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| Titel: |
TEMPERATURE DISTRIBUTION FOR A STEADY AXISYMMETRIC EXTRUSION, WITH AN APPLICATION TO Ti-6A1-4V: PART 1 |
| Auteur: |
Sulijoadikusumo, A. U. Dillon, O. W. |
| Verschenen in: |
Journal of thermal stresses |
| Paginering: | Jaargang 2 (1979) nr. 1 pagina's 97-112 |
| Jaar: |
1979-01-01 |
| Inhoud: |
The temperature distribution during a steady axisymmetric extrusion process is calculated for a material with temperature-sensitive properties. Numerical results are obtained for Ti-6Al-4V. The extrusion process involves large deformations at high rates, and therefore large temperature changes are produced by the conversion of plastic work to heat. It is found that one must consider this adiabatic heating since temperature changes can easily be as large as 400°F. One cannot replace the temperature change with a uniform increase if one desires to calculate stresses. It is shown in Part 2 that two extrusion specimens having different initial temperatures end up such that the extruded products have almost the same final maximum temperature. This is because more plastic work is required to deform the billet that is initially cooler. It is also demonstrated that conduction can be neglected in the experiments but that surface cooling during the transfer of the specimen from the heating furnace to the extrusion press must be considered. These temperature conditions are particularly important in making realistic stress calculations, as is done in Part 3. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
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