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Title: The development of crystallographic texture under plane strain compression in Ti-6Al-4V
Author: Smith, T. A.
Awarding Body: University of Wales Swansea
Current Institution: Swansea University
Date of Award: 2005
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The development of crystallographic texture during commercial rolling of Ti-6Al-4V has been studied using a plane strain compression (PSC) procedure. The study has been undertaken on material with (a) a weak x3.5 random starting texture and a globular α microstructure and on (b) a material with a basketweave transformed beta microstructure and a relatively heavy x18 random starting texture. The PSC program included strains up to 0.8 at strain rates of 10-3s-1 to 1s-1 and at temperatures from 800ºC to 1050ºC i.e. in both the α+β and β fields. The texture developments has been examined using the Electron Back-Scatter Diffraction (EBSD) technique. The effect of post deformation heat-treatment on existing textures, again in both the αβ and β fields, has also been investigated. It has been shown that PSC is capable of replicating results gained from rolling trails and as such is a viable laboratory based alternative. The results from the investigations show that for reductions of >60% in material thickness at temperatures high in the α+β field the final texture will have a transverse orientation regardless of starting microstructure or texture. Results also show that to change the existing texture of Ti-6Al-4V by heat treatment alone the treatment temperature must be above the beta transus. The EBSD and microstructural analysis revealed that most of the α texture development at temperatures at or below the beta transus is accomplished by deformation within the β phase.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available