| 引用本文: | 司曼曼,张国鑫,郑晓航,蔡伟.B掺杂Ti-Ta-Zr-Fe形状记忆合金的马氏体相变和形状记忆效应[J].材料科学与工艺,2025,33(5):1-9.DOI:10.11951/j.issn.1005-0299.20240007. |
| SI Manman,ZHANG Guoxin,ZHENG Xiaohang,CAI Wei.Martensitic transformation and shape memory effect of B-doped Ti-Ta-Zr-Fe shape memory alloys[J].Materials Science and Technology,2025,33(5):1-9.DOI:10.11951/j.issn.1005-0299.20240007. |
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| 摘要: |
| 作为重要的金属智能材料,高温形状记忆合金在航空航天、火灾预警、核反应堆等高温服役环境中具有巨大的应用价值。钛基高温形状记忆合金具有优异的冷加工性能和力学性能,但其形状记忆效应有待提升。Ti-15Ta-15Zr高温形状记忆合金具有优异的形状记忆效应和较高的相变温度,但Zr掺杂使Ti-Ta合金的冷加工性能恶化,而加入少量第4组元Fe能有效改善Ti-15Ta-15Zr合金的力学性能。利用SEM、DSC、拉伸试验等测试方法研究了B元素掺杂和热机械处理对Ti-15Ta-15Zr-0.5Fe高温形状记忆合金的影响。B掺杂可以显著地细化晶粒,降低合金的相变温度,每掺杂0.1 at.% B将使马氏体相变峰值温度Mp降低5 ℃。B元素在Ti-15Ta-15Zr-0.5Fe中的固溶度约为0.3 at.%。B掺杂量超过0.3 at.%时,B将与Ti发生共晶反应,生成短棒状或针状TiB。当B掺杂量为0.3 at.%时,合金的可回复应变最大,形状记忆效应最佳。通过掺杂0.3 at.% B元素和700 ℃/0.5 h退火处理后,(Ti-15Ta-15Zr-0.5Fe)99.7B0.3合金的晶粒明显细化,在预应变6%时合金的可回复应变达5.6%,相较于Ti-15Ta-15Zr-0.5Fe提升了25%。 |
| 关键词: 形状记忆合金 元素掺杂 马氏体相变 形状记忆效应 循环稳定性 |
| DOI：10.11951/j.issn.1005-0299.20240007 |
| 分类号:TG139.6 |
| 文献标识码:A |
| 基金项目:国家自然科学基金资助项目(51971083). |
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| Martensitic transformation and shape memory effect of B-doped Ti-Ta-Zr-Fe shape memory alloys |
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SI Manman, ZHANG Guoxin, ZHENG Xiaohang, CAI Wei
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(Institue of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150006, China)
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| Abstract: |
| As an important metal intelligent material, high temperature shape memory alloys have significant applications in high temperature service environment such as aerospace, fire warning and nuclear reactors. Titanium-based high temperature shape memory alloy has excellent cold working and mechanical properties, but its shape memory effect needs further improvement.Ti-15Ta-15Zr high temperature shape memory alloy has excellent shape memory effect and high phase transition temperature, but Zr doping deteriorates the cold working performance of Ti-Ta alloy, and the addition of a small amount of fourth component Fe can effectively improve the mechanical properties of Ti-15Ta-15Zr shape memory alloy.In this study, the effects of B doping and thermo-mechanical treatment on the Ti-15Ta-15Zr-0.5Fe high-temperature shape memory alloy were studied by XRD, DSC and tensile tests. The addition of B significantly refines the grain size of the alloy and reduces the phase transition temperature of the alloy. Each 0.1 at.% B doping reduces the peak temperature (Mp) of the martensitic phase transformation by 5 ℃. The solid solubility of B element in Ti-15Ta-15Zr-0.5Fe is about 0.3 at.%. When the doping amount of B exceeds 0.3 at.%, B reacts with Ti to form short rod-like or needle-like TiB. When the amount of B doping is 0.3 at.%, the alloy exhibits the highest recoverable strain and optimal shape memory effect. After doping with 0.3 at.% B element and annealing at 700 ℃ for 0.5 h, the grain of (Ti-15Ta-15Zr-0.5Fe)99.7B0.3 alloy is obviously refined. The recoverable strain of (Ti-15Ta-15Zr-0.5Fe)99.7B0.3 is 5.6% at a prestrain of 6%, which is a 25% improvement compared to Ti-15Ta-15Zr-0.5Fe alone. |
| Key words: shape memory alloy element doping martensitic transformation shape memory effect cyclic stability |
