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首页> 外文会议>International conference on Frontiers of advanced materials and engineering technology >Investigation on Microstructure and Mechanical Property of the A7N01 Aluminum Alloy Welding Joint
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Investigation on Microstructure and Mechanical Property of the A7N01 Aluminum Alloy Welding Joint

机译：A7N01铝合金焊接接头的组织和力学性能研究

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The A7N01 aluminum alloy was welded by MIG welding in test,and the microstructure and mechanical property of joint were investigated.The results of experimentation show that the feature of the A7N01 aluminum alloy MIG welding joint is perfect with a gentle transition.The microstructure of fusion metal in A7N01 joint is as-cast grain.The microstructure of fusion zone consists of the fine columnar grains.It is rolling structure in the parent metal.In HAZ,the rolling structure is disappearing.The μ1′ (MgZn2) strengthening phases were precipitated in the grain boundary of the A7N01 aluminum alloy.The size ofη′ strengthening phase is about 5-10 nm.There is no precipitation phase in welding metal of A7N01 joint.The fine η′ transitional phases of the primeval parent metal are turned to the coarse η (MgZn2) stable phases of the HAZ.The size of η strengthening phase is about 50 nm.The tensile strength and the percentage elongation after fracture of A7N0l welding joint is below the parent metal.
机译：测试了A7N01铝合金的MIG焊接性能，研究了接头的显微组织和力学性能。实验结果表明，A7N01铝合金MIG焊接接头的特征是完美的，且过渡平缓。 A7N01接头中的金属为铸态晶粒。熔合区的微观结构由细的柱状晶粒组成。母金属中为滚动结构。在热影响区中，滚动结构消失。μ1'（MgZn2）强化相析出在A7N01铝合金的晶界处，η'强化相的尺寸约为5-10 nm。在A7N01接头的焊接金属中没有析出相，原始母金属的细η'过渡相转变为非晶态。 HAZ粗大的η（MgZn2）稳定相，η强化相的尺寸约为50 nm，A7N0l焊接接头断裂后的拉伸强度和断裂伸长率低于母体金属。

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