This paper describes the use of repair brazing for gas
turbine hot parts, especially vanes and blades. The
limited weldability of superalloys that can operate at
high temperatures and under high mechanical loading,
required in modern gas turbines, has lead to the
development of repair brazing techniques for various
crack types and for restoration of dimensional changes.
Methods to characterise these joints are necessary for
the development work, the quality control of the
procedures and acceptance of refurbished parts. These
methods are mainly various NDT techniques, metallography
and service simulating mechanical testing, such as creep
and thermal fatigue testing of joints.
|BALTICA V - Condition and Life Management for Power Plants
|6/06/01 → 8/06/01