TC4 Titanium Alloy Surface Crack Detection and Analysis

The mechanism of surface cracks penetration testing are studied, as well as, the cracks’ width and depth of penetration testing formulas are given in the paper, which provide the basis for TC4 titanium alloy structure's penetration testing. The process of fluorescent penetrating testing is analyzed, and the result that detection experiments of TC4 titanium alloy structure's surface crack indicating the changes in the curvature is larger the structure is easier to produce surface cracks. The reason that the surface cracks of structure of TC4 titanium alloy is theoretical analyzed and experimental studied. In process of machining TC4 titanium, cutting parameters are important factors causing stress concentration, particularly, the larger cutting depth will generate surface cracks.