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Distribution of Alloying Element Atoms between γ- and γ'-Phase Particles in a Heat-Resistant Nickel Alloy.
- Source :
- Physics of Metals & Metallography; Feb2022, Vol. 123 Issue 2, p163-177, 15p
- Publication Year :
- 2022
-
Abstract
- Results of the study of the chemical composition of contacting γ- and γ'-phase particles in a granular heat-resistant nickel alloy (HNA) VV751P (Ni–15Co–12Cr–0.7V–0.3C–0.9W–2.7Mo–3.4Ti–2.0Nb–8.3Al–0.02Hf–0.008B, at %) by atom probe tomography are analyzed. Experimental and literature data on the preferential location of alloying elements in γ- and γ'-phase particles in different heat-resistant nickel alloys are considered. A criterion for the characterization of each of elements based on the ratio K = Е<subscript>v</subscript>/r<superscript>2</superscript> (where Е<subscript>v</subscript> is the number of valence electrons and r is the atomic radius of an element) is suggested. It is shown that the higher the K value, the more probable the enrichment of γ-phase particles in this element and the higher the degree of such an enriching. The lower the K value, the more probable the enrichment of γ'‑phase particles in this element and the higher the degree of such an enriching. The effect of γ- and γ'-forming elements in heat-resistant nickel alloys and other factors on the stability of the γ- and γ' phases, mechanical characteristics of disc heat-resistant nickel alloys at room temperature, and long-term strength at operating temperatures is discussed. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0031918X
- Volume :
- 123
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Physics of Metals & Metallography
- Publication Type :
- Academic Journal
- Accession number :
- 156023070
- Full Text :
- https://doi.org/10.1134/S0031918X22020028