Abstracts Book - IMRC 2018

• SE1-O019
REPETITIVE CORRUGATION AND STRAIGHTENING ON A 6061
ALUMINUM ALLOY. EFFECT OF HEAT TREATMENT
S. Elizalde 1 , J M. Cabrera 2 , J A. Picas 2 , M. Ezequiel 1 , G. Gonzalez 1
1 Instituto de Investigaciones en Materiales, Materiales Metalicos y Cerámicos, Mexico.
2 Universitat Politècnica de Catalunya, Departamento de Ciencia de los Materiales e Ingeniería
Metalúrgica, Spain.
An aluminum alloy 6061 (Al–Mg–Si) in sheet form of 1 mm in thickness was
processed both in T0 and T6 state by severe plastic deformation using the
repetitive corrugation and straightening (RCS) technique. The microstructure
and mechanical properties were characterized at the end of the forming
process. For this purpose, the variation of the microstructure and microtexture
through each pass of the process was characterized by EBSD. Tensile tests at
different strain rates and temperatures were carried out in order to evaluate
thermal stability of the mechanical properties and the apparition of the
superplasticity phenomena. The microstructural results displayed an ultrafine
grain structure was attained since the first RCS passes. As well the
thermomechanical tests showed that the so-called creep exponent was
relatively close to 0.5 being an indication that the deformation process is
controlled by the glide and climb of dislocations. Experimental deviations of this
value is explained in terms of precipitation hardening
Acknowledgment:
The authors would like to acknowledge the financial support of PAPIIT-UNAM
IN107917 in funding the project. IAF acknowledges PAPIIT-UNAM 101016 for the
funding. A. Tejeda, O. Novelo, G. Lara, C. Flores, C. Casas, J. Romero, F. García
and E. Hernández are also acknowledged for their technical support.
Keywords: Repetitive corrugation and straightening, Severe plastic deformation,
Aluminum 6061
Presenting authors email: sergioelizalde85@gmail.com