کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1616747 | 1005668 | 2011 | 5 صفحه PDF | دانلود رایگان |
Severe plastic deformation (mechanical activation in a hydrogen atmosphere and shear under pressure) effects on the hydrogenation of two titanium aluminides Ti3Al and TiAl-type alloy (B2) have been studied. It is shown that a conventional hydrogenation of the bulk samples allows forming the hydrides with high hydrogen content and high desorption temperature: TiAl (773 K, 1.76 mass%) and Ti3Al (1043 K, 2.94 mass%). In comparison with the conventional hydrogenation, the mechanical activation in a hydrogen atmosphere at room temperature allows one to obtain the hydrides of the TiAl (B2) and Ti3Al alloys with the reduced desorption temperature: TiAl (453 K, 1.96 mass%) and Ti3Al (531 K, 2.6 mass%). The shear under pressure has been applied to the sample before hydrogenation also leads to a reduction of the desorption temperature; however, it produces the phase transformation in the Ti3Al intermetallic compounds, which lowers the observed a maximum hydrogen content.
► The mechanical activation in a hydrogen atmosphere and the preliminary severe plastic deformation by the shear under pressure allow one to obtain the hydrides of the TiAl and Ti3Al alloys with a reduced desorption temperature.
Journal: Journal of Alloys and Compounds - Volume 509, Issue 38, 22 September 2011, Pages 9307–9311