The effect of thermal oxidation on the fatigue behavior of Ti6Al4V and Ti6Al7Nb alloys

Meydanoglu O., Cingi M., Baydoğan M., Çimenoğlu H., Kayali E. S.

137th Annual Meeting and Exhibition of the Minerals-Metals-and-Materials-Society, Louisiana, United States Of America, 9 - 13 March 2008, pp.411-415 identifier

  • Publication Type: Conference Paper / Full Text
  • City: Louisiana
  • Country: United States Of America
  • Page Numbers: pp.411-415
  • Istanbul Technical University Affiliated: Yes


In this study, the effect of thermal oxidation on fatigue behavior of Ti6Al4V and Ti6Al7Nb alloys has been examined. Thermal oxidation was carried out by holding the alloys at 600 degrees C for 60 h in normal atmospheric condition. Upon thermal oxidation the surfaces of the alloys were covered with a 1-2 mu m thick oxide layer supported by a 6-7 mu m thick oxygen diffusion zone. Thermal oxidation caused considerable increase in surface hardness without altering the tensile properties (with the exception of yield strength) significantly. When compared to the as-received state, thermal oxidation caused a reduction in rotating bending endurance limit almost about 30% for Ti6Al4V alloy and about 10% for Ti6Al7Nb alloy.