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我们新研制的51.6at.-％Ni-Ti合金可以通过热处理获取超弹特性,该合金的应力诱发相变过程包括两个阶段——预马氏体转变和马氏体转变,分别与σ-ε曲线的不同线段相对应,整个相变过程在卸载时完全可逆。这个结论与通常的解释不完全一致。本文对该相变过程作进一步的研究。实验在H1TACH H-700型透射电镜上加载观察,其拉伸台由马达驱动,对样品作速度连续可调的单向拉伸,拉伸位移的指示精度为20μm/格。试样制成～3×5mm条
Our newly developed 51.6at .-% Ni-Ti alloy can be obtained by heat treatment super elastic properties of the alloy stress-induced phase transition process consists of two stages - the pre-martensitic transformation and martensitic transformation, respectively, and σ- ε curve corresponding to different line segments, the entire phase change process is completely reversible when unloading. This conclusion is not completely consistent with the usual explanation. In this paper, the phase transition process for further research. The experiment was carried out on an H1TACH H-700 transmission electron microscope. The tension stage was driven by a motor, and the specimen was continuously and uniaxially stretched at a speed of 20 μm / cell. Sample made ~ 3 × 5mm bar