Deformation behavior in bulk nanocrystalline-ultrafine aluminum :in situ evidence of plastic strain recovery.

Journal Article · Wed Apr 01 00:00:00 EDT 2009 · Scr. Materialia

DOI:https://doi.org/10.1016/j.scriptamat.2008.11.045· OSTI ID:1001616

Lonardelli, I; Almer, J; Ischia, G; Menapace, C; Molinari, A

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%.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: SC
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 1001616
• Report Number(s): ANL/XSD/JA-63224
• Journal Information: Scr. Materialia, Journal Name: Scr. Materialia Journal Issue: 7 ; Apr. 2009 Vol. 60; ISSN 1359-6462
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

43 PARTICLE ACCELERATORS
ALUMINIUM
DEFORMATION
MICROSTRUCTURE
PLASTICS
STRAINS
SYNCHROTRONS
UNLOADING
X-RAY DIFFRACTION