Microstructural development and tensile strength of an ECAP: deformed Al-4 wt. (%) Cu alloy
AUTOR(ES)
Prados, Érika Ferananda, Sordi, Vitor Luiz, Ferrante, Maurizio
FONTE
Materials Research
DATA DE PUBLICAÇÃO
2008-06
RESUMO
The tensile strength of metals and alloys can be considerably increased by severe plastic deformation, a consequence of the extreme grain refinement thus achieved. In the present work the deformation was performed by Equal Channel Angular Pressing and the material was an Al-4% Cu alloy. Characterization included tensile tests, and microstructural observation by optical and transmission electron microscopy. After four passes, the yield strength showed an increase of 310% over the undeformed alloy, a figure reduced to 160% by a 250 °C / 1 hour post - deformation anneal. Additionally, the alloy displayed a very low work hardening capacity, especially after the annealing heat treatment. After four deformation passes the grain size of the annealed specimens was estimated to be close to 500 nm. The tensile behaviour and the absence of work hardening were discussed in terms of the fine microstructure.
Documentos Relacionados
- Microstructural Characterization and Evaluation of the Thermomechanical Behavior of an Al 7075-T651 Alloy Deformed by Two Passes of ECAP
- Microstructural evolution of AA7050 al alloy processed by ECAP
- Thermal properties of WC-10 wt. (%) Co alloys
- Predicting Secondary-Dendrite Arm Spacing of the Al-4.5wt%Cu Alloy During Unidirectional Solidification
- Influence of grain size and additions of Al and Mn on the magnetic properties of non-oriented electrical steels with 3 wt. (%) Si