Abstract
Since small crack propagation behavior is strongly affected by microstructure, very small artificial notches with a length in the submillimeter range are needed for a systematic study of microcrack behavior. Laser processing technique with ultrashort pulses is a micromachining tool which will not cause any serious mechanical damage in metallic materials. Small artificial starter notches were manufactured in medium carbon steels with this technique and some fatigue tests were carried out. Laser affected zones could be observed at the notch boundary but cracks were initiated from the notch tips and propagated steadily. The crack paths were very tortuous like natural small cracks. The experimental results showed that the femtosecond laser processing technique is useful to introduce a small notch and allows systematic investigation of microcrack behavior.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
K.J. Miller (1982) ArticleTitleThe short crack problem Fatigue of Engineering Materials and Structures 5 223–232
S. Suresh R.O. Ritchie (1984) ArticleTitlePropagation of short fatigue cracks International Metals Reviews 29 445–476
K. Tokaji T. Ogawa Y. Harada (1986) ArticleTitleThe growth of small fatigue cracks in a low carbon steel; the effect of microstructure Fatigue and Fracture of Engineering Materials and Structures 9 205–217
Y. Murakami S. Harada T. Endo H. Taniishi Y. Fukushima (1983) ArticleTitleCorrelation among growth law of small cracks, low-cycle fatigue law and applicability of miner’s rule Engineering Fracture Mechanics 18 909–924 Occurrence Handle10.1016/0013-7944(83)90066-8
J.J. Kruzic J.P. Campbell R.O. Ritchie (1999) ArticleTitleOn the fatigue behavior of -based titanium aluminides: Role of small cracks Acta Materialia 47 801–816 Occurrence Handle10.1016/S1359-6454(98)00409-1
A. Luft U. Franz A. Emsemann J. Kasper (1996) ArticleTitleA study of thermal and mechanical effects on materials induced by pulsed laser drilling Applied Physics A63 93–101
S. Nolte C. Momma H. Jacobs A. Tünnermann B.N. Chichkov B. Wellengehausen H. Welling (1997) ArticleTitleAbblation of metals by ultrashort laser pulses Optical Letter 24 914–916
S. Nolte (2003) Micromachining M.E. Fermann A. Galvanauskas G. Sucha (Eds) Ultrashort lasers: Technology and Applications. Marcel Dekker, Inc. New York 359–394
M.D. Perry B.C. Stuart P.S Banks M.D. Feit V. Yanovsky A.M. Rubenchik (1999) ArticleTitleUltrashort-pulse laser machining of dielectric materials Journal of Applied Physics 85 6803–6810 Occurrence Handle10.1063/1.370197 Occurrence Handle1999JAP....85.6803P
Marx, M., Vehoff, H. (2005). Influence of the microstructure on crackprapagation: in situ investigation in the scanning electron microscope, presendet at the International Conference on Fracture ICF 11, Torino, Italy
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Motoyashiki, Y., Brückner-Foit, A., Englert, L. et al. Use of Femtosecond Laser Technique for Studying Physically Small Cracks. Int J Fract 139, 561–568 (2006). https://doi.org/10.1007/s10704-006-0104-5
Issue Date:
DOI: https://doi.org/10.1007/s10704-006-0104-5