TY - JOUR

T1 - Microstructure, Texture and Mechanical Properties of Titanium Grade 2 Processed by ECAP (Route C)

AU - Wroński, M.

AU - Wierzbanowski, K.

AU - Wojtas, D.

AU - Szyfner, E.

AU - Valiev, R. Z.

AU - Kawałko, J.

AU - Berent, K.

AU - Sztwiertnia, K.

PY - 2018/7

Y1 - 2018/7

N2 - In the present work the properties of titanium grade 2 after ECAP processing with original route and regimes (route C, channel angle (Formula presented.) = 120°, deformation temperature 300 °C, number of passes up to 8) were examined. Texture development and microstructure parameters after ECAP processing and after recrystallization were determined using electron back scatter diffraction and analysed. A significant increase of the mechanical strength accompanied by some increase of ductility was observed in the deformed samples. The kernel average misorientation and average grain orientation spread were strongly increased after deformation, which confirms the material refinement and fragmentation. The proportion of low angle boundaries increased after four ECAP passes, but after four consecutive passes high angle grain boundaries became predominant. No deformation twins were observed after four and eight ECAP passes. The material recrystallized after deformation retained a fine grain microstructure. The textures of deformed and recrystallized samples were determined. It was found that texture after 8 passes is more homogeneous that that after 4 passes, which partly explains higher ductility of this first sample.

AB - In the present work the properties of titanium grade 2 after ECAP processing with original route and regimes (route C, channel angle (Formula presented.) = 120°, deformation temperature 300 °C, number of passes up to 8) were examined. Texture development and microstructure parameters after ECAP processing and after recrystallization were determined using electron back scatter diffraction and analysed. A significant increase of the mechanical strength accompanied by some increase of ductility was observed in the deformed samples. The kernel average misorientation and average grain orientation spread were strongly increased after deformation, which confirms the material refinement and fragmentation. The proportion of low angle boundaries increased after four ECAP passes, but after four consecutive passes high angle grain boundaries became predominant. No deformation twins were observed after four and eight ECAP passes. The material recrystallized after deformation retained a fine grain microstructure. The textures of deformed and recrystallized samples were determined. It was found that texture after 8 passes is more homogeneous that that after 4 passes, which partly explains higher ductility of this first sample.

KW - Electron backscattering diffraction

KW - Metals

KW - Microstructure

KW - Severe plastic deformation

KW - Texture

KW - CHANNEL ANGULAR EXTRUSION

KW - ROOM-TEMPERATURE

KW - COPPER

KW - CRYSTALLOGRAPHIC TEXTURE

KW - MAGNESIUM

KW - EVOLUTION

KW - RECRYSTALLIZATION

KW - SEVERE PLASTIC-DEFORMATION

KW - INTERSTITIAL-FREE STEEL

KW - GRAIN

UR - http://www.scopus.com/inward/record.url?scp=85043706856&partnerID=8YFLogxK

UR - http://www.mendeley.com/research/microstructure-texture-mechanical-properties-titanium-grade-2-processed-ecap-route-c

U2 - 10.1007/s12540-018-0096-5

DO - 10.1007/s12540-018-0096-5

M3 - Article

VL - 24

SP - 802

EP - 814

JO - Metals and Materials International

JF - Metals and Materials International

SN - 1598-9623

IS - 4

ER -