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以2219铝合金为对象,对其焊接接头的力学性能和裂纹的扩展行为进行研究。结果表明,焊缝处各区域的抗裂纹扩展能力基本一致,由于焊缝处组织以及力学性能具有不均匀性,所以裂纹的扩展方向不确定。
Taking 2219 aluminum alloy as an example, the mechanical properties of the welded joints and the crack propagation behavior were investigated. The results show that the crack propagation resistance in each area of the weld is basically the same. Because of the non-uniform microstructure and mechanical properties of the weld, the crack propagation direction is indefinite.