The titanium rods produced were produced by rolling, and no defects were found in the flaw detection. However, in a short period of time, micro-cracks will be found on the surface, which will affect the use effect. May I ask you bug friends what is the main reason and how to analyze it. And how will the different tissues of titanium alloy affect the propagation of ultrasonic waves in it?
It should be a rolling orientation or there is an adiabatic shear band near the surface. Generally, the alloy falls off along the grain boundary or phase boundary under the action of ultrasound. The alloy grade, rolling process, and specification of the titanium rod are not known, and the specific reason cannot be determined. This is due to the fact that during the blank forging before rolling, the number of piercings is not enough, that is, the amount of deformation is not enough, the resulting grains are not completely refined, and the rolling process will increase the anisotropy of the material properties, you only need to After talking about the temperature and specifications of the final product, the previous process is the key to the performance, such as composition, forging and drawing process, deformation per fire, and final heat treatment temperature and time.
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