Effects of grain size on room temperature deformation behavior of Zn–22Al alloy under uniaxial and biaxial loading conditions
Küçük Resim Yok
Tarih
2016
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Effects of grain size on room temperature (RT) deformation behavior of superplastic Zn–22Al alloy under uniaxial and biaxial loading conditions were investigated. Two–step equal channel angular pressing (ECAP) and subsequent annealing processes were applied to the alloy in order to obtain microstructures with various grain sizes ranging from submicron to micron sizes. Grain size of 200 nm was achieved after ECAP of the alloy, and it was increased up to ~2.60 µm by annealing at 250 °C for different time periods. Changes in deformation behaviors of the alloy with various grain sizes were found to be in good agreement under the uniaxial tensile and biaxial Erichsen test conditions. Increasing grain size decreased both the maximum elongation under uniaxial deformation and limiting dome height (LDH) under biaxial deformation. The high elongation to failure and LDH values for the samples with submicron grain size were attributed to their high strain rate sensitivity. © 2016 Elsevier B.V.
Açıklama
Anahtar Kelimeler
Formability, Severe plastic deformation, Superplastic Zn–22Al alloy, Ultrafine grained structure, Formability, Grain size and shape, Pressing (forming), Strain rate, Zinc, Annealing process, Biaxial deformations, Deformation behavior, Severe plastic deformations, Temperature deformation, Ultrafine grained structure, Uniaxial and biaxial loadings, Uniaxial deformation, Equal channel angular pressing, Formability, Severe plastic deformation, Superplastic Zn–22Al alloy, Ultrafine grained structure, Formability, Grain size and shape, Pressing (forming), Strain rate, Zinc, Annealing process, Biaxial deformations, Deformation behavior, Severe plastic deformations, Temperature deformation, Ultrafine grained structure, Uniaxial and biaxial loadings, Uniaxial deformation, Equal channel angular pressing
Kaynak
Materials Science and Engineering A
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
672
