Shape memory properties and microstructure evolution of Cu–Al–Fe alloys with different Fe contents
Source abstract
Abstract
(87 −x)Cu–13Al–xFe (x: 1, 2, 3, 4, 5 wt%) alloys were prepared by arc melting deposition process. Results showed that with the increase of Fe content, the memory recovery ratio of (87 −x)Cu–13Al–xFe alloy showed a three-phase change of decrease–increase–decrease under 4% pre-strain. The memory recovery ratio of the 4Fe alloy reached 100%. The analysis shows that a Fe-rich κ phase is formed when the Fe content exceeds its solubility in the Cu–Al alloy. The κ-phase not only shifts the eutectoid point of the alloy to the right and refines the grain size but also has a “pinning” effect. This effect flattens the grain boundaries of the alloy, elongates the grains, and increases the order degree of the martensite, thereby improving its shape memory properties. However, when the Fe content is too high, the alloy will enter a sub-eutectic state, leading to the coexistence of two-phase martensite and reducing the shape memory properties of the alloy.Graphical abstract
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Shape Memory Alloy Transformations · Titanium Alloys Microstructure and Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (24)
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