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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 9    No. 1    March 1999

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GRAIN BOUNDARY CHARACTER DISTRIBUTION, TEXTURE AND SUPERPLASTIC DEFORMATION  BEHAVIOR OF AN Al-Li ALLOY①
Zhang Baojin, Zeng Meiguang, Niu Xuejun and Ge Shaoping

College of Sciences, Northeastern University, Shenyang110006, P. R. China

Abstract:The grain boundary character distribution and the texture of 2091 Al-Li alloy recrystallized at different temperatures were measured by TEM and X-ray techniques respectively. The occurrence frequency of low-energy boundaries decreases with increasing recrystallization temperature, while the frequency of highenergy boundaries increases. The strongest component of recrystallization texture in the test temperature range is {011}〈111〉. The relative intensity of the texture tends to decrease with increasing recrystallization temperature. The material which contains a high frequency of low-energy boundaries exhibits lower deforming stress and high elongation.

 

Key words: aluminum-lithium alloy grain boundary character distribution recrystallization texture  Superplasticity

ISSN 1672-7029
CN 43-1423/U

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