Structure-phase Transformations in Dispersive-hardening 47CrNiMo Alloy at High Temperature Deterioration

Authors

  • Mukazhanov Y.
  • Maltekbassov M.
  • Akzholov Y.
  • Telebaev Y.

Keywords:

high-temperature heating, hardening, morphology, alloy, decay

Abstract

Revealed peculiarities of changing of the structure of CrNiMo alloy depending on temperature and aging time.It is disclosed that discontinuous decay forming lamellas ofa-phase occurs during the deterioration of 47CrNiMo alloy in 800-900°C temperature interval. At the same time there is a change of dispersion patterns, increasing betweenlamellae distance increases the thickness of the slats. At the front there are initial stages of the reaction slat coagulation discontinuous precipitation, which leads to a drop in the strength properties of the alloy.It is ascertained that change of decay mechanism in γ–phase from discontinuous to continuous occurs after rising the deterioration temperature to 1000°C.Phase particles can be observed already after 5 minutes of aging. Further aging at this temperature increase the volume fraction of precipitates. Similar processes occur in the alloy at 1100°C. Raising the temperature as well as increasing aging time leads to coagulation of the particles isolated α-phase. Changing the decay mechanism with a continuous intermittent causes slumping that the strength properties and increased ductility.

 

References

Rahshtadt A. Spring steels and alloys. - M.: Metallurgy, 1971. - 496 p.

SOLONIN M, Kondratiev V, Votinov S. Alloy CrNiMo-1 as a promising material for structural elements of nuclear and thermonuclear reactors with water coolant // PAST Series Materials and new materials. - 1995. - Issue 1 (52). -13-20 p.

Mukazhanov Y, Skakov M, Petrov V, Akhmetzhanov B. Effect of different modes of quenching on the mechanical properties of the spring Cr-Ni alloy // Bulletin of the National Academy of Sciences Republic of Kazakhstan.- â„–4. Almaty, 2006, 65-68 p.

Skakov M, Mukazhanov Y, Akhmetzhanov B. Phase-structural changes in precipitation hardening alloys after quenching 47CrNiMo // Proceedings of the National Academy of Sciences of the Republic of Kazakhstan. Chemical series - â„–2 (356). Almaty, 2006, 75-78 p.

Downloads

How to Cite

Y., M., M., M., Y., A., & Y., T. (2016). Structure-phase Transformations in Dispersive-hardening 47CrNiMo Alloy at High Temperature Deterioration. Asian Journal of Applied Sciences, 4(1). Retrieved from https://ajouronline.com/index.php/AJAS/article/view/3673

Issue

Vol. 4 No. 1 (2016): February 2016

Section

Articles

License

  • Papers must be submitted on the understanding that they have not been published elsewhere (except in the form of an abstract or as part of a published lecture, review, or thesis) and are not currently under consideration by another journal published by any other publisher.
  • It is also the authors responsibility to ensure that the articles emanating from a particular source are submitted with the necessary approval.
  • The authors warrant that the paper is original and that he/she is the author of the paper, except for material that is clearly identified as to its original source, with permission notices from the copyright owners where required.
  • The authors ensure that all the references carefully and they are accurate in the text as well as in the list of references (and vice versa).
  • Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Attribution-NonCommercial 4.0 International that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
  • Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
  • Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
  • The journal/publisher is not responsible for subsequent uses of the work. It is the author's responsibility to bring an infringement action if so desired by the author.