Abstract
The effects of the pre-compression and cyclic compression treatment at room temperature on the microstructures, microhardness, and corrosion resistance in seawater solution of the Cu50Zr50 bulk metallic glass composites (BMGCs) have been investigated. Our work shows that pre-compression treatment suppressed the precipitation of B2-CuZr and Cu10Zr7 nano-crystals from amorphous matrix and induced phase transformations, \( {\text{B}}{}_{2} - {\text{C}}{\text{u}}{\text{Zr}} + {\text{Cu}}{}_{10}{\text{Zr}}{}_{7} \to {\text{B}}{}_{19}^{\prime } - {\text{CuZr}} \). The compressive fracture strength of the as-cast sample reaches up to 1566 MPa while preserving a certain degree of plasticity with a larger microhardness of 392 HV. Moreover, appropriate pre-compression and cyclic compression treatment can enhance the microhardness of the Cu50Zr50 BMGCs. The 5 cycles compression treatment under the 1273 MPa shows the enhanced corrosion resistance in the seawater solution, while the as-cast sample exhibits the excellent pitting corrosion resistance.
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