Retrogression and Re-Ageing In-Service Demonstrator Reliability Trials: Stage 3 Component Test Report
DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION VICTORIA (AUSTRALIA) AIR VEHICLES DIV
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Retrogression and Re-ageing RRA technology is a two stage heat treatment of 7075-T6 aluminium alloy used to improve corrosion resistance while retaining MIL-HDBK-5J structural properties. This report assesses the compliance of the reliability trials, conducted at Boeing Australia Component Repairs BACR in August 2010, with the requirements of the compliance matrix in the Stage III Design Development Plan and, by extension, the Stage III Process Specification for RRA. All properties described by items in the compliance matrix received recommended ratings of either Compliant or Non-Compliant Acceptable. Of the 15 items in the compliance matrix only four were rated Non-Compliant Acceptable.The trials demonstrated that the RRA process as defined in the Stage III Process Specification can be reliabily applied to an aircraft component in an industrial environment with a reliability exceeding 95.
- Metallurgy and Metallography