Results 171 to 180 of about 238 (221)

Thermoplastic‐Resin Transfer Molding Technology: Development and Challenges Toward Industrialization

open access: yesPolymer Composites, Volume 47, Issue 15, Page 13317-13358, 10 August 2026.
Illustration of the key aspects involved in the manufacture of thermoplastic composites by T‐RTM highlighting the relationships between raw materials, resin mixing strategies, polymerization parameters, and processing equipment ranging from laboratory to industrial scale. ABSTRACT Driven by increasingly stringent international environmental regulations,
Filipe P. Martins   +4 more
wiley   +1 more source

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   +2 more
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 ...
C Bathias
exaly   +3 more sources

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   +5 more
openaire   +2 more sources

Gigacycle fatigue initiation mechanism in Armco iron [PDF]

open access: yesInternational Journal of Fatigue, 2012
Abstract Microstructure irreversibility plays a major role in the gigacycle fatigue crack initiation. Surface Persistent Slip Bands (PSB) formation on Copper and its alloy was well studied by Mughrabi et al. as typical fatigue crack nucleation in the very high cycle fatigue regime.
Chong Wang, C Bathias, Q Y Wang
exaly   +2 more sources

Gigacycle fatigue of metallic aircraft components

open access: yesInternational Journal of Fatigue, 2010
Abstract According to the Paris–Hertzberg crack growth law, an analytical model shows that cracks grow from a flaw very quickly from the short to the long cracks regime, during gigacycle fatigue. The location of the initiation, at the surface or inside, has a small effect.
Claude Bathias, Paul C Paris
exaly   +3 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   +4 more
openaire   +1 more source

Influence of the metallurgical instability on the gigacycle fatigue regime

International Journal of Fatigue, 2010
Abstract In this paper several cases of metallurgical instability at high frequency are shown in order to explain what is the limitation of ultrasonic fatigue compared to regular frequency fatigue, for engineering applications. The response of the micro structure around a flaw, that is to say a stress concentration, after a great number of cycles ...
Claude Bathias
exaly   +2 more sources

The Impact of the Gigacycle Fatigue on Steel Bridges

Key Engineering Materials, 2013
Recent studies have proved that there is no fatigue limit for metallic materials; the stress life curve continuously drops even after 107 cycles. However, existing design codes assume that there is a fatigue limit. Therefore, it is important to use appropriate safety factors if existing codes are used for life evaluations.
Chaminda S. Bandara, Ranjith Dissanayake
openaire   +1 more source

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