Micro and Macromechanical Study of Stress-Induced Martensitic Transformation in a Cu-Al-Be Polycrystalline Shape Memory Alloy
Micro and Macromechanical Study of Stress-Induced Martensitic Transformation in a Cu-Al-Be Polycrystalline Shape Memory Alloy
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DOI：
10.4028/www.scientific.net/msf.509.87
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发表时间：
2006-02
期刊：
影响因子：
--
通讯作者：
F. Sánchez;G. Pulos
中科院分区：
文献类型：
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作者：
F. Sánchez;G. Pulos
采用单轴拉伸试验研究了Cu-Al-Be多晶形状记忆合金的微观和宏观应力诱发马氏体相变。在不同的应力状态下采集数字图像。对图像序列进行分析，估计光流场，得到位移矢量场。实验是在光学显微镜下的小型液压加载装置上进行的。应力-应变曲线和相关图像显示了特定晶粒中的应力诱发马氏体相变。得到了多晶形状记忆合金的位移矢量场。由于马氏体相变和晶间相互作用，它们是不均匀的。
An experimental investigation of the micro and macromechanical stress-induced martensitic transformation in a Cu-Al-Be polycrystalline shape memory alloy is undertaken using a uniaxial tension test. Digital images are acquired at different stress states. The image sequences are analyzed to estimate the optical flow to get displacement vector fields. The experiments are carried out on a miniature hydraulic loading device mounted under an optical microscope. The stress-strain curves and associated images show stress-induced martensitic transformation in specific grains. Displacement vector fields for the polycrystalline shape memory alloy are obtained. They are inhomogeneous due to the martensitic transformation and inter-granular interactions.