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《冷却速率对Ti-5.8Al-3Mo-1Cr-2Sn-2Zr-1V-0.15Si合金组织及性能的影响》.pdf

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20 1 2010 10 Vol.20 Special 1 The Chinese Journal of Nonferrous Metals Oct. 2010 1004-0609(2010)S1-s0565-05 Ti-5.8Al-3Mo-1Cr-2Sn-2Zr-1V-0.15Si ( 110016) SEM TEM Ti-5.8Al-3Mo-1Cr-2Sn-2Zr-1V-0.15Si β β α α α α β ααβ TF 804.3 A Effect of cooling rate on microstructure and properties of Ti-5.8Al-3Mo-1Cr-2Sn-2Zr-1V-0.15Si alloy SONG Miao, MA Ying-jie, WU Jun, LI Yu-lan, LIU Yu-yin, LEI Jia-feng (Titanium Alloys Division, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China) Abstract: The effect of cooling rate after solution treatment on the microstructure and mechanical properties of Ti-5.8Al-3Mo-1Cr-2Sn-2Zr-1V-0.15Si alloy was studied by the OM, SEM and TEM. It is found that as the cooling rate decreases, the β stabilizers increase and the αstabilizers decrease in the β phase, thus the precipitation of second αphase becomes difficult during sequent aging, and the precipitated second α phase becomes small. At the same time, the lamellar of primary αbecomes coarse, and the amount of β phase decreases. The effect of cooling rate on the mechanical properties lies in the change of the amount and pattern of primary αphase, secondary αphase and βphase. Key words: titanium alloy; microstructure; cooling rate; tensile property 10.475.38β0.51 [1] (αβ) Ti-6Al-4V(β-ELI)Ti-6- 22-22S[2−3] (α+β) Ti-5.8Al-3Mo-1Cr-2Sn-2Zr-1V-0.1
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