Isothermal compression of CuAlBe alloy with columnar grain was conducted with control-temperature mould on universal material tensile machine to understand effects of different deformation temperature

deformation rate and deformation degree on dynamic recrystallization behavior of the alloy.It is found that

at deformation rate of 5 mm/min

recrystallization temperature is decreased with increasing in deformation degree

however

with increasing deformation rate to 10 mm/min and 20 mm/min

it is independent of the deformation degree

keeping a constant value of 550 ℃.When deformation rate is increased to 40 mm/min with 35% deformation degree

recrystallization temperature is raised to 600 ℃.Furthermore

with increasing in deformation degree

recrystallization temperature is gradually decreased to 550 ℃.When deformation temperature is lower than 450℃

grain boundary crack occurs.