Grain size analysis in steel

In this example, Clemex Vision system is selected to measure the grain size of steel in accordance with ASTM E112.

Figure 1. The original image of etched steel before Gray Thresholding is viewed at 100X magnification.

Figure 2. Binarization of the original image into the blue bitplane using Gray Thresholding; (Right) Artifacts were removed and the network was inverted to obtain the grains. Touching grains were separated using Convex Hull, Separate and Zone binary transformations.

Figure 3.Binarization of the original image into the blue bitplane using Gray Thresholding; (Right) Artifacts were removed and the network was inverted to obtain the grains. Touching grains were separated using Convex Hull, Separate and Zone binary transformations.

PURPOSE

Demonstrate the ability of the Clemex Vision image analyzer to discriminate all grains in the field of view and to produce a standard ASTM E112 rating. The methods and operations used are discussed in the report linked at the bottom of this page (click the Download PDF link below).

RESULTS

Results window showing the ASTM E112 distribution.