六角结构金属中特殊位错组态的分析

本文从稳定的位错组态的能量最低原理出发,分析了六角结构金属中能够出现的特殊位错组态,这些位错组态由两组分别位于间距很小的两个滑移面上的位错列阵组成,用透射电子显微镜观察时,它们呈现为有规则的位错“网络”。 关键词：

ANALYSIS OF THE SPECIAL STRUCTURES OF DISLOCATIONS IN HCP METALS

In this paper, we discuss the special structures of dislocations in h.c.p. metals. Two sets of dislocations that lay on two parallel non-basal slip planes will change their shape soasto become zigzag and form regular dislocation structures if the spacing of the slip planes is smaller than one quarter of the distance between the dislocations in the dislocation array. Under TEM observation, these structures appear to be regular dislocation networks that present double lines in one direction. Two of these dislocation networks in α-Ti were observed and others were shoAved schematically.