一种钛合金中等轴与片层α相复杂粘连组织分割的新方法

摘要

为了对钛合金微观组织进行定量表征，提出一种分割等轴与片层α相复杂粘连组织的新方法。该方法包含三个步骤：首先，通过计算二值化微观组织图像中每个角点的凹度值来确定凹点。其次，采用标识圆和凹点间的距离值选取凹点对。最后，提出四个准则判断连接凹点对中的两个凹点所形成的分割线是否是正确的分割线。结果表明：采用该方法可以有效地分割复杂粘连组织。%A new method for separating complex touching equiaxed and lamellar alpha phases in the optical micrograph of titanium alloy was proposed for quantitative characterization. This new method involves three steps. First, concave points of the microstructural feature are identified with a threshold of the concaveness of the corner points which are extracted from the binarized image. Secondly, concave points pairs are selected from the concave points group established by means of marker circle or distance. Third, whether a candidate separation line which connects two concave points within a pair can be accepted or not is determined by the proposed four rules. The obtained results show that this method is effective on separating complex touching microstructural features.