Thermal stability of nanostructured titanium aluminides
作者： C. Suryanarayana , G.E. Korth , G.-H. Chen , A. Frefer , F.H. Froes
DOI: 10.1016/0965-9773(93)90170-G
关键词: Work (thermodynamics) 、 Thermal stability 、 Orthorhombic crystal system 、 Phase (matter) 、 Amorphous phase 、 Hot isostatic pressing 、 Nanostructured titanium 、 Metallurgy 、 Grain size 、 Materials science
摘要: Abstract Blended elemental Ti-24at.%Al-11at.%Nb and Ti-55at.%Al powders were mechanically alloyed to a B2/bcc an amorphous phase, respectively. The grain size of the was about 20 nm. Hot isostatic pressing these at 975°C resulted in fully dense compacts, transformed mixture orthorhombic phases while crystallized into Ti3Al TiAl phases. HIP ed compacts had average approximately 125 nm for phase 260 Ti-24at%Al-11at%Nb, 85 220 Ti-55at%Al. This work demonstrates that near-nanostructured grains are preserved alloys even after processing relatively high temperature.
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