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The evolution of the fatigue in an austenitic stainless steel has been investigated by metallographic and X-ray diffraction (XRD) methods. It is shown that the operating mechanism for fatigue damage is the progressive work hardening of the material which takes place preferentially at the surface and advances gradually into the bulk. The integral breadth of the X-ray diffraction line has been used to to monitor the accumulated work hardening of laser surface treated and untreated specimens during fatigue and is proposed as a non-destructive fatigue damage parameter.

Additional information

Authors: OLCHINI A, JRC Ispra (IT);STAMM H, JRC Ispra (IT);DOS SANTOS F, JRC Ispra (IT)
Bibliographic Reference: Paper presented: SMT 11, 11th International Conference on Surface Modification Technologies, Paris (FR), September 8-10, 1997
Availability: Available from (1) as Paper EN 40717 ORA
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