Solid-state Phase Transformation in CuAlBi Alloy during Heating Process after Cryogenic Treatment

The phase transformation temperature and time of α+γ2→β in CuAlBi alloy during heating process after cryogenic treatment were measured by DSC method,and the transformation activation energy of α+γ2→β was also calculated.The results indicate that with the increase of heating rate,the phase transformation temperature increased.But the phase transformation time decreased.When the alloy was heated at the rate of 20℃·min-1,the phase transformation starting and ending temperature of CuAlBi alloy was 562.55℃ and 587.27℃ respectively,and the phase transformation time was 1.24 min.The phase transformation activation energy decreased with the inorease of transformed β phase fraction.