Cavitation Erosion of Ti-Ni Shape Memory Alloy Deposited Coatings and Fe Base Shape Memory Alloy Solid

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  • Ｔｉ‐Ｎｉ形状記憶合金肉盛材およびＦｅ系形状記憶合金のキャビテーション壊食特性
  • Ti Ni ケイジョウ キオク ゴウキン ニクモリザイ オヨビ Feケイ ケイジョウ キオク ゴウキン ノ キャビテーション カイショク トクセイ

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Abstract

In this study, cavitation erosion tests were carried out by using thermal spraying and deposition of Ti-Ni shape memory alloy for the surface coating. The results show the test speciment of Ti-Ni thermal spraying has many initial defects, so that the erosion resistance is very low. The erosion resistance of Ti-Ni deposit is about 5-10 times higher than that of SUS 304, thus erosion resistance of Ti-Ni deposit is better than that of Ti-Ni thermal spraying. The cavitation erosion tests were carried out by using Fe-Mn-Si with shape memory and gummetal with low elastic modulus. The erosion resistance of Fe-Mn-Si shape memory alloy solid is about 9 times higher than that of SUS 304. The erosion resistance of gummetal is almost the same as SUS 304, because the test specimen of gummetal has many small defects on the original surface.

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