Development of Fatigue Testing System for in-situ Observation by AFM & SEM

Amir Farokh Payam, Oliver Payton, Mahmoud Mostafavi, Loren Picco, Stacy Moore, Tomas Martin, A.D. Warren, David Knowles

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A three-point bend fatigue miniature stage for in-situ observation of fatigue microcrack initiation and growth behaviour by scanning electron microscopy (SEM) and atomic force microscopy (AFM) has been manufactured. Details of the stage design with finite element analysis of the stress profiles on loading are provided. The proposed stage facilitates study of the micro mechanisms of fatigue when used during SEM and AFM scanning of the sample surface. To demonstrate the applicability of the system, fatigue tests have been performed on annealed AISI Type 316 stainless steel. Surface topography images obtained by SEM and HS-AFM (High Speed AFM) are presented for comparison. The data can be used to validate crystal plasticity models which should then directly predict multiaxial behaviour without recourse to deformation rules such as equivalent stress or strain.
Original languageEnglish
Title of host publication ICMFF12 - 12th International Conference on Multiaxial Fatigue and Fracture
Number of pages7
Volume300
DOIs
Publication statusPublished - 2 Dec 2019

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    Farokh Payam, A., Payton, O., Mostafavi, M., Picco, L., Moore, S., Martin, T., Warren, A. D., & Knowles, D. (2019). Development of Fatigue Testing System for in-situ Observation by AFM & SEM. In ICMFF12 - 12th International Conference on Multiaxial Fatigue and Fracture (Vol. 300) https://doi.org/10.1051/matecconf/201930014002