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On the Effect of Hydrogen on the Low-Temperature Elastic and Anelastic Properties of Ni-Ti-Based Alloys

机译:氢对Ni-Ti基合金低温弹性和非弹性性能的影响

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摘要

Linear and non-linear internal friction and the effective Young’s modulus of a Ni50.8Ti49.2 alloy have been studied after different heat treatments, affecting hydrogen content, over wide ranges of temperatures (13–300 K) and strain amplitudes (10−7–10−4) at frequencies near 90 kHz. It has been shown that the contamination of the alloy by hydrogen strongly affects the internal friction and Young’s modulus of the martensitic phase. Presence of hydrogen gives rise to a non-relaxation internal friction maximum due to a competition of two different temperature-dependent processes. The temperature position and height of the maximum depend strongly on the hydrogen content. We conclude that many of the internal friction peaks, reported earlier for differently treated Ni-Ti-based alloys, had the same origin as the present maximum.
机译:在不同的热处理条件下,研究了Ni50.8Ti49.2合金的线性和非线性内摩擦以及有效杨氏模量,这些影响会影响氢含量,在宽温度范围(13–300 K)和应变幅度(10 −7 –10 −4 ),频率接近90 kHz。研究表明,氢对合金的污染严重影响了马氏体相的内部摩擦和杨氏模量。由于两个不同的温度相关过程的竞争,氢的存在引起了非松弛内摩擦最大值。最大值的温度位置和高度很大程度上取决于氢含量。我们得出的结论是,较早报道的经不同处理的Ni-Ti基合金的许多内部摩擦峰与当前的最大值具有相同的起源。

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