PSI - Issue 7

Šulko Miroslav et al. / Procedia Structural Integrity 7 (2017) 262–267

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Šulko Miroslav et Al./ Structural Integrity Procedia 00 (2017) 000–000

- both the micro hardness and the hardness are not always mathematically unambiguous - depending on the type of material, its internal structure, and the amplitude of the loading cycle - for more general conclusions, it is necessary to obtain further experimental results, which are time consuming and technically demanding. Acknowledgements The presented contribution has been prepared under project LO1502 “Development of the Regional Technological Institute” under the auspices of the National Sustainability Programme I of the Ministry of Education of the Czech Republic aimed to support research, experimental development and innovation. References McGrath, J.T., Waldron, G.W.J., 1974. Phil.Mag. 9, 1974, p.249 Klesnil, M., at all. 1993. Cyclic deformation and fatigue of metals. Elsevier Ye, D., Wang, Z., 2001. An approach to investigate pre-nucleation fatigue damage of cyclically loaded metal using Vickers micro hardness tests, International Journal of Fatigue 23, p.85-91 Ye, D., Tong, X.,1998. Fatigue hardening / softening behavior investigated through Vickers micro hardness measurement during high – cycle fatigue. Materials Chemistry and Physics 56, p.195-204 Margetin, M.,2012. Contribution to fatigue life time evaluation of welded joints. PhD thesis, Slovak university of technology. Garan, M., 2010. Monitoring of fatigue damage by sensing the strain state. PhD thesis. Slovak university of technology.