The cavitation erosion of
Ti 3Al-based alloy Ti-24Al-15Nb-1Mo was investigated by using rotating disc equipment. To simulate
the effect of the collapse of vapor cavities or bubbles, Rockwell hardness tester was used to exert a load on the small area of Ti-24Al-15Nb-1Mo alloy, and the total deformation energy and elastic deformation energy of the test material were determined. Martensitic stainless steel 0Cr13Ni5Mo was chosen for comparison. The results show that the cavitation erosion resistance of the Ti-24Al-15Nb-1Mo alloy is better than that of the 0Cr13Ni5Mo stainless steel. After 40 h of exposure to cavitation erosion, the cumulative volume loss of the former is only 0.551 mm 3, while that of the latter is 2.615 mm 3. Ti-24Al-15Nb-1Mo alloy has good
work-hardening ability and elasticity. Its elastic deformation energy approaches 1/3 of the total deformation energy in indentation test. All these characteristics make it absorb and relieve more impact energy in cavitation erosion, thus reducing volume loss, and showing excellent cavitation erosion resistance.