Method for analyzing mechanical property deficiency of test rod through scanning electron microscope and microscope

The invention discloses a method for analyzing mechanical property deficiency of a test rod through a scanning electron microscope and a microscope in the technical field of aviation casting. The method comprises the following specific implementation steps of: 1, observing whether a fracture of the test rod which fails the test has a defect or not, and carrying out FPI detection; 2, observing crystal grains of the test rod; 3, cutting open the test rod, and determining the distribution of columnar crystals and isometric crystals; 4, making the test rod into a sample, corroding the sample, andobserving the structure of the sample by using the electron microscope; 5, observing the tissue structure of the sample by using the scanning electron microscope; 6, finding out the reason of test failure by combining the electron microscope and the scanning electron microscope analysis results; and 7, finding out a solution according to the conclusion obtained above. The problem that since no scientific method exists to