Details

Autor(en) / Beteiligte

• Castellanos, J
• Gutierrez, V
• Rieiro, I
• Ruano, O A
• Carsf, M

Titel

Influence of the initial microstructure on the constitutive equation for the creep of a steel

Ist Teil von

• Revista de metalurgia (Madrid), 2009-01, Vol.45 (1), p.70-75

Erscheinungsjahr

2009

Quelle

EZB Free E-Journals

Beschreibungen/Notizen

• The as-started material is a fine grained microalloyed steel, 15-20 mum. A coarse grain material, 90-100 mum, is obtained by means of a heat treatment. Torsion tests are conducted in samples with these two grain sizes at various temperatures and strain rates and enough amount of data is obtained to carry out a reliable statistical analysis. The coarser grain material has a higher peak stress than the finer grain material. The constitutive equations are determined for each case and the meaning of the obtained values are discussed. Finally, these equations are applied to the modelling of the forming process of the fine grained and coarse grained materials.