Influence of long high-temperature aging in vacuum on the strength properties of vanadium alloys

Lyutyi, E. M.; Широков, В. В.

doi:10.1007/bf00722794

Mater Sci

1981

DOI: 10.1007/bf00722794

|View full text |Cite

Influence of long high-temperature aging in vacuum on the strength properties of vanadium alloys

E. M. Lyutyi¹,

В. В. Широков²

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

1999

2008

Publication Types

Select...

Article2

Relationship

Self Cite1

Independent1

Authors

Journals

Cited by 2 publications

(2 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Durometric measurements performed after long-term soaking in vacuum [30] and helium [23] revealed regular changes in microhardness across the cross section of the unalloyed metal and some alloys. This fact, along with the data of chemical analysis (Table 6) [46], confirm the fact of gas exchange in the system "structural metal-reactor medium."…”

mentioning

confidence: 99%

“…I -uniform across the cross section, II -with an increase in the hardness at the edge, I I I -with a decrease in the hardness at the edge, IV -intermediate, and V -with extrema [23,30,[43][44]. According to the data of microstructural and x-ray analyses, the type of microhardess profiles is governed by the nature of the metal and the medium and by operating parameters.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Methods of improving the high-tempera ture strength and corrosion resistance of vanadium and certain alloys used in reactors

Широков¹

1999

Mater Sci

Self Cite

View full text Add to dashboard Cite

We present new evidence for the high-temperature strength of vanadium and low-alloyed (up to 15 at. %) vanadium-based alloys under conditions of prolonged (up to 5000 h) high-temperature (973-1173 K) exposure to vacuum, helium, lithium and sodium melts, modeling reactor heat-transport media (10 Pa). The kinetics of phase transformations in alloys of the systems V-Zr-C, V-Nb-Zr-C, V-Mo-Zr-C, and V-Ti-O in the process of prolonged aging under stress is analyzed. It is established that the process of pre-decay of a solid solution has many stages and is intensified by the action of stresses. The corresponding isothermal diagrams of the decay of VTsU (V-Zr-C) alloy are constructed. We give recommendations as to the choice of alloying elements with the aim of enhancing the high-temperature strength of vanadium and vanadium alloys used for reactors. New alloys developed on the basis of the systems V-Ti-O, V-Nb-Zr, V-Ta-Hf, V-Cr-Sc, and V-Cr-Nd and a new method of hardening thermochemical treatment of vanadium-titanium alloys with the use of oxygen from air have found application in pilot-engineering developments for high-temperature nuclear power plants.The strategy of the development of power engineering consists of increasing the power of existing nuclear reactors, transferring to the use of the energy of fast neutrons, bringing controlled thermonuclear fusion to a commercial level, and increasing the safety margin of energy production to the maximum possible extent [1][2][3]. The analysis of the principles of selection of materials for the operating and promising fast-neutron nuclear power plants and for fusion-type reactors shows that one of the methods of upgrading their efficiency consists of raising the operating temperatures of the processes of energy conversion and transmission up to 900-1400 K and using unconventional high-temperature media. The experience in the operation of reactors and the predictions of many scientists allow one to separate the following promising media [4][5][6][7][8][9]. For fast-fission reactors, these are heat-transport media based on sodium, helium, and, in some cases, on lithium. For fusion-type reactors, we mention lithium (blanket), eutectics (tritium-reducer), helium (heat-transport medium), and vacuum (vacuum wall). For this to be realized, the development of new materials and the improvement of the reliability and serviceability of tested high-temperature metallic materials are required. These materials should meet the requirements of not only the physics of nuclear fission and lusion, but also the physicochemical requirements that are imposed by their prolonged interaction with reactor media and related ones under the simultaneous action of high temperature and loads. In this respect, according to the predictions of world-famous scientific-research centers specializing in the field of reactor materials science, the application of refractory metals, in particular, vanadium and low-alloyed vanadium alloys (up to 15 at. %) [9][10][11][12], nickel-based alloys, and special steels [...

show abstract

mentioning

confidence: 99%

mentioning

confidence: 99%

Methods of improving the high-tempera ture strength and corrosion resistance of vanadium and certain alloys used in reactors

Широков¹

1999

Mater Sci

Self Cite

View full text Add to dashboard Cite

show abstract

Thickness dependence of crystallization and melting kinetics of eutectic Sb70Te30 phase change recording film

Her

Hsu

2008

Journal of Non-Crystalline Solids

View full text Add to dashboard Cite

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

hi@scite.ai

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Influence of long high-temperature aging in vacuum on the strength properties of vanadium alloys

Cited by 2 publications

References 2 publications

Methods of improving the high-tempera ture strength and corrosion resistance of vanadium and certain alloys used in reactors

Methods of improving the high-tempera ture strength and corrosion resistance of vanadium and certain alloys used in reactors

Thickness dependence of crystallization and melting kinetics of eutectic Sb70Te30 phase change recording film

Contact Info

Product

Resources

About