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:
In this paper, the fatigue crack propagation (FCP) behaviors of the forged Mg-Zn-Y-Zralloy with different tempers were investigated. At the stage 1 of the FCP, the [removed info] K-da/dN curves weredistinguished from each other. However, at the stage 2 of the FCP, the [removed info] K-da/dN curves were almostthe same. SEM fracture analysis indicated that at the stage 2 of FCP, the fracture characteristics of theforged and T5 samples were similar, with many deep dimples on the fracture surfaces, whereas thefracture surfaces of the T4 and T6 samples were covered with lots of lamellar cleavage planes. SEMobservations also indicated that the microstructures were distinguished from each other. For theforged and T5 samples, many big bulk w-Mg3Y2Zn3 phases distributed in the Mg matrix. However,for the T4 and T6 samples, due to the solid solution treatment, w-Mg3Y2Zn3 phases were almostcompletely decomposed and many coarse rod-like [removed info] 1[removed info] precipitates appeared in the interior of thegrains. These firmly confirmed that the variation of the microstructures had great influence on thefatigue crack propagation (FCP) characteristics of the Mg-Zn-Y-Zr alloy
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.546-549.343.pdf
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