Corrosion Fatigue
Mostrando 1-12 de 34 artigos, teses e dissertações.
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1. Effects of Gas Nitriding on Fatigue and Crack Initiation of Ti6Al4V produced by Selective Laser Melting
Selective laser melting (SLM) is an additive manufacturing technique which permits fabrication of three dimensional parts by selectively melting consecutive layers of metallic powder. This allows the production of parts with high geometrical complexity. Titanium alloy Ti-6Al-4V (Ti64) is widely used in industry due to its high strength-to-mass ratio, corrosi
Mat. Res.. Publicado em: 15/07/2019
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2. Experimental analysis on the combined effects of corrosion and fatigue in reinforced concrete beams
Resumo Elementos de infraestrutura, especialmente as pontes e viadutos de concreto armado, estão expostos a uma combinação de processos de degradação enquanto em serviço, como a corrosão de armaduras e fadiga. Os efeitos combinados de ambos os processos são conhecidos por serem mais prejudicais para a estrutura quando comparados à soma de ambos os p
Ambient. constr.. Publicado em: 10/06/2019
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3. Morphology of the DIN 100Cr6 Case Hardened Steel after Plasma Nitrocarburizing Process
Nitrocarburizing is considered one of the most important thermochemical treatments for surface modification of metallic materials and involves the simultaneous diffusion of nitrogen and carbon onto the surface. Understanding and controlling the formation of the nitrocarburized layer have considerable industrial interest due to the improvements regarding wear
Mat. Res.. Publicado em: 04/04/2019
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4. Fracture Behavior and Fatigue Performance of Inconel 625
Inconel 625 is a nickel-based highly-resistant superalloy widely used in aerospace components, in the nuclear industry, and especially in the maritime industry. Materials such as Inconel 625 have been widely used in oil exploration of Brazilian pre-salt layers due to their excellent resistance to corrosion under tension, pitting and crevice corrosion by chlo
Mat. Res.. Publicado em: 25/06/2018
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5. Microstructure and Mechanical Properties of ASTM A743 CA6NM Steel Welded by FCAW Process
CA6NM steel is widely used in the manufacture of hydraulic turbines metallic parts, due to its resistance to corrosion and cavitation damage, combined with good weldability and fatigue properties. However, welding of this type of steel is complex and to ensure a minimum residual stress after welding it is necessary perform a post welding heat treatment (PWHT
Mat. Res.. Publicado em: 21/09/2017
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6. Análisis de falla de los bujes del tornillo de una extrusora utilizada para procesar pintura en polvo
ABSTRACT This article aims to present the failure analysis of extruder screw bushings used for the manufacture of powder paint. Two bushings, one from the transition zone and one from the metering zone were selected to carry out the study. Chemical composition and microstructural analysis, hardness testing and a detailed analysis of the failed surfaces by vi
Matéria (Rio J.). Publicado em: 22/06/2017
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7. Controlled Pre-Corrosion Attack and Ultrasonic Fatigue Endurance of Titanium Alloy Ti-6Al-4V
Abstract Ultrasonic fatigue tests were carried out on titanium alloy Ti-6Al-4V on the base material and the pre-corroded specimen to assess the pre-corrosion effect on the fatigue life of this alloy. The pre-corrosion was obtained by immersion of specimens in an acid solution: hydrochloric acid with 1.4 of pH during 8 and 16 minutes. All ultrasonic fatigue t
Lat. Am. j. solids struct.. Publicado em: 2017-03
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8. Environmentally-assisted Fatigue Crack Growth in AA7050-T73511 Al Alloy and AA2050-T84 Al-Cu-Li Alloy
The aim of this study was to evaluate and compare the effect of low temperature and saline environment on the fatigue crack growth behavior of the AA7050-T7451 Al alloy and the recently developed AA2050-T Al-Cu-Li alloy. Fatigue at room and low temperature and corrosion-fatigue tests were carried out using an applied stress ratio (R) of 0.1, 15 Hz frequency
Mat. Res.. Publicado em: 04/12/2015
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9. Mechanical Characterization of Ti–12mo–13nb Alloy for Biomedical Application Hot Swaged and Aged
Beta titanium alloys were developed for biomedical applications due to the combination of its mechanical properties including low elasticity modulus, high strength, fatigue resistance, good ductility and with excellent corrosion resistance. With this perspective a metastable beta titanium alloy Ti-12Mo-13Nb was developed with the replacement of both vanadium
Mat. Res.. Publicado em: 23/10/2015
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10. Effect of the Shot Peening Process on the Corrosion and Oxidation Resistance of AISI430 Stainless Steel
Ferritic stainless steels are used in specific applications where corrosion resistance, oxidation resistance and a high mechanical resistance are required. Shot peening is a process applied to add residual compression stresses in metallic surfaces with the intent of improving the material when exposed to corrosion due to stress and fatigue. Some studies abou
Mat. Res.. Publicado em: 2015-06
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11. Experimental evaluation of cyclic fatigue resistance of four different nickel-titanium instruments after immersion in sodium hypochlorite and/or sterilization
NiTi instruments have a high risk of separation due to torsional or flexural fatigue (cyclic fatigue). Chemomechanical preparation, cleaning procedures, chemical disinfection and sterilization cause the corrosion of endodontic instruments that may weaken the fracture resistance of the instruments. Objective To assess the effects of NaOCl immersion and auto
J. Appl. Oral Sci.. Publicado em: 2013-12
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12. Effect of salt-water fog on fatigue crack nucleation of Al and Al-Li alloys
Fatigue and corrosion-fatigue tests were performed to quantify the fatigue properties of AA2524-T3 and AA2198-T851 Al alloys. High cycle axial fatigue tests were carried out under air and salt-water fog conditions. In air, the specimens were fatigue tested at a frequency of 50 Hz, using specimens with and without preconditioning in a salt spray chamber, and
Mat. Res.. Publicado em: 26/11/2013