The plastic deformation behavior of bulk nanocrystalline-ultrafine Al was investigated under in situ compressive loading using high-energy synchrotron X-ray diffraction. After one loading-unloading cycle, to 2% strain, we find reversible peak broadening within the nanocrystalline grain volume and tensile residual stress (80 MPa) within the ultrafine grain volume. Upon unloading, we detect recovery of 12% of the plastic strain, and this recovery increases up to 28% at even higher applied deformations to 4%. © 2008 Acta Materialia Inc.
Deformation behavior in bulk nanocrystalline-ultrafine aluminum: in situ evidence of plastic strain recovery / Lonardelli, I., Almer, J., Ischia, G., Menapace, C., Molinari, A.. - In: SCRIPTA MATERIALIA. - ISSN 1359-6462. - 60:7(2009), pp. 520-523. [10.1016/j.scriptamat.2008.11.045]
Deformation behavior in bulk nanocrystalline-ultrafine aluminum: in situ evidence of plastic strain recovery
Lonardelli, Ivan;Ischia, Gloria;Menapace, Cinzia;Molinari, Alberto
2009-01-01
Abstract
The plastic deformation behavior of bulk nanocrystalline-ultrafine Al was investigated under in situ compressive loading using high-energy synchrotron X-ray diffraction. After one loading-unloading cycle, to 2% strain, we find reversible peak broadening within the nanocrystalline grain volume and tensile residual stress (80 MPa) within the ultrafine grain volume. Upon unloading, we detect recovery of 12% of the plastic strain, and this recovery increases up to 28% at even higher applied deformations to 4%. © 2008 Acta Materialia Inc.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione
