FeMnSi系形状记忆合金的∈M马氏体相变研究

∈M-Martensitic Transformation in FeMnSi Shape Memory Alloy

用透射电镜和高分辨率电镜研究了Fe17Mn5Si10Cr5Ni合金的应力诱发εM形态。生长初期εM为厚约20nm的薄片,它在长度方向上是不连续的,间断区为各生长单元的前沿区。生长初期的εM薄片在交叉时可利用本身的间断区而相互贯穿,且不留下交互作用痕迹,由εM薄片合并成宽大的εM。这种结构特点决定了宽大的εM薄片交互作用的复杂性。

The morphology of stress induced ε M in Fe17Mn5Si10Cr5Ni alloy was investigated by Transmission Electron Microscope (TEM) and High Resolution Electron Microscope (HREM). The thickness of ε M being in initial stage of growth is about 20 nm. The unconnected area along lengthwise of ε M is at the front of each growing unit. Utilizing its unconnected area, the ε M being in initial stage of growth can intersect each other without interaction trace, and result in combining into broaden ε M. The morphology made the interaction of ε M complex.