Zr含量对Ti-1100合金中硅化物析出的影响  

EFFECT OF ZIRCONIUM CONTENT ON PRECIPITATION OF SILICIDE IN Ti-1100 ALLOY

作　　者：徐锋[1] 李阁平[1] 杨锐[1] M.Varlioglu P.Nash 

机构地区：[1]中国科学院金属研究所,沈阳110016 [2]Illinois Institute of Technology Thermal Processing Technology Center,Chicago,IL,USA

出　　处：《金属学报》2006年第7期770-776,共7页Acta Metallurgica Sinica

摘　　要：通过TEM观察了不同Zr含量Ti-1100合金中硅化物的析出形貌及分布规律．由实验结果、Ti-Zr-Si三元相图和相关文献推测了基于Ti-1100合金成分的赝Ti-Zr-Si三元相图Si含量为0．76％(原子分数)的变温截面．通过TEM观察结果和相图分析显示,随着Zr含量的增加, Ti-1100合金中硅化物溶解温度升高,同时合金中Si元素的溶解度降低．这些变化导致合金析出硅化物的整体尺寸增大、体积分数增加,硅化物的析出位置也由以β相为主变成以α相为主．Morphology and distribution of silicide in Ti-1100 alloy with different zirconium content were observed by TEM. Isopleth at 0.76% （atomic fraction） Si in the Ti-Zr-Si system for pseudo Ti-1100 alloy was deduced according to the TEM results, isothermal sections of Ti-Zr-Si system phase diagram and concerned references. Both the TEM observation and the isopleths show that the silicide solvus increases and solubility of silicon in titanium declines as Zr content increased. These changes resulted in silicide coarsening, silicide volume fraction increasing and precipitation position changing.

关 键 词：钛合金 ZR含量 硅化物 相图 

分 类 号：TG113.12[金属学及工艺—物理冶金] TG146.2[金属学及工艺—金属学]