The Influence of the Temperature and Ageing Time on the NiCr23Co12Mo Alloy Microstructure

Sroka, M.; Nabiałek, M.; Szota, M.; Zieliński, A.

doi:10.37358/rc.17.4.5541

Cited by 23 publications

(15 citation statements)

References 23 publications

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“…The directions of the national power industry development are also forced by the geopolitical conditions of the country. Appropriate development directions are the modernization of existing units (mainly with the capacity of 200 MW created in the years 1960-1970) and construction of modern power units for over-and transient-critical parameters [5,6]. The most effective * corresponding author; e-mail: marek.sroka@polsl.pl way to improve efficiency and reduce harmful emissions for today's carbon-fueled blocks is to raise of thermodynamic parameters values of the water-steam circuit [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Long-Term Ageing on the Degradation of the Microstructure the Inconel 740h Alloy

et al. 2020

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The Inconel 740H alloy is used in the construction of pressure components of ultra-supercritical operating parameters. The paper presents the results of microstructure analysis after 1000 and 10 000 h ageing at 700 and 750 • C. Microstructure studies were made using scanning and transmission electron microscopy. Identification of precipitations was made using X-ray analysis of phase composition. The influence of ageing time on changes in microstructure and the precipitation process of the tested alloy were described. Presented research results are a material characteristic of new generation materials, which are used in the design of elements of pressure parts of boilers and diagnostics work during operation.

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Section: Introductionmentioning

confidence: 99%

The Effect of Long-Term Ageing on the Degradation of the Microstructure the Inconel 740h Alloy

et al. 2020

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“…Common applications embrace thermal expansion, annealing studies, determination of phase transformations and the glass transition, softening points, kinetics studies, development of phase diagrams, including the determination of sintering temperature, sintering step and rate-controlled sintering. The phase transitions taking place in the continuous cooling process or the isothermal plateau is indicated by the determined difference of length [14,15,18,19,[22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

The phase transitions in selective laser-melted 18-NI (300-grade) maraging steel

Król

Snopiński

Czech

2020

J Therm Anal Calorim

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Dilatometric studies in 18-Ni steel components fabricated by selective laser melting technique were carried out to determine the influence of heating rate on transitions occurring during the heating cycle. SLM components have been examined in controlled heating and cooling cycles. For analysis, heating of the analysed materials was carried out at heating rates of 10, 15, 20, 30 and 60 °C min −1 . During the heating process, two solid-state reactions were identified-i.e. precipitation of intermetallic phases and the reversion of martensite to austenite. A simplified procedure based on the Kissinger equation was used to determine the activation energy of individual reactions. For precipitation of intermetallic phases, the activation energy was estimated 301 kJ mol −1 , while the martensite to austenite reversion was determined at the activation energy 478 kJ mol −1 .Publisher's Note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

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“…To maintain the current level of production, it is estimated that each year the modernisation of units with a total capacity of at least 2000 MW is necessary. Therefore, the important issue to be resolved has become not only the condition assessment of the pressure section of boiler and forecast about its further safe service but also the design modernisation with selection and use of new materials allowing for construction and installation of new components [1][2][3][4][5][6][7][8][9][10]. The required increase in efficiency and extension of service time of the operating high-power units, i.e.…”

Section: Introductionmentioning

confidence: 99%

Creep Characteristics of Engineering Materials

Dobrzański¹,

Zieliński²

2020

Creep Characteristics of Engineering Materials

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The assessment of suitability for further service of the basic material and circumferential welded joints of primary steam pipelines made of 14MoV6-3 steel was made based on the determined characteristics of their mechanical properties and structure. The tests were carried out on materials after service significantly exceeding the design time and 200,000 h. The mechanical properties with respect to the determined class of structure for the basic and welded joint material were compared to the determined class of damage in accordance with the Institute for Ferrous Metallurgy's own classification of the condition of materials after service under creep conditions. The residual life and disposable residual life were determined based on short-term creep tests and referred to the class of existing structure and the class of damage. The assessment of the suitability of the basic and circumferential welded joint material for further service was made.

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The Influence of the Temperature and Ageing Time on the NiCr23Co12Mo Alloy Microstructure

Cited by 23 publications

References 23 publications

The Effect of Long-Term Ageing on the Degradation of the Microstructure the Inconel 740h Alloy

The Effect of Long-Term Ageing on the Degradation of the Microstructure the Inconel 740h Alloy

The phase transitions in selective laser-melted 18-NI (300-grade) maraging steel

Creep Characteristics of Engineering Materials

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