CRACKING REASON ANALYSIS OF TITANIUM ALLOY BAR ON WORKING

Titanium alloy bar was analysis by means of scanning electron microscope, optical microscope and X radial energy spectrometer . The results showed that cracking is produced before the heat treatment. The reason of cracking was that some little secondary crack and separating out brittleness secondly phase destroyed the continuum intension. On the effect of the residual stress producing by machine process, the cracking was expanded.