Development of Observation System for Microdeformation Behaviorin Multi-Phase Material by White Light Interferometry

材料的力学性能由其微观结构决定，包括晶界和析出物。因此，研究每种微观结构成分的机械性能和变形行为，以开发具有优异机械性能的材料是很重要的。然而，由于微观成分的尺寸在微米量级，因此很难测量每种微观组织成分的力学性能和观察其变形行为。我们开发了一种试验机，可以测量微尺寸材料的力学性能和现场观察变形行为。该试验机配有白光干涉仪，可以以0.1 nm的分辨率测量微尺寸试样变形过程中的表面轮廓。用马氏体钢和Mg-Zn-Y合金的显微组织成分制备了微尺寸试样，测量了试样的力学性能，观察了试样的变形行为

The mechanical properties of materials are dominated by their microstructure, includinggrain boundaries, and precipitates. It is, therefore, important to examine the mechanicalproperties and deformation behavior of each microstructural constituent to develop materials with superior mechanical properties,. However , the measurement of mechanicalproperties and observation of the deformation behavior of each microstructural constituentare difficult because the size of microconstituents is on the order of microns. We have developed a testing machine that enables the measurement of mechanical properties andin-situ observation of deformation behavior of microsized materials. This testing machineis equipped with a white-light interferometer that can measure with a resolution of 0.1 nmthe surface profile of a microsized specimen during its deformation. We have measured themechanical properties and observed the deformation behavior of microsized specimensprepared from microstructural constituents of martensitic steel and Mg-Zn-Y alloy