Martensitic transformation and shape memory effect of TiZrHf-based multicomponent alloys
Martensitic transformation and shape memory effect of TiZrHf-based multicomponent alloys
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DOI：
10.1016/j.jallcom.2022.167496
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发表时间：
2022-10
影响因子：
6.2
通讯作者：
W. Tasaki;Yuzuki Akiyama;T. Koyano;S. Miyazaki;H. Y. Kim
中科院分区：
文献类型：
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作者：
W. Tasaki;Yuzuki Akiyama;T. Koyano;S. Miyazaki;H. Y. Kim
研制了无毒、低磁化率的多元素超弹性合金和形状记忆合金。研究了Ti-Zr-Hf-Nb-Sn合金的相组成、晶体学特征、力学性能、超弹性和形状记忆效应。根据x射线测量，确定了β相、α′相和α′相的成分。测定了相的晶格参数。根据点阵参数计算点阵变形应变。Ti-Zr-Hf-Nb-Sn合金在600 ~ 1000 MPa范围内具有较高的抗拉强度。Ti-Zr-Hf-Nb-Sn合金中存在β→α”马氏体相变和反向相变引起的超弹性和形状记忆效应。（TiZrHf） -8.5Nb-3Sn合金的超弹性恢复应变为2.1%。与医用合金相比，(TiZrHf) -8.5Nb-3Sn合金具有较低的磁化率。基于晶体学和显微组织特征，讨论了合金大超弹性恢复应变的可能性。
Novel superelastic alloys and shape memory alloys composed of multi-principal elements with non-toxic and low magnetic susceptibility were developed. Phase constitution, crystallographic characteristics, mechanical properties, superelasticity and shape memory effect were investigated in Ti–Zr–Hf–Nb–Sn alloys. According to X-ray measurements, compositions exhibitingβphase,α’ phase andα” phase were determined. The lattice parameters of the phases were also determined. Lattice deformation strains were calculated based on the lattice parameters. The Ti–Zr–Hf–Nb–Sn alloys exhibited high tensile strength in a range of 600–1000 MPa. Superelasticity and shape memory effect due toβ→α” martensitic transformation and the reverse transformation were observed in the Ti–Zr–Hf–Nb–Sn alloys. Superelastic recovery strain of 2.1% was observed in a (TiZrHf)–8.5Nb–3Sn alloy. The (TiZrHf)–8.5Nb–3Sn alloy exhibited low magnetic susceptibility comparing with alloys applied in medical fields. Potential of large superelastic recovery strain of the alloys was discussed based on the crystallographic and microstructural characteristics.