Effect of Boron Microalloying on Microstructure and Thermoelastic Martensitic Transformation in Aged NiFeGa(B) Alloys

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发表日期：

2024年9月20日

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I. D. Kurlevskaya,
E. Yu. Panchenko,
E. I. Yanushonite,
A. B. Tokhmetova,
A. B. Skosyrskii,
K. Yu. Demin,
M. S. Dmitrienko

摘要

Effect of microalloying by boron, added by two different methods, on the microstructure and martensitic transformation in as-cast and aged Ni₅₄Fe₁₉Ga₂₇ alloys was studied. The increase of the aging time of the Ni₅₄Fe₁₉Ga₂₇ alloy from 0.5 to 10 h at 823 K leads to the formation of a large volume fraction of the ordered γ′-phase. Microalloying with boron inhibits the precipitation of the γ(γ')-phase and prevents its ordering. The parameters of martensitic transformation are most stable with increasing aging time of a (Ni₅₄Fe₁₉Ga₂₇)_99.7B_0.3 alloy when boron is added in the form of a NiB alloy.