Abstract:
A new Fe
60Cr
5Mo
2Ni
2W
2Mn
1C
4Si
7B
17 amorphous alloy was prepared by melt-spinning method. The nanoindentation tests were conducted on the alloy at room temperature under different peak loads (3, 5, 7, 9, 12 mN) and at different loading rates (1, 2, 3, 4, 5 mN·s
-1). The effects of loading rate and peak load on the elastic modulus, nanoindentation hardness and creep behavior were studied. The results show that the tested alloy was completely amorphous with relatively high nanoindentation hardness and high elastic modulus. With the peak load increasing (ie., the indentation depth increasing), the nanoindentation hardness of the tested alloy decreased, indicating a relatively obvious size effect, and the elastic modulus decreased slightly. With the increase of loading rate, the nanoindentation hardness and elastic modulus increased. During the holding load stage of the nanoindentation test, the tested alloy creeped. The maximum creep displacement increased with the peak load or loading rate increasing, and the creep stress exponent increased with the peak load increasing or the loading rate decreasing.