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| CONSTITUTION OF ELASTIC Nb-BASE ALLOY Nb-40Ti-5.5Al |
| HUANG Tewei Central Iron and Steel Research Institute;Ministry of Metallurgical Industry;Beijing |
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Cite this article:
HUANG Tewei Central Iron and Steel Research Institute;Ministry of Metallurgical Industry;Beijing. CONSTITUTION OF ELASTIC Nb-BASE ALLOY Nb-40Ti-5.5Al. Acta Metall Sin, 1985, 21(4): 27-150.
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Abstract The constitution and its effect on properties of elastic Nb-base alloy Nb-40Ti-5.5Al were examined by means of metallography,electron microscopy,X-ray dif-fraction analysis of chemically extracted phases and electron diffraction of thinfoil.The results showed that the heat treating temperature dependence of consti-tution of the alloy indicated as follows:annealing at≤400℃ for 1 h after cold-rolled with 70% reduction,no marked change is revealed;heat treating between550—700℃ for 1 h,an age-hardening peak is noted;annealing at 1000℃ for 1h,the fully recrystallized solid solution is detected;further isothermal annealingat 650—750℃,the age-hardening and the precipitation of strengthening phase as(Nb,Ti)_3Al in the grains are obtained;and during isothermal aging at 650℃,thegrain boundary precipitation is characterized obviously.The internal stress in thealloy facilitates the phase precipitation.The post age-hardening tempering maycause the return phenomenon.
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Received: 18 April 1985
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2 黄特伟等,弹性铌合金的性能和应用,《航空测试技术》,1982,№.1 |
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