Abstract
The inspection of the weld zone is required, because the welding product of the pure titanium increases. The rediography is effective for the detection of defects inside the weld zone. However, the exposure chart for deciding the testing conditions of the radiography on the titanium has not been announced officially yet. First, the exposure charts of the pure titanium were made for this study. And it is examined that the relationship between defects detected by non-destructive testing and mechanical strength. Thus, the following is clarified: (1) The radioparency rate of the titanium is between aluminum and steel. (2) The deformability of weld part is very much decreased by the oxidation state of ash color. But the decrease of the tensile strength is a little. (3) The effect of the undercut to weld part is nearly equal to the oxidation state of ash color. (4) The penetration shortage is greatly made to lower tensile strength and deformability.
