EROSION BEHAVIOR OF TINI ALLOY FOILS UNDER VARIOUS HEAT-TREATMENTS

The erosion behaviour of TiNi alloy foils (Ni: 50.5 at pct, thickness: 70-90 mu m) under various heat treatments has been studied with two d ifferent tests: sand-blasting erosion (SBE) with impingement angle of 30 degrees and slurry erosion (SE). The erosion resistance of the foil s aged at 400-450 degrees C/30 min is the best in all tests. The quenc hed foil is also good in the SBE test, but not so good in the SE test. The slurry-erosion resistance of the aged foils is better than that o f L214 with high hardness. All the foils exhibit much better erosion r esistance than 18Cr-8Ni stainless steel in the tests.