Ni50.3Ti29.7Hf20 高温形状记忆合金中的应变玻璃态

IF 5.3 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Scripta Materialia Pub Date : 2024-11-13 DOI:10.1016/j.scriptamat.2024.116449

Longjia Li , Zhongsheng Yang , Kengfeng Xu , Dingcong Cui , Lei Wang , Zhijun Wang , Junjie Li , Jincheng Wang , Feng He

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引用次数: 0

摘要

镍钛铪合金是高温形状记忆致动器最有前途的候选材料之一。尽管人们对 NiTiHf 的相变行为已经有了很好的了解，但仍有新的发现。在此，我们首次报告了镍钛钨合金的应变玻璃态。我们的研究结果表明，在快速冷却过程中产生的 H 相前驱体抑制了 NiTiHf 的正常马氏体相变，从而导致了应变玻璃态。此外，我们还通过改变冷却速度成功地控制了应变玻璃化转变。这些新发现使 NiTiHf 系统有望成为高温超弹性材料。

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Strain glass state in Ni50.3Ti29.7Hf20 high-temperature shape memory alloy

NiTiHf alloy is one of the most promising candidates for high-temperature shape-memory actuators. Although the phase transition behavior of NiTiHf is well understood, there are still new revelations. Here, we for the first time report the strain glass state in a NiTiHf alloy. Our results demonstrate that the H-phase precursor generated during rapid cooling suppresses the normal martensitic phase transition of NiTiHf, leading to the strain glass state. Moreover, we successfully controlled the strain glass transition via changing the cooling rate. These new findings make the NiTiHf system promising for high-temperature superelastic materials.

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来源期刊

Scripta Materialia 工程技术-材料科学：综合

CiteScore

11.40

自引率

5.00%

发文量

581

审稿时长

34 days

期刊介绍： Scripta Materialia is a LETTERS journal of Acta Materialia, providing a forum for the rapid publication of short communications on the relationship between the structure and the properties of inorganic materials. The emphasis is on originality rather than incremental research. Short reports on the development of materials with novel or substantially improved properties are also welcomed. Emphasis is on either the functional or mechanical behavior of metals, ceramics and semiconductors at all length scales.