Variable Amplitude Testing of 2024-T351 Aluminum Alloy Using Ultrasonic and Servo-hydraulic Fatigue Testing Equipment. (2015)

• Record Type: Journal Article
• Authors: Fitzka, M.; Mayer, H.
• Is Part Of: Procedia engineering. Volume 101(2015)
• Page Start: 169
• Page End: 176
• Publication Date: 2015
• Subjects: very high cycle fatigue -- ultrasonic fatigue testing -- load-time history -- variable amplitude loading; Engineering -- Congresses; Engineering -- Periodicals; Engineering; Conference proceedings; Periodicals; 620.005
• DOI: 10.1016/j.proeng.2015.02.022
• Languages: English
• ISSNs: 1877-7058

Abstract

Abstract: Ultrasonic fatigue testing allows time saving investigations up to the very high cycle fatigue regime. The high frequency and adapted testing method may influence measured fatigue properties. Servo-hydraulic and ultrasonic test data of 2024-T351 aluminum alloy show comparable lifetimes for constant amplitude tests at load ratio R=0.1 and R=0.5. In ultrasonic variable amplitude (VA) tests, amplitude is varied over successive pulses ("block loading") rather than cycles ("single-cycle loading"). Lifetimes agree for servo-hydraulic and ultrasonic VA block-loading tests at R=0.1. Considerably lower lifetimes measured in servo-hydraulic single-cycle tests suggest a pronounced influences of the loading sequence on VA fatigue damage.