Shape Memory and Superelastic Technologies (SMST) (September 21-25, 2008): Fatigue Performance of Nitinol Round Wire with Varying Cold Work Reductions
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6.2 Fatigue Performance of Nitinol Round Wire with Varying Cold Work Reductions

Tuesday, September 23, 2008: 9:15 AM
Auditorium (Palazzo dei Congressi di Stresa)
Mr. David L. Plumley , Fort Wayne Metals Research Products Corporation, Fort Wayne, IN
Mr. Jeremy E. Schaffer , Fort Wayne Metals Research Products Corporation, Fort Wayne, IN
The role of cold work reduction and its effect on fatigue properties are studied by means of rotary beam fatigue testing.  Excluding the final draw pass, upstream processing parameters such as wire drawing, inter-pass annealing, and final heat treatment were held constant for all conditions investigated.  Cold worked percentages between 20% and 55% in five percent increments were subjected to rotary beam fatigue testing. An analysis of the relationship between cold work deformation and fatigue are presented.
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