Microstructural evolution and mechanical behavior of an Al-6061 alloy processed by repetitive corrugation and straightening
Por:
Elizalde S., Ezequiel M., Figueroa I.A., Cabrera J.M., Braham C., Gonzalez G.
Publicada:
1 ene 2020
Resumen:
The repetitive corrugation and straightening process is a severe plastic deformation technique that is particularly suited to process metallic sheets. With this technique, it is possible to develop nano/ultrafine-grained structured materials, and therefore, to improve some mechanical properties such as the yield strength, ultimate tensile strength, and fatigue lifetime. In this study, an Al-6061 alloy was subjected to the repetitive corrugation and straightening process. A new corrugation die design was proposed in order to promote a heterogeneous deformation into the metallic sheet. The evolution of the mechanical properties and microstructure obtained by electron backscatter diffiraction of the alloy showed a heterogeneous distribution in the grain size at the initial cycles of the repetitive corrugation and straightening process. Uniaxial tensile tests showed a significant increase in yield strength as the number of repetitive corrugation and straightening passes increased. The distribution of the plastic deformation was correlated with the hardness distribution on the surface. The hardness distribution map matched well with the heterogeneous distribution of the plastic deformation obtained by finite element simulation. A maximum average hardness (147 HV) and yield strength (385 MPa) was obtained for two repetitive corrugation and straightening cycles sample. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.
Filiaciones:
Elizalde S.:
Departamento de Ciencia e Ingeniería de Materiales, EEBE-Universitat Politècnica de Catalunya, Barcelona, 08019, Spain
Univ Politecn Cataluna, EEBE, Dept Ciencia & Ingn Mat, Barcelona 08019, Spain
Ezequiel M.:
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior S/N, Cd. Universitaria, A.P. 70-360, Coyoacán, Ciudad de México, 04360, Mexico
Univ Nacl Autonoma Mexico, Inst Invest Mat, Circuito Exterior S-N,Cd Univ,AP 70-360, Mexico City 04360, DF, Mexico
Figueroa I.A.:
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior S/N, Cd. Universitaria, A.P. 70-360, Coyoacán, Ciudad de México, 04360, Mexico
Univ Nacl Autonoma Mexico, Inst Invest Mat, Circuito Exterior S-N,Cd Univ,AP 70-360, Mexico City 04360, DF, Mexico
Cabrera J.M.:
Departamento de Ciencia e Ingeniería de Materiales, EEBE-Universitat Politècnica de Catalunya, Barcelona, 08019, Spain
Instituto de Investigaciones en Metalurgia y Materiales, Universidad Michoacana de San Nicolás de Hidalgo, Edificio U, Av. Francisco Múgica s/n, CU, Morelia, Michoacán 58000, Mexico
Univ Politecn Cataluna, EEBE, Dept Ciencia & Ingn Mat, Barcelona 08019, Spain
Univ Michoacana, Inst Invest Metalurgia & Mat, Ave Francisco Mugica S-N,Edificio U,CU, Morelia 58000, Michoacan, Mexico
Braham C.:
Laboratoire Procédés et Ingénierie Mécanique et Matériaux, CNRS UMR 8006, ENSAM-CNAM, 151, Bd de l’Hôpital, Paris, 75013, France
ENSAM CNAM, CNRS UMR 8006, Lab Procedes & Ingn Mecan & Mat, 151 Bd Hop, F-75013 Paris, France
Gonzalez G.:
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior S/N, Cd. Universitaria, A.P. 70-360, Coyoacán, Ciudad de México, 04360, Mexico
Univ Nacl Autonoma Mexico, Inst Invest Mat, Circuito Exterior S-N,Cd Univ,AP 70-360, Mexico City 04360, DF, Mexico
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