Effects of the Addition of Iron and Chromium on the Structure and Properties of the Ni-Co-Mn-In Alloy
Edyta Matyja, Krystian Prusik
TL;DR
This paper studies how adding small amounts of iron or chromium to a Ni-Co-Mn-In alloy affects its structure and properties, such as microstructure and hardness.
Contribution
The study introduces new five-component Ni-Co-Mn-In-Fe/Cr alloys and evaluates their structural and mechanical properties.
Findings
Adding 1 at.% of Cr or Fe refined the microstructure with γ particles distributed in the matrix.
Adding 3 at.% of Cr or Fe led to γ formation in a dendritic and random pattern.
Microhardness increased by 21% in the Ni47Co3Mn33.5In13.5Fe3 alloy compared to the base alloy.
Abstract
In this work, small amounts of Fe or Cr were added to Ni47Co3Mn36.5In13.5 alloy (x = 0) to produce five-component alloys with nominal compositions of Ni47Co3Mn35.5In13.5Fe1, Ni47Co3Mn33.5In13.5Fe3, Ni47Co3Mn35.5In13.5Cr1, and Ni47Co3Mn33.5In13.5Cr3, which are denoted as Ni47Co3Mn36.5−xIn13.5Fex/Crx (x = 1, 3 at.% Cr/Fe) series or as Mn-series (due to the addition of alloying elements instead of Mn), and Ni47Co3Mn36.5In12.5Fe1, Ni47Co3Mn36.5In10.5Fe3, Ni47Co3Mn36.5In12.5Cr1, and Ni47Co3Mn36.5In10.5Cr3, denoted as Ni47Co3Mn36.5In13.5−x (x = 1, 3 at.% Cr/Fe) series or In-series (due to the addition of alloying elements instead of In). The polycrystalline alloys were produced using the vacuum arc melting technique. The as-received alloys were characterized in structure, homogeneity, phase composition, martensitic transformation, and microhardness. The results showed that the addition of 1…
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Taxonomy
TopicsShape Memory Alloy Transformations · High Entropy Alloys Studies · Microstructure and Mechanical Properties of Steels