Sheet Tensile Properties of Titanium Alloys as Affected by Texture

Abstract

A study was carried out on the effect of specimeh orientation on the sheet tensile properties of several titanium alloys. For these alloys, chemical analysis, microstructure, X-ray pole figures, and sheet tensile properties were determined at lO-depree increments from the rolling to the transverse direction. In addition to the conventional yield strength, tensile strength, and elongation values, strain gages were used to determine Young's modulus and Poisson's ratio. A study of plastic anisotropy was also made.It is shown that several types of textures exist in these alloys and the characteristics of the mechanical properties are anisotropic and related to the texture type. A simple approximation of the anisotropic behavior patterns can be understood-by relating these patterns to single-crystal properties.

Properties of Textured Titanium Alloys

“…Titanium and titanium alloys [79][80][81] exhibit anisotropy with regard to their plastic properties. The magnitude of plastic anisotropy in such polycrystalline hexagonal materials is much greater than that found in…”

“…During the course of one investigation, it was bund that greater precision could be obtained by using st••ain gages oriented at 90 degrees and bonded to the face •)f the specimens. Under these test conditions, the width and longitudinal strains are measured, and it is com•enient to POLE FIGURES OF VARIOUS TITANIUM ALLOYS[81]…”