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 research works on bulk-metallic glasses (BMGs) have opened a window to create a newgeneration of structural materials for applications. Although the mechanical behavior of BMGs isbeing studied widely, the fatigue characteristics are poorly understood. The uniaxial tension-tensionhigh-cycle fatigue (HCF) studies were performed on zirconium (Zr)-based bulk-metallic glasses(BMGs): Zr50Cu40Al10, Zr50Cu30Al10Ni10, Zr50Cu37Al10Pd3, and Zr41.2Cu12.5Ni10Ti13.8Be22.5, inatomic percent. The HCF experiments were conducted using an electrohydraulic machine at afrequency of 10 Hz with a R ratio of 0.1, where R = σmin./σmax., where σmin. and σmax. are the appliedminimum and maximum stresses, respectively. The fatigue-endurance limit of Zr50Cu37Al10Pd3 wassignificantly greater than those of Zr50Cu40Al10, Zr50Cu30Al10Ni10, and Zr41.2Ti13.8Cu12.5Ni10Be22.5. Inorder to compare the fatigue property with the crystalline alloys, the same HCF experiments werealso performed on Ti-6-4, drill tool steel, and Al 7075. The fatigue lifetime of Zr-based BMGs isgenerally comparable to those of Ti-6-4 and drill-tool-steel crystalline alloys and is greater than thatof Al 7075 alloy. The fracture morphology of BMGs indicates that fatigue-crack-propagationregion included the distinct rough striations and the fine striations. The possible mechanism for thestriation formation was proposed
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.378-379.329.pdf
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