Effects of Cryogenic Treatment on the Thermal Physical Properties of TC4 Titanium Alloy

A cryogenic treatment test was carried on TC4 titanium alloy,and the effects of cryogenic treatment on the thermal physical properties of TC4 titanium under the temperature range of 25~600°C were investigated through comparing the variation of the thermal conductivity and thermal expansion coefficient of the alloy before and after cryogenic treatment.The results show that the thermal conductivity of the cryogenic treated alloy is first less and then greater than that of the untreated alloy,however,its thermal expansion coefficient is first greater and then less than that of the untreated alloy with the increase of temperature.When the temperature is up to 600°C,the thermal conductivity and thermal expansion coefficient of the cryogenic treated alloy are 7.24 W·m-1·K-1 and 11.71×10-6°C-1,and increased and decreased by 3.18%and 1.65%than that of the untreated alloy at the same temperature,respectively.