Enhancing the Damping Behavior of Dilute Zn-0.3Al Alloy by Equal Channel Angular Pressing
Küçük Resim Yok
Tarih
2017
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer Boston
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The effect of grain size on the damping capacity of a dilute Zn-0.3Al alloy was investigated. It was found that there was a critical strain value (?1 × 10 ?4 ) below and above which damping of Zn-0.3Al showed dynamic and static/dynamic hysteresis behavior, respectively. In the dynamic hysteresis region, damping resulted from viscous sliding of phase/grain boundaries, and decreasing grain size increased the damping capacity. While the quenched sample with 100 to 250 µm grain size showed very limited damping capacity with a loss factor tan? of less than 0.007, decreasing grain size down to 2 µm by equal channel angular pressing (ECAP) increased tan? to 0.100 in this region. Dynamic recrystallization due to microplasticity at the sample surface was proposed as the damping mechanism for the first time in the region where the alloy showed the combined aspects of dynamic and static hysteresis damping. In this region, tan? increased with increasing strain amplitude, and ECAPed sample showed a tan? value of 0.256 at a strain amplitude of 2 × 10 ?3 , the highest recorded so far in the damping capacity-related studies on ZA alloys. © 2017, The Minerals, Metals & Materials Society and ASM International.
Açıklama
Anahtar Kelimeler
Aluminum alloys, Binary alloys, Damping, Dynamic recrystallization, Grain size and shape, Hysteresis, Pressing (forming), Zinc alloys, Critical strains, Damping behaviors, Damping capacity, Damping mechanisms, Dynamic hysteresis, Hysteresis behavior, Hysteresis damping, Strain amplitude, Equal channel angular pressing, Aluminum alloys, Binary alloys, Damping, Dynamic recrystallization, Grain size and shape, Hysteresis, Pressing (forming), Zinc alloys, Critical strains, Damping behaviors, Damping capacity, Damping mechanisms, Dynamic hysteresis, Hysteresis behavior, Hysteresis damping, Strain amplitude, Equal channel angular pressing
Kaynak
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
WoS Q Değeri
Q2
Scopus Q Değeri
Q1
Cilt
48
Sayı
6
