Microstructural Evolution of Ti-5.6Al-4.8Sn-2Zr-1Mo-0.35Si-0.7Nd Titanium Alloy with Carbon Additions

作     者：Shangzhou ZHANG Yuan GAO Ziquan LIU Yuyin LIU Rui YANG 

作者机构：School of Environment and Materials Engineering Yantai University Yantai 264005 China Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2006年第22卷第5期

页      面：616-620页

核心收录：

学科分类：080503[工学-材料加工工程] 0817[工学-化学工程与技术] 0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 080201[工学-机械制造及其自动化] 

主　　题：Titanium alloy Carbon Microstructure Heat treatment Carbide 

摘      要：The effect of carbon addition on microstructural evolution was studied in a near-α titanium alloy （Ti-5.6Al- 4.8Sn-2Zr-1Mo-0.35Si-0.7Nd）. It was found that flake and ribbon titanium carbides with a NaCl crystal structure formed in the as-cast alloys with carbon additions of over 0.17 wt pct. Flake carbide particles are the product of eutectic transformation and precipitate from the high-temperature β phase. The ribbon carbide particles are primary phases formed prior to the nucleation of any metallic phases. The as-cast alloys with carbide precipitation after heat-treatment at βt-30℃ followed by water quenching showed the spheroidization of α lamellae and partial dissolution of carbide particles. After annealing at βt＋15℃, carbide particles are mostly distributed at the grain boundary and spheroidized through mixed grain boundary plus bulk diffusions.