Hot-salt-stress-corrosion cracking of titanium alloys

The H.S.S.C.C. (Hot-Salt-Stress Corrosion-Cracking) of certain titanium alloys (Ti 5 Al-2.5 Sn; Ti-6 Al-4 V; Ti-8 Al-1 Mo-1 V; Ti-13 V-11 Cr-3 Al) was investigated both by means of exposure experiments with U-bend specimens and by means of electrochemical experiments with a macro-couple model proposed by the authors of this paper. With this model it has been possible to confirm that there is an electrochemical mechanism for this form of corrosion and to perfect a system capable of revealing the incubation period of cracks as a function of environmental, metallurgical and mechanical factors with good reproducibility and accuracy.