Propagation of Fatigue Crack in Amorphous Fe&lt;sub&gt;40&lt;/sub&gt;Ni&lt;sub&gt;40&lt;/sub&gt;B&lt;sub&gt;20&lt;/sub&gt; at High-Fequency Loading

V. Ocelı́k; Peter Palček; P. Diko; J. Miškuf; P. Duhaj

doi:10.4028/www.scientific.net/kem.40-41.369

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Propagation of Fatigue Crack in Amorphous Fe40Ni40B20 at High-Fequency Loading

V. Ocelı́k Peter Palček P. Diko J. Miškuf P. Duhaj

Year: 1991 Journal: Key engineering materials Vol: 40-41 Pages: 369-374 Publisher: Trans Tech Publications

DOI: 10.4028/www.scientific.net/kem.40-41.369

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Abstract

This work studies the fatigue crack growth in Fe40Ni40B20 metallic glass using the stressing by longitudinal ultrasonic waves of frequency 20.2 kHz. A relation between the rate of fatigue crack propagation and stress intensity factor is derived. An extremely low threshold value of the stress intensity factor, below which a fatigue crack cannot propagate, was found. Fractographic analysis of the fatigue fracture surfaces by scanning electron microscopy confirmed that no so far known mechanism of fatigue failure was present. No slip bands were observed near fatigue fracture surfaces.

Keywords:

Materials science Stress intensity factor Fracture mechanics Paris' law Amorphous metal Scanning electron microscope Crack closure Metallurgy Composite material

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Metallic Glasses and Amorphous Alloys

Physical Sciences → Engineering → Mechanical Engineering

Surface Roughness and Optical Measurements

Physical Sciences → Engineering → Computational Mechanics

Textile materials and evaluations

Physical Sciences → Materials Science → Polymers and Plastics

Propagation of Fatigue Crack in Amorphous Fe<sub>40</sub>Ni<sub>40</sub>B<sub>20</sub> at High-Fequency Loading

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