Abstract：The influence of cooling rate on the plasticity and fracture strength of Zr57Nb5Cu15. 4Ni12. 6Al10 was studied by using samples with the diameters of 2mm, 5mm, and 8mm which were prepared by the water- cooled copper mould.The experimental results indicated that the cooling rate while only gradually increased from 63K/s to 1000K/s, the the room temperature compressive plasticity, jumped from 0. 41% to 31. 43%, the fracture strength has been significantly higher from 1706MPa to 2556MPa, both show a strong dependence on the cooling rate. The differential thermal analysis reveals that the dependence is attributed to the significant increase in the free volume of the Zr57Nb5Cu15. 4Ni12. 6Al10 as the cooling rate increases.
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2018, Vol. 25 
