Crystalline structure and morphology of X phase in Cu-Al-Ni-Mn-Ti alloy
来源期刊：中国有色金属学报(英文版)2000年第6期
论文作者：汪明朴 杨杰 李周 王艳辉 王志伟
文章页码：749 - 752
Key words：Cu-Al-Ni-Mn-Ti alloy;X phase; crystalline structure; morphology
Abstract: The composition, morphology, crystalline structure and formation and evolution of X phase in a Cu-12.3Al-2Ni-2Mn-1Ti alloy were studied. The results show that the X phase is a Ti-rich phase with atomic ratio of (Cu+Ni)∶ Ti∶Al=2∶1∶1 and DO3or L21structure; it is directly formed in the liquid phase by crystallization in the process of solidification of the alloy; there forms free particle X phase through the progressive dissolution and breakdown of the inter-dendritic microstructure in the following homogenization process. The X phase has three different morphologies, i.e.XL, XLSand XS, whose contents in the matrix rely on the heat-treatment conditions.
