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Stress-induced reverse martensitic transformation in a Ti-51Ni (at) alloy aged under uniaxial stress

机译:Ti-51Ni(at%)合金在单轴应力下时效的应力诱导马氏体逆相变

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摘要

Ti-51Ni (at%) alloys including coherent precipitates of Ti3Ni4 exhibits thermally-induced B2-R transformation. If the Ti3Ni4 is formed under tensile stress, it orientates preferentially so that its habit plane becomes perpendicular to the tensile axis. In such specimens, stress-induced reverse R-B2 transformation is reported to occur. In the present study, the stress-induced reverse R-B2 transformation behavior was studied by infrared camera and in situ X-ray analysis. The infrared camera observation revealed that the temperature of the specimen decreases homogeneously by the application of tensile stress within the resolution of the camera. The in situ X-ray analysis revealed that stress-induced reverse R-B2 transformation and rearrangement of variants of the R-phase occurs simultaneously in the specimen.
机译:包括Ti3Ni4的相干析出物的Ti-51Ni(at%)合金表现出热诱导的B2-R相变。如果在拉伸应力下形成Ti3Ni4,则它会优先取向,以使其惯性平面垂直于拉伸轴。在这种样品中,据报道发生了应力诱导的R-B2反向转化。在本研究中,通过红外热像仪和原位X射线分析研究了应力诱导的R-B2反向转变行为。红外热像仪的观察结果表明,通过在热像仪的分辨率范围内施加拉应力,样品的温度均匀下降。 X射线原位分析表明,应力诱导的逆向R-B2转变和R相变体的重排同时发生在样品中。

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