The measurement of residual stress is vital in the field of welding, stress relieving, and other manufacturing processes that may introduce such stresses. Accurate measurement of residual stress and its variation with depth provides insight into the stability of the component. The PolyU Aviation Services Research Centre (ASRC) has developed a verified method for measuring residual stress in aero engine parts.
After repair, stress relief of aero engine parts may not fully remove all stress, so it is crucial to test both the part and the repair process to establish whether the repair has been successful. This is especially important for high-temperature repairs.
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