Formation of Inhomogeneous Texture and Structure in Metal Materials under Equal-Channel Angular Pressing

Abstract:

Texture analysis and the new X-ray method of Generalized Pole Figures (GPF) were used by the study of texture and substructure inhomogeneity of Ti rods, submitted to Equal-Channel Angular Pressing (ECAP) at 400oC. Local texture features testify about gradual rotation of loading axes by ~15o when crossing the rod’s section. As a result of second pass (route C), the specific ECAP texture weakens and the textureless component intensifies. Observed substructure changes are connected with development of dynamic recovery and dynamic recrystallization.

• Periodical: Materials Science Forum (Volumes 495-497)
• Pages: 827-832
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.495-497.827
• Online since: September 2005
• Authors: Margarita Isaenkova, Yuriy Perlovich, Vladimir Fesenko, M. Grekhov, Igor V. Alexandrov, Irene J. Beyerlein
• Keywords: Dislocation Density, Equal-Channel Angular Pressing (ECAP), Inhomogeneity, Residual Elastic Microstrain, Substructure, Texture, α-Ti

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20 40 60 80 100.

[10] [20] [30] [40] [50] [0] 0. 1 0. 2 0. 3.

[10] [20] [30] 0. 1.

[10] [20] [30] [1] 10 100 a b c 0. 01 ν(εc), % ν(ρc).

20 40 60 80 100 Coherent domain size Dc, nm.

[10] [20] [30] [40] [50] [0] 0. 1 0. 2 0. 3 Lattice distortion εc.

[10] [20] [30] 0. 1 Dislocation density ρc, 1014 m-2.

[10] [20] [30] [1] 10 100 d e f 0. 01 ν(εc), % ν(ρc), % ν(Dc), % ν(Dc), % Fig. 5. Substructure inhomogeneity of Ti rods; section III, middle: a, b, c - rod 1; d, e, f - rod 2; a, d - ν(Dc); b, e - ν(εc); c, f - ν(ρc).