ISSN:
1662-9752
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:
Effect of Ni/Cu multilayer coating on fatigue durability was investigated. The Ni/Cumultilayered films were coated on cylindrical copper specimens by electroplating technique.Thickness of individual component layers was h=20nm and 100nm and the total thickness was 5μm.The specimens with a conventional nickel coating and uncoated specimens were also prepared.Push-pull fatigue tests were carried out in air at room temperature. It was found that the specimenswith the Ni/Cu multilayered coatings exhibited the fatigue lives longer than those of the conventionalnickel coating. In particular, the fatigue life with the h=100nm multilayer was at least ten times longerthan that with the nickel coating at the stress amplitude of 90MPa. From the electron channellingcontrast imaging (ECCI) observation of subsurface areas of the copper specimens, dislocationstructures peculiar to fatigue deformation was suppressed by the surface coatings
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.561-565.2393.pdf
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