A quantitative detection method for defects in magnesium and magnesium alloys

Abstract

The invention relates to a quantitative detection method for defects in magnesium and a magnesium alloy. The quantitative detection method comprises the following steps: sequentially, continuously and thoroughly collecting images of a whole polished surface in an overlapping manner by virtue of a camera attached to an optical microscope; splicing the images, and processing overlapped parts, so as to obtain a spliced image of a whole to-be-detected cross section; clicking in a newly-built image layer in Photoshop software by virtue of a magic wand tool so as to select each defected region, and saving all defects on the whole cross section into the same image; and analyzing, aggregating and calculating all the defects in the image. The quantitative detection method has the beneficial effects that the processing process is relatively simple and convenient, the defects can be accurately extracted, and the accuracy of a quantitative detection result is improved. The quantitative detection method has reproducibility and relatively strong universality.

Description

technical field [0001] The invention relates to a quantitative detection method for defects in magnesium and magnesium alloys, and belongs to the technical field of quantitative detection of physical properties of materials. Background technique [0002] Magnesium alloy is currently the lightest metal structural material in practical applications in the world. It has the characteristics of abundant reserves, low density, high specific strength and specific stiffness, impact resistance, and easy recycling of products. It is an ideal energy-saving and environmentally friendly material that meets sustainable development. It is the third largest engineering material after steel and aluminum alloy materials, and has important application value and broad application prospects in the fields of aviation, military, automobile and 3C. [0003] During the solidification process of magnesium and magnesium alloys, due to liquid shrinkage and solidification shrinkage, large and concentrat...

AI Technical Summary

Problems solved by technology

When these standards are used for defect analysis, they have a certain scope of application. The scope of application is the microscopic evaluation method of non-metallic inclusions in rolled or forged steel with a compression ratio greater than or equal to 3, which is not universal; This method is widely used to evaluate the suitability of steel for a given application. However, due to the influence of the test personnel, it is difficult to reproduce the test results even if a large number of samples are used, and the reproducibility is poor; although the detection of the entire surface to be tested can be realized, but In the detection process, it is necessary to process each image collected and extract the phase of the target to be tested. The process is quite cumbersome; moreover, the method of extracting defects is the same as the conventional quantitative metallographic method based on image processing. The adjustment of hue, saturation, contrast, etc., is extracted by gray threshold segmentation method and clustering technology, and the accuracy needs to be improved

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