Formation of microstructures responsible for remarkable properties of the Ni- and Co-based superalloys

Ustinovshikov, Y.

doi:10.1016/j.actamat.2016.02.051

Cited by 14 publications

(3 citation statements)

References 21 publications

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“…Each diffusion micro-pair occupies its own microscopic area. All phases formed in ternary alloys comprised atoms of no more than two components [8]. In the Ni53Mo35Al12 alloy, this process has its own characteristics, since the aluminum and Molybdenum atoms form the Mo3Al chemical compound, the melting point of which is about 2600°C.…”

Section: Resultsmentioning

confidence: 99%

Fundamental changes in notions of the metallic alloy’s nature

Yuri Ustinovshikov

2023

GSC Adv. Res. Rev.

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The article "Fundamental changes in notions of the metallic alloys nature" is a collection of ideas and experimental results that unequivocally indicate that modern ideas about metallic alloys should become to history of alloys. Here we present to the reader the results of experiments obtained on two binary alloys Ni75Mo25 and Ni88Al12, as well as on one ternary alloy Ni53Mo35Al12. These data are identical to the data we presented earlier obtained on alloys of 17 binary systems and seven ternary alloys. Briefly, the main conclusions of the experiments are as follows: · Interatomic chemical interactions exist in all metal alloys at temperatures of both solid and liquid states. · Chemical bonds in alloys have an amazing property to change their sign at a certain temperature (there is a phase transition "ordering - separation"). · The reason for this transition is the electronic transition "ionic bond ↔ covalent bond". · The process of formation of new phases in alloys begins with the formation of diffusion micro-pairs formed during the melting of the alloy. Such considerable differences between the existing notions about the nature of alloys and those revealed in this work should lead to changes in the technology of heat treatment of alloys, in the binary phase diagrams and to a change in the principles of creating new alloys.

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Section: Resultsmentioning

confidence: 99%

Fundamental changes in notions of the metallic alloy’s nature

Yuri Ustinovshikov

2023

GSC Adv. Res. Rev.

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“…Subsequently, tens of antioxidant and corrosion-resistant cobalt-based superalloys were developed through adjusting the content of Ni, Cr and rare earth elements and gradually applied M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT 5 in surfacing technology [11,12]. According to the study of Hou et al, (Cr,Fe) 7 C 3 , cobalt-based solid solution with a face-centered cubic structure, and plenty of stacking faults were observed in cobalt-based alloys after surfacing [13].…”

Section: A N U S C R I P Tmentioning

confidence: 99%

Study on the combination of cobalt-based superalloy and ferrous alloys by bimetal-layer surfacing technology in refabrication of large hot forging dies

Shen

Zhou

Xiong

et al. 2017

Journal of Alloys and Compounds

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“…Hastelloy C276 finds good use across variety of chemical applications under severe corrosive environments. It is also widely used in nuclear and chemical reactors, heat exchangers, evaporators, pressure vessels and high strength nuts, bolts and bearings [2].…”

Section: Introductionmentioning

confidence: 99%

Microstructural Characterization and Evaluation of Sliding Wear of Hastelloy C276 under Different Loading Conditions

Sahu*¹,

Kund²

2019

IJITEE

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Hastelloy C276 is investigated for dry sliding wear against an EN 31 stainless steel (hardness 60 HRC) at 298 K. The tribological properties such as frictional force, coefficient of friction and the wear rate on the material surface at different sliding distance are examined under different loading conditions. In the dry wear test at 40 N load, the wear rate increased by 300% as compared to 10, 20, 30 N loading conditions. The experimental results indicated reduction in coefficient of friction values and thus an increase in the frictional force with the increase in normal load. SEM images of worn out surfaces confirm that the delamination and adhesion causes the material removal from the surface in dry sliding. Further, the analysis of the hardness characteristics of worn out surfaces shows surface hardening during sliding wear process under 40 N load

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Formation of microstructures responsible for remarkable properties of the Ni- and Co-based superalloys

Cited by 14 publications

References 21 publications

Fundamental changes in notions of the metallic alloy’s nature

Fundamental changes in notions of the metallic alloy’s nature

Study on the combination of cobalt-based superalloy and ferrous alloys by bimetal-layer surfacing technology in refabrication of large hot forging dies

Microstructural Characterization and Evaluation of Sliding Wear of Hastelloy C276 under Different Loading Conditions

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