TY - JOUR
T1 - Effect of CNTs on Activation Volume and Mobile Dislocation Exhaustion Rate of CNTs/Al under Compression Loading
AU - Wang, Minjie
AU - Shen, Jianghua
AU - Chen, Biao
AU - Junko, Umeda
AU - Kondoh, Katsuyoshi
AU - Li, Yulong
N1 - Publisher Copyright:
© 2022, The Chinese Society for Metals (CSM) and Springer-Verlag GmbH Germany, part of Springer Nature.
PY - 2023/1
Y1 - 2023/1
N2 - In this study, stress relaxation compression tests were performed to investigate the strain rate sensitivity, activation volume and mobile dislocations in carbon nanotubes/aluminum (CNTs/Al) composites. The results reveal that, with the addition of CNTs, the strain rate sensitivity of CNTs/Al increased. Meanwhile, a smaller V* of CNTs/Al compared with pure Al was attributed mainly to the CNT-Al interfaces and partly to the increased forest dislocations cutting activities in grain interior, which was related to the tendency of short ranges order formation during plastic deformation. The incorporation of CNTs also improved the dislocation storage capability and reduced the dislocation velocity, leading to a lower mobile dislocation exhaustion rate.
AB - In this study, stress relaxation compression tests were performed to investigate the strain rate sensitivity, activation volume and mobile dislocations in carbon nanotubes/aluminum (CNTs/Al) composites. The results reveal that, with the addition of CNTs, the strain rate sensitivity of CNTs/Al increased. Meanwhile, a smaller V* of CNTs/Al compared with pure Al was attributed mainly to the CNT-Al interfaces and partly to the increased forest dislocations cutting activities in grain interior, which was related to the tendency of short ranges order formation during plastic deformation. The incorporation of CNTs also improved the dislocation storage capability and reduced the dislocation velocity, leading to a lower mobile dislocation exhaustion rate.
KW - Activation volume
KW - Carbon nanotubes
KW - Dislocations exhaustion
KW - Metal matrix composites
KW - Strain rate sensitivity
UR - http://www.scopus.com/inward/record.url?scp=85142182662&partnerID=8YFLogxK
U2 - 10.1007/s40195-022-01463-x
DO - 10.1007/s40195-022-01463-x
M3 - 快报
AN - SCOPUS:85142182662
SN - 1006-7191
VL - 36
SP - 127
EP - 132
JO - Acta Metallurgica Sinica (English Letters)
JF - Acta Metallurgica Sinica (English Letters)
IS - 1
ER -