Elastic constants of iron base sintered alloys after chemical heat treatment

DOI: https://doi.org/10.29114/ajtuv.vol8.iss1.303
Keywords: sintered alloys, low temperature gas nitrocarburizing (LTGNC), elastic constants, metallography, Vickers hardness, impulse resonance method, Young's modulus

Abstract

In this paper is shown the effect of applied low-temperature gas nitrocarburizing on the elastic constants and mechanical properties of iron based sintered alloys. Low temperature gas nitrocarburizing (LTGNC) was carried out under laboratory conditions at T=550oC, and short saturation times of 15 and 30 min, respectively. The process was carried out in a laboratory shaft furnace with a volume of 2 dm3, in ammonia and carbon dioxide at an HN3/CO2=7.5/1 ratio. The elastic constants were determined using a standard dynamic methodology based on a pulse resonance method. Density and porosity of the samples were determined. A metallographic analysis of the microstructure after sintering and after chemical heat treatment was carried out.

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Published
2024-06-28
How to Cite
Mincheva, D., Petrov, P., & Dimitrov, D. (2024, June 28). Elastic constants of iron base sintered alloys after chemical heat treatment. ANNUAL JOURNAL OF TECHNICAL UNIVERSITY OF VARNA, BULGARIA, 8(1), 37-44. https://doi.org/10.29114/ajtuv.vol8.iss1.303
Issue
Vol 8 No 1 (2024): Annual Journal of Technical University of Varna
Section
MECHANICS, MATERIALS AND MECHANICAL ENGINEERING
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