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:
Recent interest in bulk-metallic glasses (BMGs) has led to the development of amorphous alloysdesigned for structural applications in various fields as aircraft frames, rotating equipment,automobiles, and medical implants. Although the mechanical behavior of BMGs is being studiedextensively, little attention has been paid to their fatigue behavior. Moreover, early fatiguecharacteristics have exhibited contradictory results. In the current research, uniaxial tension-tensionfatigue experiments were performed on notched Zr52.5Cu17.9Al10Ni14.6Ti5 button-head fatiguespecimens with various surface finishes. The fatigue studies were designed to better understand theinfluence of the average surface roughness and/or critical surface defects on the fatigue behavior ofglassy alloys. It was hypothesized that geometric surface flaws would lower the observed life of aBMG sample by shortening the crack initiation phase and providing local stress concentrators. Thecurrent studies of surface conditions indicate that fatigue-endurance limits are greatly impacted bythe average surface roughness with possible reductions of greater than fifty percent
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.345-346.217.pdf
Permalink