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7A52 Al alloy plate aged at 105 °C for 8 h and then at 130 °C for 24 h was welded by means of TIG using Al-6.3Mg-0.35Sc-0.1Zr-0.1Cr solder wire. Mechanical properties and microstructures of welded joint were studied. There are two obviously soft areas in the welded joint, welding seam and over-aging zone. The mechanical properties of welded joint are that σ b is 358 MPa, σ 0.2 is 238...
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