NDE of PWA 1480 Single Crystal Turbine Blade Material Consultant to Lewis Research Center

Format:

Conference/Event

Author/Creator:

Klima, Stanley J., author.

Conference Name:

Aerospace Atlantic Conference & Exposition (1993-04-20 : Dayton, Ohio, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1993

Summary:

Cantilever bending fatigue specimens were examined by fluorescent liquid penetrant and radioactive gas penetrant (Krypton) NDE methods and tested. Specimens with cast, ground, or polished surfaces were evaluated to study the effect of surface condition on NDE and fatigue crack initiation. Fractographic and metallurgical analyses were performed to determine the nature of crack precursors. Preliminary results show that fatigue strength was lower for specimens with cast surfaces than for specimens with machined surfaces. The liquid penetrant and gas penetrant techniques both provided indications of a large population of defects on the cast surfaces. On ground or polished specimen surfaces, the gas penetrant appeared to estimate the actual number of voids more accurately than the liquid penetrant

Notes:

Vendor supplied data

Publisher Number:

931371

Access Restriction:

Restricted for use by site license