TY - JOUR
T1 - A new dynamic recrystallization mechanism in adiabatic shear band of an α/β dual phase titanium alloy
T2 - Composition redistribution
AU - Zhu, Xinjie
AU - Fan, Qunbo
AU - Wang, Duoduo
AU - Gong, Haichao
AU - Gao, Yu
AU - Qian, Feng
AU - Jin, Shenbao
AU - Sha, Gang
N1 - Publisher Copyright:
© 2021
PY - 2022/1/1
Y1 - 2022/1/1
N2 - In this paper, the composition distribution characteristics in adiabatic shear bands (ASBs) of an α/β dual phase Ti-5.5Mo-7.2Al-4.5Zr-2.6Sn-2.1Cr alloy and its influence on dynamic recrystallization (DRX) were investigated via atomic probe tomography. The results showed that in the ASB transition region, a clear grain boundary (GB) in α/β interface was observed. However, in the ASB central region, a “fuzzy GB” was formed in α/β interface, and abundant dislocations accumulated in the “fuzzy GB”. In addition, β stabilizing elements (Mo/Cr) became rather sparse in some local regions of β grains to form finer α grains, while in some regions of α grains, local β stabilizing elements were enriched to form finer β grains, thus separating the original grains into finer DRX grains. The unique composition distribution characteristics in α/β grains and α/β interface were defined as composition redistribution, which was the combined result of localized plastic deformation and adiabatic temperature rise.
AB - In this paper, the composition distribution characteristics in adiabatic shear bands (ASBs) of an α/β dual phase Ti-5.5Mo-7.2Al-4.5Zr-2.6Sn-2.1Cr alloy and its influence on dynamic recrystallization (DRX) were investigated via atomic probe tomography. The results showed that in the ASB transition region, a clear grain boundary (GB) in α/β interface was observed. However, in the ASB central region, a “fuzzy GB” was formed in α/β interface, and abundant dislocations accumulated in the “fuzzy GB”. In addition, β stabilizing elements (Mo/Cr) became rather sparse in some local regions of β grains to form finer α grains, while in some regions of α grains, local β stabilizing elements were enriched to form finer β grains, thus separating the original grains into finer DRX grains. The unique composition distribution characteristics in α/β grains and α/β interface were defined as composition redistribution, which was the combined result of localized plastic deformation and adiabatic temperature rise.
KW - Adiabatic shear bands
KW - Atom probe tomography
KW - Composition redistribution
KW - Dynamic recrystallization
UR - http://www.scopus.com/inward/record.url?scp=85114193302&partnerID=8YFLogxK
U2 - 10.1016/j.scriptamat.2021.114229
DO - 10.1016/j.scriptamat.2021.114229
M3 - Article
AN - SCOPUS:85114193302
SN - 1359-6462
VL - 206
JO - Scripta Materialia
JF - Scripta Materialia
M1 - 114229
ER -