Abstract

Criteria for assessing high cycle fatigue (HCF) capability are important for transitioning additive repair technologies to turbine engines. By studying the fatigue results of two additive repair technologies on Titanium (Ti) 6Al-4V coupons, acceptable HCF results for repairs can be determined by observing the confidence and reliability of the data compared to baseline results. This document details the steps and philosophies behind fabricating coupons that capture the repair capability. Furthermore, regression analysis as well as investigations of dataset distribution, fractography, and microscopy is necessary to understand repair fatigue behavior. This work provides decision gates with quantifiable metrics for advancing repair techniques.

Issue Section:
Research Papers
Topics:
Acceptance criteria, Fatigue, Maintenance, Wire, Cycles, Microscopy, Stress, Fractography

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