TY - DATA T1 - Back stress in strain hardening of carbon nanotube/aluminum composites PY - 2017/11/28 AU - Run Xu AU - Genlian Fan AU - Zhanqiu Tan AU - Gang Ji AU - Cai Chen AU - Benoît Beausir AU - Ding-Bang Xiong AU - Qiang Guo AU - Cuiping Guo AU - Zhiqiang Li AU - Di Zhang UR - https://tandf.figshare.com/articles/journal_contribution/Back_stress_in_strain_hardening_of_carbon_nanotube_aluminum_composites/5639452 DO - 10.6084/m9.figshare.5639452.v1 L4 - https://ndownloader.figshare.com/files/9824440 KW - Carbon nanotubes KW - metal matrix composite KW - strain hardening KW - back stress KW - geometrically-necessary dislocations N2 - 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. IMPACT STATEMENT 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. ER -