Evaluation of residual, post-service creep-rupture properties of S-816 turbine buckets

Jonathan Carlos Contreras, University of Texas at El Paso

Abstract

An increase in the cost-effectiveness of turbine buckets can be realized by increasing their time before overhaul (TBO) and/or rejuvenating them back into a re-usable state after they have sustained creep damage. This research investigation proposes to answer the following questions: (1) what is the actual condition of the turbine buckets that have reached the end of the manufacturer's service life?; (2) can the manufacturer's service life be extended?; (3) what possibilities exist for re-furbishing the buckets and re-using them? Creep-rupture testing is to be conducted on specimens made from two sets of post-service turbine buckets, in an air atmosphere. As-received and post-rupture specimen characterization of microstructural features, coupled with hardness tests, will be conducted; fractographic examination of rupture surfaces will also be conducted.^

Subject Area

Engineering, Mechanical|Energy|Engineering, Materials Science

Recommended Citation

Contreras, Jonathan Carlos, "Evaluation of residual, post-service creep-rupture properties of S-816 turbine buckets" (2012). ETD Collection for University of Texas, El Paso. AAI1533217.
http://digitalcommons.utep.edu/dissertations/AAI1533217

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