Quantitative analysis of stability of 9%Cr steel microstructure after long-term ageing

Golański, G.; Jasak, J.; Zieliński, A.; Kolan, C.; Urzynicok, M.; Wieczorek, P.

doi:10.1515/amm-2017-0040

Cited by 19 publications

(10 citation statements)

References 21 publications

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“…The hardening with these precipitates is ensured by anchoring and hindering the motion of dislocations [6,7,9,14,15,18,29]. The calculations made for the P91 steel showed that the stress required for dislocation to "bypass" the carbide and nitride particles with the Orowan mechanism is as follows: for M 23 C 6 -39 MPa, for NbC-15 MPa, and for VN-106 MPa [30].…”

Section: Creepmentioning

confidence: 99%

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Degradation of the Microstructure and Mechanical Properties of High-Chromium Steels Used in the Power Industry

Golański¹,

Kolan²,

Jasak³

2018

Creep

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High-chromium martensitic steels are one of the basic creep-resisting construction materials used for the modernization of old and the construction of new power units. During the service under creep conditions, the metastable microstructure of martensitic steels undergoes gradual degradation. The rate of degradation mostly depends on the operating temperature, but it is also affected by stresses. The changes in the microstructure of martensitic steels have an influence on the decrease in their mechanical properties, including creep resistance. The knowledge and description of the changes in the microstructure of steels working under creep conditions allow extending the time of safe operation of the elements of power systems. The paper presents and describes the main mechanisms of degradation of 9-12%Cr martensitic steels on the basis of the independent studies and literature data.

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Section: Creepmentioning

confidence: 99%

“…The increase in the size of sub-boundaries usually takes place with the "Y" mechanism [15,17,18]. The migration with this mechanism is based on the movements of "Y" nodes that are the place where three sub-boundaries meet, which allows the coalescence of two low-angle boundaries.…”

Section: Creepmentioning

confidence: 99%

Degradation of the Microstructure and Mechanical Properties of High-Chromium Steels Used in the Power Industry

Golański¹,

Kolan²,

Jasak³

2018

Creep

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“…At Czestochowa Technical University, the group of Stefania Stachurowa and Leopold Jeziorski are investigating the use of stereological methods to describe metal microstructures (Golanski et al, 2017, Lis et al, 1977, Stachura, 1995.…”

Section: Scientific Stereological Groups In Polandmentioning

confidence: 99%

Polish Stereology – A Historical Review

Gądek-Moszczak

Matusiewicz

2017

Image Anal Stereol

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In the paper, the authors present the history of stereology development in Poland from the 1930s until now. The authors concentrate on the talented scholars whose hard work, dedication, and enthusiasm contributed to popularizing stereological methods of quantitative assessment. From Hugo Steinhaus to now, the evolution and increase in popularity of stereology is briefly shown. The most significant achievements are described in more detail.

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“…In their evaluation, the condition assessment of their materials is important and necessary [12][13][14][15][16]. It is carried out using destructive and nondestructive materials testing the result of which is referred to the available characteristics of materials both in the as-received condition and after service [17][18][19][20][21][22]. The results of these tests, supported by the extensive material characteristics database, allow for good estimation of the material condition and degree of exhaustion and determination of the time of further trouble-free service until the next scheduled inspection.…”

Section: Introductionmentioning

confidence: 99%