INVESTIGADORES
DIAZ Felipe Victor
artículos
Título:
Analysis of Residual Deformations and Stresses in a Rolled Sheet of AA 6082-T6 Aluminium Alloy Using a Micro-indent Method
Autor/es:
F.V. DÍAZ; F.N. ROSSO; A.C. WALKER; C.A. MAMMANA; A.P.M. GUIDOBONO
Revista:
Research Journal of Applied Sciences, Engineering and Technology
Editorial:
Maxwell Science Publication
Referencias:
Año: 2014
ISSN:
2040-7459
Resumen:
The
residual deformation and stress states, corresponding to a rolled product of AA
6082-T6 aluminium alloy used in naval structures, were comprehensively analyzed
from data obtained using an optimized micro-indent method. A great advantage of
using this method, which needs a measuring machine, is to avoid specific
equipments and qualified personnel. Furthermore, the absolute measurement error
of this technique is very small (± 0.9 MPa). The results obtained through the
analysis of Mohr's circles reveal compressive normal components prevailing in
the residual deformation and stress states. A very important aspect is that the
direction of the more compressive component is very close to the rolling
direction. This may indicate the importance of the rolling process, which is
previous to the thermal hardening process T6, in the final states of residual
deformation and stress. Finally, the residual stress state of the evaluated material,
which is quasi-isotropic, was compared with the failure stress by using the von
Mises yield criterion for ductile materials.