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>