双相不锈钢中表面浮凸的测量与表征

在马氏体相变表面浮凸测量的传统手段基础上,发展了双面金相位移合成法;综合运用原子力显微术（AFM）和背散射电子衍射技术（EBSD）,对双相不锈钢中铁素体/奥氏体相变伴随的表面浮凸进行了系统的测量,包括奥氏体片条与铁素体基体的位向关系、惯习面取向以及产生浮凸的位移矢量和最大浮凸角,并用O线模型进行了初步的解释.

MEASUREMENT AND CHARACTERIZATION OF THE SURFACE RELIEF IN A DUPLEX STAINLESS STEEL

The surface relief, especially the double-tilt surface relief, associated with diffusion controlled phase transformations in some alloys, has not been well understood so far. A bottleneck is the absence of a strict and systematic measurement method. The present paper introduced a new measurement method based on the EBSD and AFM technology. Various crystallographic features were quantitatively determined by this method, including the orientation relationship (OR), the orientation of the habit plane (IO), the displacement vector inducing the surface relief and the maximum relief angle. The OR and IO were consistently in agreement with the calculated results from the O-line method. However understanding of the displacement vector and unusual large relief angle needs further study.