2026-09-20T12:02:21Zhttps://iris.unitn.it/oai/request

oai:iris.unitn.it:11572/3682812026-04-03T00:49:23Zcom_11572_237821com_11572_101871col_11572_237822ou_ou00016

Deformation mechanisms in bulk nanostructured aluminum obtained after cryomilling and consolidation by spark plasma sintering Lonardelli, Ivan Lonardelli, Ivan Molinari, Alberto Settore ING-IND/21 - Metallurgia Bimodal bulk nanocristalline (nc)/ultrafine (UF) aluminum was produced after cryomilling and spark plasma sintering consolidation process. The samples obtainedwere plastically deformed in uniaxial compression. We show that there is a significant fraction of plastic strain (11%) that can be recovered after unloading. High-energy synchrotron X-ray diffraction experiments revealed that, there is a correlation between plastic strain recovery and microstructural evolution detected during in-situ loading-unloading experiments. Using a deconvolution approach, the nanostructured volume fraction (grain size below 100 nm) and the UF counterpart (grain size above 100-150 nm)were separated in terms of lattice strain, microstrain, crystallite size and crystallographic texture. During loading-unloading cycles we observe a lattice strain splitting between nc and UF volume fractions, a complete recovery of the peak broadening and a recovery of texture. These intriguing phenomena were explained to be strictly correlated with the lattice strain splitting behavior which act as the driving force for dislocation recombination. 2010 info:eu-repo/semantics/doctoralThesis https://hdl.handle.net/11572/368281 http://dx.doi.org/10.15168/11572_368281 10.15168/11572_368281 eng firstpage:1 lastpage:116 numberofpages:116 info:eu-repo/semantics/openAccess Università degli studi di Trento place:TRENTO license:Tutti i diritti riservati (All rights reserved)