Influence of deformation technology on fatigue properties of titanium
Journal Title: Materials Engineering - Materialove inzinierstvo (MEMI) - Year 2014, Vol 21, Issue 3
Abstract
The influence of commercially pure Titanium microstructure on fatigue properties and their improvement or deterioration is analyzed in the presented contribution. One tested material was after cold drawing the other after severe plastic deformation by Equal Channel Angular Pressing (ECAP). Intense plastic deformation (ECAP) resulted in yield point 100 % higher and UTS 97% higher than obtained by traditional cold drawing. The ductility was 57% lower than for cold drawing. However, the fatigue properties namely the degradation of fatigue properties were influenced by sever plastic deformation in a way not consistent with the usually counted influence on mechanical properties and more, the fatigue limit was lower for high numbers of fatigue cycles. For N = 5,5. 105 the fatigue limits in torsion τC for Ti after ECAP and after cold drawing were identical. For N < 5,5. 105 cycles the τC for Ti after ECAP was higher, but for N > 5,5. 105 cycles it was lower.
Authors and Affiliations
Jan Michel, Marian Bursak, Petra Lackova
Keywords
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