A method of detecting contamination of titanium alloys of two-phase type having an alpha and a beta phase

Abstract

The invention relates to a method of examining a titanium alloy of two-phase type with an alpha phase and a beta phase. The method comprises the following steps: a) cutting a sample of a part made of the alloy; b) preparing a region (4) of the cut surface of the sample that is situated in the vicinity of the edge (50) of the sample, the edge (50) being in common with the outside surface (1) of the part, so as to enable the region (4) to be observed; c) observing the alpha phase of the region (4) at a magnification of greater than ×5000; d) deciding on whether granularity is present or absent in the alpha phase of a first zone (11) contiguous with the edge (50) of the sample; and e) concluding that the alloy has been contaminated with a gas if granularity is found to be absent in the alpha phase of the contiguous zone (11) whereas granularity (22) is present in the alpha phase outside the contiguous zone (11).

Dependencies are inferred from the claim text.