화학공학소재연구정보센터
Materials Science Forum, Vol.394-3, 349-352, 2001
The slurry erosion characteristics of precipitation-hardened Ti49Ni51 shape-memory alloy
The slurry erosion characteristics of precipitation-hardened Ti49Ni51 shape memory alloy have been studied using the liquid/solid impingement. Experimental results showed that the Ti11Ni14 precipitates can significantly increase the hardness of Ti49Ni51 alloy, and not affect the performance of martensite accommodation and SIM transformation. These features effectively improve the erosion resistance of Ti49Ni51 alloy. The precipitation-hardened Ti49Ni51 alloy exhibits a much lower erosion rate than SUS304 stainless steel, which is commonly used as an erosion-resistant material in hydraulic machinery. The precipitation-hardened Ti49Ni51 alloy has a maximum erosion at 30degreessimilar to45degrees impingement angles. The surface morphologies exhibit many long fur-rows and ridges at low impingement angles. Work hardening due to impingement of high-speed particles was observed on the surface of all tested materials.