Investigation of the effect of dissimilar channel angular pressing method to the mechanical and microstuctural properties of 6061 aluminum alloy sheets

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Tezin Türü: Yüksek Lisans

Tezin Yürütüldüğü Kurum: Orta Doğu Teknik Üniversitesi, Mühendislik Fakültesi, Metalurji ve Malzeme Mühendisliği Bölümü, Türkiye

Tezin Onay Tarihi: 2010

Öğrenci: ALP AYKUT KİBAR

Danışman: BİLGEHAN ÖGEL

Özet:

Dissimilar Channel Angular Pressing (DCAP) method is an effective Severe Plastic Deformation (SPD) technique to improve the mechanical properties of sheets or strips by producing ultrafine grains. The aim of this study is to investigate the evolution of the microstructure and the improvement in mechanical properties of 6061 Al-alloy strips deformed by DCAP up to 5 passes. Mechanical properties such as hardness and strength have been observed to increase up to a certain strain level depending on the microstructural evolution. These microstructural changes were investigated by the characterization studies of XRD, SEM and TEM analysis of the DCAPed samples indicating the subgrain formation, changes in the dislocation density and dislocation behaviors.