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:
High resolution transmission electron microscopy(HRTEM)observation was performedto clarify morphology of precipitates at early stage of aging in Mg-Gd-Zr alloy. In the specimenaged at 423K, monolayer was observed on {1100}Mg planes. With increasing aging time, themonolayer and β” phase grew along the 〈1120〉Mg directions. Arrangement of bright dotscorresponding to {020}β’ except for the monolayer and β” phase was observed before peak agingstage. β’ phases formed at the same aging stage. Thus, these precipitates co-existed before peakaging stage. The monolayer, β” phase and β’ phase still co-existed in the peak aged specimen.The β’ phase was dominated in the peak hardness. It is revealed that the monolayer lying on{1100}Mg act as precursor of β” phase and β’ phase
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/17/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.561-565.303.pdf
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