Abstracts Book - IMRC 2018

• SE1-O003
EVOLUTION OF MICROSTRUCTURE AND MECHANICAL BEHAVIOR
IN A CP-ALUMINUM PROCESSED BY A NEW SPD METHOD
Jose Maria Cabrera 1 , Sandra Luz Rodriguez Reyna 1,2 , Jessica Calvo 1 , Alexander P. Zhilyaev 3,4
1 Universitat Politècnica de Catalunya, Departamento de Ciencia de los Materiales e Ingeniería
Metalúrgica, Spain. 2 Universidad Autónoma de San Luis Potosí, Mecánica y Eléctrica, Mexico.
3 Institute for Metals Superplasticity Problems, , Russia. 4 Nosov Magnitogorsk State Technical
University, Laboratory of Mechanics of Gradient Nanomaterials, Russia.
There is a great interest in developing aluminum alloys with ultrafine grains
(UFG), destined towards structural applications where exceptional mechanical
properties with low densities are required. It is feasible to fulfill it successfully
when processing light alloys (aluminum alloys), under severe plastic
deformation (SPD) techniques. This new method is based on generating a highaccumulated
deformation through an internal cavity inside a die where
deformation is limited to occur in the transversal section of the workpiece. A
commercially pure aluminum (1050) was chosen for this purpose. Before
applying SPD, samples were annealed at elevated temperatures, for 48 hrs.
obtaining an excellent response to the following forming step. During the
processing, a significant grain refinement of 160 μm to 0.7 μm occurred in the
Al alloy, when a total deformation of 24 was imposed. The yield stress (YS) and
ultimate tensile strength (UTS) increased simultaneously with the increase in the
number of SPD passes, with a slight loss of ductility. A typical laminar
microstructure for aluminum is noticed in the first passes while the
crystallographic texture become approximately random during the last passes.
Keywords: Alloy light, UFG, Mechanical properties
Presenting authors email: jose.maria.cabrera@upc.edu