摘要
92A0011 On an Unknown Precipitate Phase in2000 Series AI Alloys A new precipitate phase(X-phase)has been studied by means of TEM in2024-2324 aluminum alloys under different agingconditions.The X-phase is determined to have aC-face centered orthorhombic crystal structurewith a=0.492 nm,b=0.852 nm and c=0.701 nm.It is found that the X-phase forms on the helical
