Acta Metallurgica Sinica (English Letters) ›› 1990, Vol. 3 ›› Issue (4): 256-261.

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SLIP SYSTEMS AND DISLOCATION DISTRIBUTION IN α-PHASE OF SUPERPLASTICALLY DEFORMED Ti-6AI-4V ALLOY

ZHAO Linruo ZHANG Shaoqing YAN Minggao Institute of Aeronautical Materials,Beijing,China Lab.No.4,Beijing Institute of Aeronautical Materials,Beijing 100095,China   

  • 收稿日期:1990-08-25 修回日期:1990-08-25 出版日期:1990-08-25 发布日期:2009-10-10

SLIP SYSTEMS AND DISLOCATION DISTRIBUTION IN α-PHASE OF SUPERPLASTICALLY DEFORMED Ti-6AI-4V ALLOY

ZHAO Linruo ZHANG Shaoqing YAN Minggao Institute of Aeronautical Materials,Beijing,China Lab.No.4,Beijing Institute of Aeronautical Materials,Beijing 100095,China   

  • Received:1990-08-25 Revised:1990-08-25 Online:1990-08-25 Published:2009-10-10

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摘要： <正> The activated slip systems in the α-phase of the superplastically deformed Ti-6Al-4V alloywere analyzed by systematic operation method with TEM.The results show that thedominately activated slip systems in the α-phase are{01(?)0}〈2(?)0〉and{01(?)}2(?)0〉,The{0001}〈2(?)0〉system as well as the c+a dislocalions of b=[1/3]〈11(?)3〉will be acti-vated when the deformation temperature is lowered.Large amounts of TEM observations in-dicate that the dislocations in the α-phase were mainly activated near the triple grain bounda-ry junctions,α/αgrain boundaries and α/βinterlaces.

Abstract: The activated slip systems in the α-phase of the superplastically deformed Ti-6Al-4V alloy were analyzed by systematic operation method with TEM.The results show that the dominately activated slip systems in the α-phase are{01(?)0}〈2(?)0〉and{01(?)}2(?)0〉, The{0001}〈2(?)0〉system as well as the c+a dislocalions of b=[1/3]〈11(?)3〉will be acti- vated when the deformation temperature is lowered.Large amounts of TEM observations in- dicate that the dislocations in the α-phase were mainly activated near the triple grain bounda- ry junctions,α/α grain boundaries and α/β interlaces.

Key words: titanium alloy, superplastic deformation, dislocation