TY - JOUR
T1 - Solute segregation assisted nanocrystallization of a cold-rolled Mg–Ag alloy during annealing
AU - Xiao, L.R.
AU - Chen, X.F.
AU - Cao, Y.
AU - Zhou, H.
AU - Ma, X.L.
AU - Yin, D.D.
AU - Ye, B.
AU - Han, X.D.
AU - Zhu, Y.T.
PY - 2020/3/1
Y1 - 2020/3/1
N2 - Refining grains to nanoscale has been a challenge, especially for materials with low-melting points and poor ductility, such as Mg alloys. Here we report a novel mechanism of nanocrystallization assisted by solute segregation, by which a nanocrystalline Mg-Ag alloy was produced by moderate cold rolling (∼55% strain) followed by low-temperature annealing. Specifically, during cold rolling non-basal〈c + a〉dislocations were activated to form dislocation cells walls, which were pinned by Ag segregation, and transformed into boundaries of nanocrystalline grains during annealing.
AB - Refining grains to nanoscale has been a challenge, especially for materials with low-melting points and poor ductility, such as Mg alloys. Here we report a novel mechanism of nanocrystallization assisted by solute segregation, by which a nanocrystalline Mg-Ag alloy was produced by moderate cold rolling (∼55% strain) followed by low-temperature annealing. Specifically, during cold rolling non-basal〈c + a〉dislocations were activated to form dislocation cells walls, which were pinned by Ag segregation, and transformed into boundaries of nanocrystalline grains during annealing.
KW - Interfacial segregation
KW - Mg alloy
KW - Nanocrystalline materials
KW - Transmission electron microscopy
KW - Interfacial segregation
KW - Mg alloy
KW - Nanocrystalline materials
KW - Transmission electron microscopy
KW - Interfacial segregation
KW - Mg alloy
KW - Nanocrystalline materials
KW - Transmission electron microscopy
UR - http://www.scopus.com/inward/record.url?scp=85073617042&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85073617042&origin=recordpage
U2 - 10.1016/j.scriptamat.2019.10.012
DO - 10.1016/j.scriptamat.2019.10.012
M3 - RGC 21 - Publication in refereed journal
SN - 1359-6462
VL - 177
SP - 69
EP - 73
JO - Scripta Materialia
JF - Scripta Materialia
ER -