NIMS fatigue data sheet on gigacycle fatigue properties of A6061-T6 (Al-1.0mg-0.6si) aluminium alloy at high stress ratios. Issue 1 (31st December 2022)

• Record Type: Journal Article
• Authors: Hirukawa, Hisashi; Furuya, Yoshiyuki; Nishikawa, Hideaki; Nagashima, Nobuo; Takeuchi, Etsuo
• Is Part Of: Science and Technology of Advanced Materials: Methods. Volume 2:Issue 1(2022)
• Page Start: 232
• Page End: 249
• Publication Date: 2022-12-31
• Subjects: Fatigue -- structural materials -- gigacycle fatigue -- aluminium alloy -- data sheet
• DOI: 10.1080/27660400.2022.2085020
• Languages: English
• ISSNs: 2766-0400

Abstract

ABSTRACT: The new fatigue data sheet, No. 132, discloses gigacycle fatigue properties of the A6061-T6 aluminium alloys at high stress ratios. The fatigue tests were conducted mainly by the ultrasonic fatigue testing at 20 kHz, while conventional fatigue tests at 100 Hz were also conducted for comparison. The fatigue test results indicated that fatigue limits were obscure in the A6061-T6 alloys. Many specimens failed at over 10 7 cycles, developing internal fractures as well as surface fractures. On the other hand, fatigue failures at over 10 9 cycles were very rare, suggesting the presence of new fatigue limits in the gigacycle region. The differences in fatigue test results were negligible between the 20 kHz and 100 Hz tests, demonstrating that the 20 kHz tests were comparable to the conventional fatigue tests on this material. The fatigue strengths evaluated by the stress amplitude were decreased according to increase in the stress ratios, while the degradation of the fatigue strengths was not so serious. The fatigue strengths were higher than the modified Goodman lines, meaning that the stress ratio effects could be estimated by conventional ways. GRAPHICAL ABSTRACT: uf0001