A MICROSTRUCTURAL ANALYSIS OF 7050 Al ALLOY

Abstract

Abstract: The microstructure of 7050 AI alloy in T74 condition has been studied by means of transmis- sion electron microscopy and dynamical diffraction simulation.It was found that the alloy studied contains mainly AI3Zr superlattice phase,η′-phase and Al_7Cu_2Fe constituent phase. The η′-phase has an orthorombic crystal structure with a=0.492 nm,b=0.852 nm and c=0.701 nm.The orientation relationship between the η′-phase and matrix was determined as(101)_m∥(010)_(η′)[111]_m∥[001]_(η′)

Key words: 7050 Al alloy, microstructure, TEM, dynamical diffraction simulation

JIN Yan LI Chunzhi ZHAO Yingtao YAN Minggao Beijing Institute of Aeronautical Materials.Beijing,China. A MICROSTRUCTURAL ANALYSIS OF 7050 Al ALLOY[J]. Acta Metallurgica Sinica (English Letters), 1992, 5(2): 69-75.

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A MICROSTRUCTURAL ANALYSIS OF 7050 Al ALLOY

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