Changes in microstructure (e.g., precipitation of chromium and iron intermetallic phases) during long-term exposure at the service temperature and their effect on these properties is of concern. Creep deformation and rupture at temperatures of 200 °C (392°F) or less is not likely to be relevant.
CiteSeerX INFLUENCE OF DIFFERENT MECHANICAL PROPERTIES CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda):Under exploitation conditions in service microstructure and mechanical properties of metallic materials degrade causing sometimes significant reduction of some particular components life. Microstructure evolution through components material service has different influence on degradation of different mechanical properties.
Corrosion and Materials Degradation (ISSN 2624-5558) is a peer-reviewed open access journal published quarterly by MDPI.. Open Access free to download, share, and reuse content. Authors receive recognition for their contribution when the paper is reused. Rapid Publication:manuscripts are peer-reviewed and a first decision provided to authors approximately 20.5 days after submission
DEGRADATION OF 0.5Cr-0.5Mo-0.25V STEEL Degradation of 0.5Mo-0.5Cr-0.25V material after long-term high-temperature service has been studied by means of microstructure and mechanical properties analysis. Samples were taken from the pipeline with steam leaking found after almost 200,000 h service at 565 °C. The microstructure and
Effect of Selective Laser Melting on Microstructure Currently, additive manufacturing, e.g., selective laser melting (SLM), of biodegradable metals and alloys for implant applications is drawing increasing attention. 1-5 This new class of materials is of highest interest as it enables progressive implant degradation after providing temporary support on the healing processes of the diseased tissue.
Dec 17, 2013 · The properties of materials of the heat-exchange equipment components of the fast breeder reactor BN-600 after 130000170000 h of operation at 500550°C are studied. The effect of long-term aging on the strength, ductility, impact strength, and fracture toughness of 18Cr-9Ni steel (type 304 stainless steel) and its welds is examined. The mechanisms that give rise to changes in the
HARDNESS AS INDICATOR OF MATERIAL in the steel microstructure due to long-lasting operation. Microstructural changes under the influence of temperature, stress and environment in exploitation cause the substantial degradation of mechanical properties. Hardness test cannot be used for the final assessment of the
INFLUENCE OF DIFFERENT MECHANICAL PROPERTIES Microstructure changes under the influence of temperature, stress and environment in exploitation cause the substantial degradation of mechanical properties. Considering presented results of different tests it is obvious that all investigated properties are degradated but with different level.
The final structure image after prolonged exploitation is ferrite with rather homogeneously distributed precipitations inside grains and chains of the significant amount of precipitations on their boundaries, [8]. Microstructure changes under the influence of temperature, stress and environment in exploitation
Influence of long-term cold climate operation on structure Aug 01, 2019 · The revealed microstructure degradation exerts only little effect under static tension and by hardness measurements. After long-term service, the fatigue life decreased by ~16 %. The impact fracture toughness of the used steel is maximum decreased by a factor of ~2.2 at T = 70 °C.
Influence of long-term cold climate operation on structure Aug 01, 2019 · The revealed microstructure degradation exerts only little effect under static tension and by hardness measurements. After long-term service, the fatigue life decreased by ~16 %. The impact fracture toughness of the used steel is maximum decreased by a factor of ~2.2 at T = 70 °C.
ANTONOV aircrafts after long term exploitation show the fruitfulness of proposed approaches. Introduction To estimate the technical state and residual life of aging aircraft during long-term operation it is important to distinguish the categories of (1) degradation of aircraft components and (2) degradation of materials [1,2].
Mechanical and Microstructure Properties of Biochar-Based Many studies have examined the microstructure of the hardened mortar with and without internal curing and it was found that internal curing can improve the concrete durability by inhibiting the formation of the percolated pathways and densifying the interfacial transition zone (ITZ) between the porous aggregates and cement paste [15,16,19,32,33].
Microstructural Changes of Al-Cu Alloys After Prolonged Microstructural Changes of Al-Cu Alloys After Prolonged Annealing at Elevated Temperature, Recent Trends in Processing and Degradation of Aluminium Alloys, Zaki Ahmad, IntechOpen, DOI:10.5772/22195. Available from:Over 21,000 IntechOpen readers like this topic. Help us write another book on this subject and reach those readers
Microstructure degradation of Ni/CGO anodes for solid oxide fuel cells after long operation time using 3D reconstructions by FIB tomography A. Zekri, M. Knipper, J. Parisi and T. Plaggenborg, Phys. Chem. Chem. Phys. , 2017, 19 , 13767
PR 1 ANALYSIS OF THE GRAIN BOUNDARY phase [2]. Loss of long-term strength provides the growth of internal stresses, which leads to the destruction of grain boundary the alloy. Although most microstructure changes can be restored by special heat treatments, many structural defects can be persist after them [3, 4]. The Inconel 738C (IN738) super alloy, developed in 1968, is
Regenerative Heat Treatment of Prolonged Exploited Heat Jan 01, 2018 · Decrease of mechanical properties of exploited material is caused by changes in the steel microstructure due to long-lasting service operation. Reduction of toughness properties caused by long-term exploitation of the steel at elevated temperature depends to
The influence of long term annealing on microstructure of Al-Cu4-Ni2-Mg aluminum alloy was investigated. The castings were subjected to T6 heat treatment followed by annealing at 523 K and 623 K for 100, 150, 300, 500 and 750 hours. The soaking time and temperature was adjusted by corresponding to real service conditions of the elements of an aircraft and motor engines from investigated alloys.MICROSTRUCTURE DEGRADATION AFTER PROLONGED Metallographic testing can be used for following of microstructure evolution and estimation of components further safe service time, but at the same time knowing of changes in material microstructure is necessary for better understanding of mechanical properties degradation mechanism. Microstructure as indicator of material degradation of heat resistant steamline steel 14MoV6-3 after almost 200.000 hours of exploitation
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