MATEC Web Conf.
Volume 300, 2019ICMFF12 - 12th International Conference on Multiaxial Fatigue and Fracture
|Number of page(s)||7|
|Section||Recent Development in Experimental Techniques|
|Published online||02 December 2019|
Development of Fatigue Testing System for in-situ Observation by AFM & SEM
Solid Mechanics Research Group, Department of Engineering, University of Bristol, Bristol, UK
2 School of Engineering, Ulster University, Belfast, UK.
3 Interface Analysis Centre, HH Wills Physics Laboratory, University of Bristol, Bristol, UK
4 Department of Physics, Virginia Commonwealth University, Virginia, USA
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.
© The Authors, published by EDP Sciences, 2019
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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