With the more readily weldable alloys used in combustors and stator vanes, extensive weld repair of these
components is possible, although distortion can become a
problem. However, with the higher strength alloys used
for rotating blades, the tendency of the base metals to
crack is a serious limitation. For this reason, repairs are
typically limited to the low stressed regions at the tip of
the blades. Furthermore, in more recent engines, including
the F class engines, oxidation resistance has also become
an important issue.