Study of variability and failure in al 7075-t6 under ultrasonic fatigue

Jacob J. Schichtel, Siddhant Datta, Aditi Chattopadhyay

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Recent research work investigating fatigue in ultra-high cycle regimes (on the order of 109 cycles) has challenged the conventional understanding of fatigue crack initiation and endurance limits. Aluminum alloys have been studied in these ultra-high regimes showing the expected S-N curves with increased fatigue life correlating to decreasing load amplitude, but to further understand how damage mechanisms change across different regimes, more work has to be done to analyze the governing mechanisms for fatigue crack initiation in the ultra-high cycle regime. Limited experimental evidence elucidates failure characteristics of aerospace grade aluminum alloys subjected to ultra-high cycle fatigue; hence a detailed ultra-high cycle fatigue study has been presented on Al 7075-T6 using fully reversed tension-compression (R = −1) with a focus on fatigue-fracture behavior through electron microscopy analysis and sensitivity studies using finite element analysis-based probability studies.

Original languageEnglish (US)
Title of host publicationAIAA Scitech 2021 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
Pages1-11
Number of pages11
ISBN (Print)9781624106095
StatePublished - 2021
Externally publishedYes
EventAIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2021 - Virtual, Online
Duration: Jan 11 2021Jan 15 2021

Publication series

NameAIAA Scitech 2021 Forum

Conference

ConferenceAIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2021
CityVirtual, Online
Period1/11/211/15/21

ASJC Scopus subject areas

  • Aerospace Engineering

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