Untitled in english

Author(s)

Geraldo Liserre Junior

• Document type: Master's Dissertation
• Press: São Paulo.
• Institution: Universidade de São Paulo (USP). Escola Politécnica (EP/BC)
• Defense date: 1999-05-28

Examining board members

Marcelo Gonçalves; Waldemar Alfredo Monteiro; Ronald Lesley Plaut

• Advisor: Marcelo Goncalves

Abstract

The thermochemical processing of metallic alloys can be defined as a combination of termal and deformational processes, applied simultaneously or not, producing different microstructures according to the chosen processing combination. Knowing that be microstructure presente in the metal can alter the mechanical properties, the right choice in terms of thermomechanical processing can lead us to achieve desired properties through the microstructural controlo f the alloys. The best combination of those processes, to achieve the desired microstructure and mechanical properties, is often found empirically, demanding considerable amounts of time and Money. The solve this problem, empirical equations have seen developed relating the major processing variables and the consequente microstructural evolution. The presente work aims out contributing to the understanding and quantification of how thermomechanical processing can influence the microstructural evolution in a comercial purity aluminum alloy. For this purpose, experiments were made involving hot rolling and annealing heat treatments after the deformation and, the variables studied were: strain; deformation temperature, strain rate and annealing time. Such variables were assessed in terms of their effects on the microstructural development of the alloy studied. (AU)