Method for recognizing structural inhomogeneities in titanium alloy test samples including welded samples

摘要

Titanium alloy test samples including welded samples of such alloys are tested for recognizing textural or structural faults or flaws in the form of segregations or liquations. To make these flaws visible by increasing the contrast between a flaw and the background, an etching method including two etching steps is used, which achieves especially marked contrasts. The method is based on the selective solution removal of a phase, a grain, or of an impurity of an alloy type. An especially good visual recognition of segregations, liquations or inhomogeneities of welded test samples is made possible by the resulting matte gray surface against which lustrous flaws are clearly visible.