Results 201 to 210 of about 954 (249)

Advances in Ultra-High Cycle Fatigue [PDF]

, 2002
Kirkham, Melanie Jean
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Fatigue crack initiation in aerospace aluminium alloys, components and structures [PDF]

Wanhill, R.J.H.
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Fatigue Evaluation Algorithms: Review [PDF]

, 2010
Brøndsted, Povl, Passipoularidis, Vaggelis   +1 more
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Gigacycle Fatigue of the Turbocharger Gear Wheel

Inorganic Materials, 2022
   The goal of the study is to elucidate the reasons for early fracture of the gear wheel teeth of a Cameron TA9000 turbocharger (1820 kW) after an operational load up to 1. 3 x 109 cycles.   The chemical composi­tion and the microstracture of the tooth metal were studied using the methods of metallography, microhardness and optical microscopy.
L. R. Botvina, M. R. Tyutin, A. R. Alexandrov   +2 more
openaire   +1 more source

Gigacycle fatigue of ferrous alloys

Fatigue & Fracture of Engineering Materials & Structures, 1999
The objective of this paper is to determine the very long fatigue life of ferrous alloys up to 1 × 1010 cycles at an ultrasonic frequency of 20 kHz. A good agreement is found with the results from conventional tests at a frequency of 25 Hz by Renault between 105 and 107 cycles for a spheroidal graphite cast iron.
null Wang, null Berard, null Dubarre, null Baudry, null Rathery, null Bathias   +5 more
openaire   +2 more sources

Gigacycle Fatigue Properties of Wrought Aluminum Alloys

Materials Performance and Characterization, 2023
ABSTRACT Fatigue data sheets of the National Institute for Materials Science disclose the results of gigacycle fatigue tests conducted on wrought aluminum alloys. The materials tested were hot-rolled plates and extruded round bars of A5083P-O (two heats), A7075-T6 (three heats), and A6061-T6 (three heats).
Yoshiyuki Furuya, Hideaki Nishikawa, Hisashi Hirukawa, Nobuo Nagashima, Etsuo Takeuchi   +4 more
openaire   +1 more source

Initiation from Low Cycle Fatigue to Gigacycle Fatigue

Advanced Materials Research, 2014
This paper is devoted to the initiation of fatigue crack in Armco iron from low cycle fatigue to gigacycle fatigue. It is shown that the basic mechanisms of initiation are very similar from a physical point of view: PSB and Grain boundary cracking. But the mechanical aspect is specific in LCF and in GCF.
Bathias, Claude, Wang, Chong
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Gigacycle Fatigue Behavior by Ultrasonic Nanocrystalline Surface Modification

Journal of Nanoscience and Nanotechnology, 2012
Nanocrystalline surface layer up to 84 microm in thick is produced on a specimen made of Al6061-T6 alloy by means of surface treatment called ultrasonic nanocrystalline surface modification (UNSM) technique. The refined grain size is produced in the top-layer and it is increased with increasing depth from the top surface.
D G, Ahn, A, Amanov, I S, Cho, K S, Shin, Y S, Pyoun, C S, Lee, I G, Park   +6 more
openaire   +2 more sources

Fatigue strength of carbon fibre composites up to the gigacycle regime (gigacycle-composites)

International Journal of Fatigue, 2006
Abstract Knowledge of the fatigue strength is necessary for design purposes also at very high numbers of load cycles. While static properties and fatigue strength curves in the low, medium and high cycle fatigue regime 1 are well investigated, only few data beyond 5×106 cycles (gigacycle fatigue regime) are available.
S MICHEL, R KIESELBACH, H MARTENS
openaire   +1 more source

Gigacycle fatigue of bearing steels

Materials Science and Technology, 2012
For a practical point of view, the bearing steels are loaded up to the very high cycle fatigue regime, in service, far away from the Wöhler regime. In the present paper, several approaches are discussed in order to open some ways of investigation, in the range of 109 cycles: accelerated fatigue testing, thermal dissipation, fish-eye formation ...
openaire   +2 more sources