Ti600合金的性能与显微组织的研究

张振祺;罗国珍;洪权;杨冠军

航空材料学报 ›› 1999, Vol. 19 ›› Issue (4) : 6-10.

PDF(434 KB)
PDF(434 KB)
航空材料学报 ›› 1999, Vol. 19 ›› Issue (4) : 6-10.
论文

Ti600合金的性能与显微组织的研究

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Microstructures observation and mechanical properties test of near alpha titanium alloy Ti600

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摘要

Ti600合金是一种新型近α高温钛合金,其名义成分为Ti-6Al-2.8Sn-4Zr-0.5Mo-0.4Si-0.1Y(wt%).测试了该合金在热暴露前后拉伸性能和蠕变性能,并进行了透射电镜和光学显微镜观察.研究结果表明:合金的机械性能优异,与美国Ti1100性能水平相当;在常规热处理条件下,合金组织是一种典型的针状组织,该组织具有良好的抗蠕变性能.Ti600合金热暴露后,合金中存在的α2相(Ti3Al)和S2相(Ti5Si3)使合金的室温塑性降低.讨论稀土氧化物对合金显微组织及性能的影响,表明稀土的加入对改善合金蠕变性能有较大作用.

Abstract

Mechanical properties of the near alpha titanium alloy Ti600 with composition 6Al, 2.8Sn, 4Zr, 0.5Mo, 0.4Si, 0.1Y, bal.Ti, in wt%,were studied in different heat treatment conditions. The microstructures of the alloy were studied by LM, TEM.The resulting microstructure consists of small regions of aligned alpha platelets (colonies) and some grain boundary beta. After thermal exposure in air at temperature 600℃ for 100h., the precipitate α2 phase (Ti3Al) and silicides(Ti5Si3) decrease the ductility of the alloy.

关键词

Ti600钛合金 / 热暴露 / 显微组织 / 稀土氧化物

Key words

Ti600 titanium alloy / thermal exposure / microstructure / yttrium

引用本文

导出引用
张振祺, 罗国珍, 洪权, 杨冠军. Ti600合金的性能与显微组织的研究[J]. 航空材料学报, 1999, 19(4): 6-10
ZHANG Zhen-qi, LUO Guo-zhen, HONG Quan, YANG Guan-jun. Microstructures observation and mechanical properties test of near alpha titanium alloy Ti600[J]. Journal of Aeronautical Materials, 1999, 19(4): 6-10

参考文献

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基金

国家自然科学基金(59871042)
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