Strength and ductility improvement of ultrafine-grained tungsten produced by equal-channel angular pressing
作者： T. Hao , Z.Q. Fan , T. Zhang , G.N. Luo , X.P. Wang
DOI: 10.1016/J.JNUCMAT.2014.08.044
关键词: Transition temperature 、 Ductility 、 Pressing 、 Tungsten 、 Grain size 、 Materials science 、 Metallurgy
摘要: Abstract In this study, equal-channel angular pressing (ECAP) was employed to refine the grain size of tungsten at relatively low temperatures. The small punch (SP) test results show that ultrafine-grained appears an evident improvement in both strength and ductility compared with primary coarse-grained tungsten. analysis from SP data indicate ductile-to-brittle transition temperature (DBTT) decrease 386 °C 322 °C due ECAP processing 800 °C 950 °C, respectively. reason produced by is discussed.
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