Abstract An ultrahigh damping capacity with internal friction close to 0.35 was detected over a large temperature range of 75 °C (from -40 to 35 °C) in Ti49.2Ni50.8 shape memory wires by adjusting the B2→R phase transformation through a low-temperature aging treatment. Microstructural analysis showed that the excellent damping performance is attributed to high-density nanodomains in the R phase, which are induced by short-range Ni segregation. These results are expected to further expand capacity for designing damping microstructure.

中文翻译：

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通过调制 Ti49.2Ni50.8 形状记忆合金线材中的 R 相实现超高阻尼能力

摘要 通过调节 B2→R 相变，在 Ti49.2Ni50.8 形状记忆丝中在 75 °C（-40 至 35 °C）的大温度范围内检测到内摩擦接近 0.35 的超高阻尼能力。低温时效处理。微观结构分析表明，优异的阻尼性能归因于 R 相中的高密度纳米域，这是由短程 Ni 偏析引起的。这些结果有望进一步扩大设计阻尼微结构的能力。