10.6084/m9.figshare.5639452.v1
Run Xu
Run
Xu
Genlian Fan
Genlian
Fan
Zhanqiu Tan
Zhanqiu
Tan
Gang Ji
Gang
Ji
Cai Chen
Cai
Chen
Benoît Beausir
Benoît
Beausir
Ding-Bang Xiong
Ding-Bang
Xiong
Qiang Guo
Qiang
Guo
Cuiping Guo
Cuiping
Guo
Zhiqiang Li
Zhiqiang
Li
Di Zhang
Di
Zhang
Back stress in strain hardening of carbon nanotube/aluminum composites
Taylor & Francis Group
2017
Carbon nanotubes
metal matrix composite
strain hardening
back stress
geometrically-necessary dislocations
2017-11-28 04:41:31
Journal contribution
https://tandf.figshare.com/articles/journal_contribution/Back_stress_in_strain_hardening_of_carbon_nanotube_aluminum_composites/5639452
<p>As demonstrated by the loading–unloading tests and the modeling of the grain size effect and the composite effect, mainly owing to the back stress induced by CNTs, carbon nanotube/aluminum (CNT/Al) composites exhibit higher strain hardening capability than the unreinforced ultrafine-grained Al matrix. The back stress induced by CNTs should arise from the interfacial image force and the long-range interaction between statically stored dislocations and geometrically necessary dislocations around the CNT/Al interface. Therefore, this CNT-induced interfacial back stress strengthening mechanism is supposed to provide a novel route to enhancing the strain hardening capability and ductility in CNT/Al composites.</p> <p><b>IMPACT STATEMENT</b></p> <p>The present work investigates the roles and origins of back stress in the strain hardening of the carbon nanotubes/aluminum composites for the first time.</p>