Effect of temperature on microstructure and texture evolution during uniaxial tension of commercially pure titanium

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2017-08, Vol.703, p.399-412
• Main Authors: Bishoyi, B.D., Sabat, R.K., Sahu, J., Sahoo, S.K.
• Format: Article
• Language: English
• Subjects: CP-titanium; Deformation; Deformation twinning; EBSD; Elongation; Evolution; Grain refinement; Microstructure; Misalignment; Temperature effects; Tension test; Texture; Titanium
• ISSN: 0921-5093; 1873-4936
• DOI: 10.1016/j.msea.2017.07.081

Commercially pure (CP) titanium samples were subjected to uniaxial tension of 5, 15, 25, 35 and 45 elongation (%) at room temperature (298K), 673K and 873K respectively. The texture and microstructure evolution as a function of temperature and elongation (%) were evaluated in the present study. The following observations were made: (i) twins of both {10 1¯ 2} type tensile twins and {11 2¯ 2} type compressive twins were significant during deformation at 298K while at high temperatures, these twins were observed till 15 elongation (%) only; (ii) both the twins were mostly activated in the grains/orientations of high Schmid factor values, although these twins were also activated in some grains with low Schmid factor values; (iii) both grain refinement and misorientation developments as a function of elongation (%) was higher for the samples deformed at 298K compared to those at 673K and 873K; (iv) The initial texture concentrated along (11 2¯ 5) was observed to be strengthened with progressive deformation irrespective of the temperature of deformation. However, the texture intensity was higher during deformation at high temperatures.