des Industries Mécaniques - Cetim (FRANCE), Laboratoire d'énergétique et d'économie d'énergie (LEEE), Université Paris Nanterre (UPN), Laboratoire de mécanique des solides (LMS), École polytechnique (X)-MINES ParisTech - École nationale supérieure des mines de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), École polytechnique (X)-Mines Paris - PSL (École nationale supérieure des mines de Paris) |
| Rok vydání: | 2006 |
| Předmět: |
Thermal equilibrium
Materials science Metallurgy General Physics and Astronomy 02 engineering and technology Split-Hopkinson pressure bar Strain rate 021001 nanoscience & nanotechnology Temperature measurement Dynamic load testing 020303 mechanical engineering & transports 0203 mechanical engineering visual_art [PHYS.MECA.SOLID]Physics [physics]/Mechanics [physics]/Solid mechanics [physics.class-ph] Aluminium alloy visual_art.visual_art_medium Coupling (piping) Deformation (engineering) 0210 nano-technology |
| Zdroj: | Journal de Physique IV Proceedings Journal de Physique IV Proceedings, EDP Sciences, 2006, EURODYMAT 2006-8th International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading, 134, pp.1279-1285. ⟨10.1051/jp4:2006134194⟩ Journal de Physique IV Proceedings, 2006, EURODYMAT 2006-8th International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading, 134, pp.1279-1285. ⟨10.1051/jp4:2006134194⟩ |
| ISSN: | 1764-7177 1155-4339 |
| DOI: | 10.1051/jp4:2006134194 |
| Popis: | International audience; The forming process of massive products at ambient temperature and at high speed of loading has not led to many scientific investigations up to now. Its understanding involves mechanical and thermal aspects that are strongly linked together (thermo-mechanical coupling). The adiabatic process generated at high strain rates, due to the short duration of the test that does not allow for thermal equilibrium, can induce thermal softening in the billet and modifications of the metallurgical microstructures. The tests are done with 304L stainless steel and 5754 aluminium alloy. A split Hopkinson bar is used for strain rates up to 2000 $^{{\rm s}-1}$. During the test, the temperature at specimen surface was measured with an infrared multi-detector (with a resolution area $43\,\mu$m $\times 43\,\mu$m and an frequency acquisition equal to 1 MHz). The measurement system allows for a temperature measurement along a line of the specimen surface. The focusing system is designed to eliminate the geometric and chromatic aberrations induced by the lenses and it allows for measurements at high strain rates with short specimens. With this system, it is shown that the temperature field is homogeneous along the sample during the complete duration of loading. Consequently, the Taylor-Quinney coefficient can be deduced from temperature measurements. |
| Databáze: | OpenAIRE |
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