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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Severe plastic deformation and hydrogenation of the titanium aluminides
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Severe plastic deformation and hydrogenation of the titanium aluminides

机译：钛铝化物的严重塑性变形和氢化

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摘要

Severe plastic deformation (mechanical activation in a hydrogen atmosphere and shear under pressure) effects on the hydrogenation of two titanium aluminides Ti_3Al and TiAl-type alloy (B_2) 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, 1.76mass%) and Ti_3Al (1043 K, 2.94mass%). 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 (B_2) and Ti_3Al alloys with the reduced desorption temperature: TiAl (453 K, 1.96mass%) and Ti_3Al (531 K, 2.6mass%). 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 Ti_3Al intermetallic compounds, which lowers the observed a maximum hydrogen content.
机译：研究了两种钛铝化物Ti_3Al和TiAl型合金（B_2）的严重塑性变形（氢气氛中的机械活化和压力剪切）的影响。结果表明，对大块样品进行常规加氢可以形成具有高氢含量和高解吸温度的氢化物：TiAl（773 K，1.76质量％）和Ti_3Al（1043 K，2.94质量％）。与常规氢化相比，室温下在氢气氛中的机械活化使人们能够以降低的解吸温度获得TiAl（B_2）和Ti_3Al合金的氢化物：TiAl（453 K，1.96mass％）和Ti_3Al（ 531 K，2.6质量％）。在加氢之前，已经在样品上施加了压力剪切，这也导致了解吸温度的降低。但是，它会在Ti_3Al金属间化合物中产生相变，从而降低所观察到的最大氢含量。

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