Sie befinden Sich nicht im Netzwerk der Universität Paderborn. Der Zugriff auf elektronische Ressourcen ist gegebenenfalls nur via VPN oder Shibboleth (DFN-AAI) möglich. mehr Informationen...
Investigation of normal recrystallization and abnormal recrystallization in pure tungsten sheet by EBSD
Ist Teil von
International journal of refractory metals & hard materials, 2015-09, Vol.52, p.98-103
Ort / Verlag
Elsevier Ltd
Erscheinungsjahr
2015
Link zum Volltext
Quelle
Elsevier ScienceDirect Journals Complete
Beschreibungen/Notizen
Normal recrystallization and abnormal recrystallization induced by Ni in pure tungsten (W) sheet were studied by EBSD. It was demonstrated that (001)[11¯0] and (111)[11¯0] textures in the deformed W sheet remain after normal recrystallization, but with lower densities. In addition, (001)[01¯0] and (111)[1¯1¯2] textures arise after recrystallization, which can be explained on the subgrain coarsening recrystallization mechanism. During the abnormal recrystallization of W sheets, grain boundary phase change occurred first between Ni and W, which leads to the formation of liquid-like films on grain boundaries. The occurrence of grain boundary phase change depends mainly on the grain boundary misorientation angle. Grain boundaries with liquid-like film will migrate under the driving force of eliminating deformation storage energy, which gives rise to abnormal recrystallization in W sheets. After abnormal recrystallization, (001)[11¯0] and (111)[11¯0] textures disappeared, leaving only weak texture near (001)[01¯0].
Figure (a) and (b) is the φ2=45° ODF section of W sheet after normal recrystallization and abnormal recrystallization, respectively. It can be seen that not only the texture density but also the texture components are different in the two recrystallized W sheets. [Display omitted]