急动弹性：Cu74.08 Al 23.13 Be 2.79记忆合金中的雪崩和马氏体转变
Jerky elasticity: Avalanches and the martensitic transition in Cu74.08Al23.13Be2.79 shape-memory alloy
摘要：
通过动态力学分析仪测量观察到记忆合金Cu 74.08 Al 23.13 Be 2.79单晶的急动弹性。急动出现在弹性响应函数的耗散尖峰，并与奥氏体和马氏体相之间的转变过程中雪崩的形成有关。雪崩的统计数据遵循雪崩临界性P（E）与E-E成比例的预测，其中P（E）是发现能量为E的雪崩的概率。这一结果再现，在实验的不确定性，以前的研究结果声发射技术。
英文摘要：
Jerky elasticity was observed by dynamical mechanical analyzer measurements in a single crystal of the shape memory alloy Cu74.08Al23.13Be2.79. Jerks appear as spikes in the dissipation of the elastic response function and relate to the formation of avalanches during the transformation between the austenite and the martensite phase. The statistics of the avalanches follows the predictions of avalanche criticality P(E) proportional to E-epsilon where P(E) is the probability of finding an avalanche with the energy E. This result reproduces, within experimental uncertainties, previous findings by acoustic emission techniques.
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