To access the full text documents, please follow this link: http://hdl.handle.net/2117/76641

Microstructure and mechanical properties of a commercially pure Ti processed by warm equal channel angular pressing
Rodríguez Calvillo, Pablo; Cabrera Marrero, José M.
Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica; Universitat Politècnica de Catalunya. PROCOMAME - Processos de Conformació de Materials Metàl·lics
A commercially pure (CP) Titanium alloy classified as Grade 1, was processed by Equal Channel Angular Pressing (ECAP) up to 4 passes in the temperature range of 450-150 degrees C.; The resulting microstructures were observed by Electron Back-Scattered Diffraction, revealing a bimodal grain size distribution consisting of small recrystallized grains of submicrometer size, with an average value of 0.3 mu m, and elongated bands of 1.4 mu m with different degree of substructure. Additionally the fraction of restored and deformed grains were evaluated as a function of processing temperature following an internal grain misorientation criterion, leading to an overall fraction of recrystallized grains between 40% and 20% in samples ECAPed at 450 and 150 degrees C, respectively.; The strengthening contributions of the grain size, equivalent oxygen content (O-eq) and Low Angle Grain Boundaries (LAGBs) to the yield stress were identified by the Hall Fetch and Taylor equations. The strengthening coefficient k of the Hall-Fetch relation was approximately 5 MPa mm(-1/2), with an increment of 0.44 MPa mm(-1/2) per 0.1 O-eq.-%, while the LAGB strengthening contribution was responsible approximately by half of the experimental yield stress values measured. (C) 2014 Elsevier B.V. All rights reserved.
Peer Reviewed
Àrees temàtiques de la UPC::Enginyeria dels materials
Titanium
Warm ECAP
CP Ti
EBSD
Mechanical properties
severe plastic-deformation
ultrafine-grained titanium
room-temperature
cp-ti
initial microstructure
fatigue-strength
purity titanium
multipass ecap
behavior
refinement
Titani -- Propietats mecàniques
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/submittedVersion
Article
         

Show full item record

Related documents

Other documents of the same author

Suarez, L.; Rodríguez Calvillo, Pablo; Cabrera Marrero, José M.; Martinez Romay, A; Majuelos Mallorquin, D
Fatemi Varzaneh, S. M; Zarei Hanzaki, A; Cabrera Marrero, José M.; Rodríguez Calvillo, Pablo
Suárez Fernández, Lucía; Rodríguez Calvillo, Pablo; Cabrera Marrero, José M.; Schneider, Jurgen; Jungnickel, W
Calvo Muñoz, Jessica; Rodríguez Calvillo, Pablo; Cabrera Marrero, José M.; Mateo García, Antonio Manuel
Mirzadeh, H.; Cabrera Marrero, José M.; Najafizadeh, A.; Rodríguez Calvillo, Pablo
 

Coordination

 

Supporters