A comparison of the cavitation erosion resistance of TiNi alloys, SUS304 stainless steel and Ni-based self-fluxing alloy
A comparison of the cavitation erosion resistance of TiNi alloys, SUS304 stainless steel and Ni-based self-fluxing alloy
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DOI：
10.1016/s0043-1648(00)00443-9
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发表时间：
2000-08
期刊：
影响因子：
5
通讯作者：
Shyi-Kaan Wu;H. Lin;C. Yeh
中科院分区：
文献类型：
--
作者：
Shyi-Kaan Wu;H. Lin;C. Yeh
研究了TiNi形状记忆合金、SUS 304不锈钢和Ni基自熔合金在淡水和3.5wt.%根据ASTM G32-85标准方法在NaCl溶液中进行。300 min空蚀后，SUS 304不锈钢的累积失重是TiNi合金的45倍，而Ni基自熔合金的累积失重是TiNi合金的15倍。TiNi合金和SUS 304不锈钢在早期空蚀阶段表现出加工硬化行为，此后在进一步的空蚀过程中保持恒定的硬度。而镍基自熔性合金在空蚀试验中没有出现硬化现象。TiNi合金的热弹性马氏体相变对其冲蚀磨损特性有重要影响。变形相的包容性、变形相的伪弹性和较高的加工硬化率可以提高TiNi合金的抗冲蚀性能。在淡水中的空蚀率与3.5wt.%的合金相近在相同的测试条件下，NaCl溶液。
Cavitation erosion of TiNi shape memory alloys, SUS304 stainless steel (SS) and Ni-based self-fluxing alloys has been investigated in freshwater and 3.5wt.% NaCl solution according to the ASTM G32-85 standard method. After 300min of cavitation erosion, the cumulative weight loss of SUS304 SS is 45 times, whereas that of Ni-based self-fluxing alloy is 15 times the value of TiNi alloys. TiNi alloys and SUS304 SS exhibit a working-hardening behavior in the early cavitation stage, and thereafter maintain constant hardness during further cavitation. However, the Ni-based self-fluxing alloy exhibits no hardening phenomenon during cavitation test. The thermoelastic martensitic transformations of TiNi alloys have important effects on their erosion characteristics. The variants accommodation, pseudoelasticity of SIM and high work-hardening rate can improve the erosion resistance of TiNi alloys. Cavitation erosion of all these alloys in freshwater is similar to that in 3.5wt.% NaCl solution under the same testing conditions.