Development of an iron-based alloy with a high degree of shape recovery

Authors

DOI:

https://doi.org/10.15587/1729-4061.2017.103523

Keywords:

iron-based alloy, a shape memory effect, mechanical properties, scale resistance, corrosion resistance

Abstract

We examined a technological process for receiving an iron-based alloy with a shape memory effect, substantiated the choice of chemical composition of the alloy, and selected thermal treatment modes. Research results into scale resistance revealed at heating the samples in the temperature range of 600–1000 °C, surface oxidation was not observed. In the course of experiment on corrosion resistance of the alloy, we found that the alloy is corrosion resistant and is not inclined to change the weight when exposed to 10 % solution of sulfuric acid. Study into the microstructure confirmed the existence of dispersion hardening in the alloy after the aging regimes.

Diffractogram of the alloy after hardening at a temperature of 1150 °C and cooling in the open air showed a surge that corresponds to γ-Fe, therefore, the content of residual austenite in the alloy is 100 %. Research results demonstrated that the degree of shape recovery of the proposed alloy is 78–97 %. The proposed alloy is plastic enough; it may undergo hot, warm and cold deformation in the open air. We constructed mathematical models of the impact of chemical composition of the alloy on tensile strength of the alloy and the values of a shape memory effect. The iron-based alloy with a shape memory effect can be obtained both under laboratory conditions and on industrial equipment. 

Author Biographies

Ahmed Sundus Mohammed, National Technical University «Kharkiv Polytechnic Institute» Kyrpychova str., 2, Kharkіv, Ukraine, 61002

Postgraduate Student

Department of Foundry Production

Oleg Akimov, National Technical University «Kharkiv Polytechnic Institute» Kyrpychova str., 2, Kharkіv, Ukraine, 61002

Doctor of Technical Sciences, Professor, Head of Department

Department of Foundry Production

Kateryna Kostyk, National Technical University «Kharkiv Polytechnic Institute» Kyrpychova str., 2, Kharkіv, Ukraine, 61002

PhD, Associate Professor

Department of Foundry Production

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Published

2017-06-19

How to Cite

Mohammed, A. S., Akimov, O., & Kostyk, K. (2017). Development of an iron-based alloy with a high degree of shape recovery. Eastern-European Journal of Enterprise Technologies, 3(12 (87), 30–37. https://doi.org/10.15587/1729-4061.2017.103523

Issue

Vol. 3 No. 12 (87) (2017): Materials Science

Section

Materials Science

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Copyright (c) 2017 Ahmed Sundus Mohammed, Oleg Akimov, Kateryna Kostyk

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