Evolution of microstructure, macrotexture and mechanical properties of commercially pure Ti during ECAP-conform processing and drawing

Gunderov, D. V. and Polyakov, A. V. and Semenova, I. P. and Raab, G. I. and Churakova, A. A. and Gimaltdinova, E. I. and Sabirov, Ilchat and Segurado Escudero, Javier and Sitdikov, V. D. and Alexandrov, I. V. and Enikeev, N. A. and Valiev, R. Z. (2013). Evolution of microstructure, macrotexture and mechanical properties of commercially pure Ti during ECAP-conform processing and drawing. "Materials Science and Engineering: A. Structural Materials: Properties, Microstructure and Processing", v. 562 ; pp. 128-136. ISSN 0921-5093. https://doi.org/10.1016/j.msea.2012.11.007.

Description

Title: Evolution of microstructure, macrotexture and mechanical properties of commercially pure Ti during ECAP-conform processing and drawing
Author/s:
  • Gunderov, D. V.
  • Polyakov, A. V.
  • Semenova, I. P.
  • Raab, G. I.
  • Churakova, A. A.
  • Gimaltdinova, E. I.
  • Sabirov, Ilchat
  • Segurado Escudero, Javier
  • Sitdikov, V. D.
  • Alexandrov, I. V.
  • Enikeev, N. A.
  • Valiev, R. Z.
Item Type: Article
Título de Revista/Publicación: Materials Science and Engineering: A. Structural Materials: Properties, Microstructure and Processing
Date: 1 February 2013
ISSN: 0921-5093
Volume: 562
Subjects:
Freetext Keywords: Mechanical properties; Texture; Titanium; Severe plastic deformation; Nanostructured materials; Grain refinement.
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Ciencia de los Materiales
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Long-length ultrafine-grained (UFG) Ti rods are produced by equal-channel angular pressing via the conform scheme (ECAP-C) at 200 °C, which is followed by drawing at 200 °C. The evolution of microstructure, macrotexture, and mechanical properties (yield strength, ultimate tensile strength, failure stress, uniform elongation, elongation to failure) of pure Ti during this thermo-mechanical processing is studied. Special attention is also paid to the effect of microstructure on the mechanical behavior of the material after macrolocalization of plastic flow. The number of ECAP-C passes varies in the range of 1–10. The microstructure is more refined with increasing number of ECAP-C passes. Formation of homogeneous microstructure with a grain/subgrain size of 200 nm and its saturation after 6 ECAP-C passes are observed. Strength properties increase with increasing number of ECAP passes and saturate after 6 ECAP-C passes to a yield strength of 973 MPa, an ultimate tensile strength of 1035 MPa, and a true failure stress of 1400 MPa (from 625, 750, and 1150 MPa in the as-received condition). The true strain at failure failure decreases after ECAP-C processing. The reduction of area and true strain to failure values do not decrease after ECAP-C processing. The sample after 6 ECAP-C passes is subjected to drawing at 200¯C resulting in reduction of a grain/subgrain size to 150 nm, formation of (10 <img height="11" border="0" style="vertical-align:bottom" width="10" alt="View the MathML source" title="View the MathML source" src="http://origin-ars.els cdn.com/content/image/1-s2.0-S0921509312015559-si0007.gif">1¯0) fiber texture with respect to the rod axis, and further increase of the yield strength up to 1190 MPa, the ultimate tensile strength up to 1230 MPa and the true failure stress up to 1600 MPa. It is demonstrated that UFG CP Ti has low resistance to macrolocalization of plastic deformation and high resistance to crack formation after necking.

Funding Projects

TypeCodeAcronymLeaderTitle
FP7295322VINATUnspecifiedTHEORETICAL ANALYSIS, DESIGN AND VIRTUAL TESTING OF BIOCOMPATIBILITY AND MECHANICAL PROPERTIES OF TITANIUM-BASED NANOMATERIALS

More information

Item ID: 29057
DC Identifier: http://oa.upm.es/29057/
OAI Identifier: oai:oa.upm.es:29057
DOI: 10.1016/j.msea.2012.11.007
Deposited by: Memoria Investigacion
Deposited on: 03 Jul 2014 15:11
Last Modified: 04 Nov 2014 11:26
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