物理学报2012，Vol.61Issue(21)：350-356,7.
快速凝固Ti-Cu-Fe合金的相组成与组织演变规律
Phase constitution and microstructure evolution of rapidly solidified Ti-Cu-Fe alloy
摘要
Abstract
Ternary Ti61.2Cu32.5Fe6.3 quasiperitectic alloy is rapidly solidified in drop tube. The diameter of the obtained droplets varies from 80 to 1120 μm. The theoretical analysis indicates that the range of undercooling is from 34 to 293 K (0.23TL). Due to the influences of containerless, microgravity, ultrahigh vacuum, etc, the microstructure of solidified alloy is composed of Cu0.8Fe0.2Ti phase, CuTi2 phase and CuTi3 phase. This result deviates appreciably from the equilibrium state. CuTi3 phase exhibits a conspicuous solute trapping effect during rapid solidification. The microstructure of alloy consists chiefly of eutectic (Cu0.8Fe0.2Ti and CuTi2 phases) and dendrites (Cu0.8Fe0.2Ti, CuTi3) structure. With the increase of undercooling, the microstructure of eutectic experiences a transition from "strip eutectic cell to ellipsoidal eutectic cell to spherical eutectic cell"; the morphology of Cu0.8Fe0.2Ti dendrite experiences a transition from "coarse dendrites to broken dendrites to anomalous grain"; while the morphology of CuTi3 dendrite changes from small block to coarse dendrite.关键词
相组成/落管/快速凝固/组织演变Key words
phase constitution/drop tube/rapid solidification/microstructure evolution分类
矿业与冶金引用本文复制引用
鲁晓宇,廖霜,阮莹,代富平..快速凝固Ti-Cu-Fe合金的相组成与组织演变规律[J].物理学报,2012,61(21):350-356,7.基金项目
国家自然科学基金,(批准号： 51001087, 51171153),陕西省自然科学基础研究计划,(批准号： 2009JQ6002),教育部博士点基金,(批准号： 20106102120052)和西北工业大学基础研究基金,(批准号： JC201049, JC201157)资助的课题. （批准号： 51001087, 51171153）
