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:
The structure of Al-Li-Mg system alloy 1420, containing a small quantity of Sc, Zr, Tiwas investigated in cast, homogenized, hot-pressed, quenched and aged conditions, using themethods of optical metallography, transmission electron microscopy and X-ray examination. Anexistence of areas, having fine grains (20-30 nm)- "Ultrafine Grain areas"(UFGA) was observedin all the investigated conditions. UFGA are located on the boundaries, sub boundaries andS1(Al2MgLi) phase particles. UFGA can also form near the particles of crystallization origin.These areas have a complex phase composition. Inside the UFGA the particles of S1(Al2MgLi)phase and also δnon-phase, investigated in [1] are always present whereas δ'(Al3Li) precipitationsare absent. These areas are formed during crystallization and hot deformation. Their compositionchanges during the treatment. The nature of these changes is considered
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/13/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.519-521.265.pdf
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