ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
In this present study, the fatigue behavior of titanium single crystals containing cracksgrowing in different crystallographic orientations has been investigated. To investigate fatiguefracture behavior of small single crystals, plain bending fatigue test method for thin sheet specimenwas developed. One end of the sheet specimen is fixed at a voice coil of the loudspeaker and theother end is set free. A bending mode resonance occurs in the specimen due to forced vibration atthe fixed end.In A-specimen, the notch plane and the direction are (11-20) and [1-100], respectively, the crackpropagated parallel to {1-100} plane and striation-like markings were observed on the fatiguesurfaces. In B-specimen with a notch of (1-100) and [11-20], the crack also propagated parallel to{1-100} plane as similar to A-specimen. These cracks are deduced to extend by alternating shear ontwo intersecting prismatic slip systems at the crack tip. In F-specimen with a notch of (0001) and[11-20], the crack propagated parallel to (0001) and twins were observed near the crack. As a result,S-N curves of each specimen showed strong orientation dependence and the fatigue strength ofF-specimen was the highest in these specimens
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.345-346.351.pdf
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