Quantifying Crystallographic Texture Variation in a Titanium Billet

18th International Conference on Textures of Materials

材料科学;物理学

Davies, P.S.^1,2 ; Wynne, B.P.^1 ; Thomas, M.J.^3 ; Rainforth, W.M.^1

Department of Materials Science and Engineering, University of Sheffield, Mappin Street, Sheffield

S1 3JD, United Kingdom^1

Sheffield Forgemasters RD26 Ltd, 286 Brightside Lane, Sheffield

S9 2RW, United Kingdom^2

Timet UK Ltd., P.O.Box 704, Witton, West-Midlands, Birmingham

B6 7UR, United Kingdom^3

关键词: Crystallographic textures;    Deleterious effects;    Macrozones;    Neutron texture analysis;    Optical metallography;    Orientation spread;    Process route;    Size and shape;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/375/1/012019/pdf
DOI  :  10.1088/1757-899X/375/1/012019

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Ti-834 and other titanium alloy forgings can contain regions of similarly orientated primary alpha grains called macrozones that can have a deleterious effect on performance in-service. Understanding the origin of macrozones and how they change during processing is an important step in optimising process routes for these alloys. In this work a detailed characterisation of crystallographic texture variation was carried out on the cross-section of a 250 mm diameter Ti-834 billet using optical metallography, EBSD and neutron texture analysis. Results showed there was a variation in texture and macrozone size and shape through the billet with each macrozone composed of a single hcp component, with varying degrees of orientation spread. The texture of the majority of macrozones can be classed as either axial (c-axis parallel to the billet axis) or transverse (c-axis perpendicular to the billet axis). In the centre of the billet cross-section, the global texture was dominated by a fibre-like {10 1 0} texture due to a dominance of transverse macrozones. At the edge, there was a greater proportion of axial macrozones which gave rise to an additional {0002} component.