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2219铝合金搅拌摩擦焊缝匙孔形缺陷修补技术

Aerospace Materials & Technology(2012)

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Abstract
采用固相填充+搅拌摩擦焊复合工艺进行了2219铝合金搅拌摩擦焊缝匙孔形缺陷的修补,焊后对接头的微观组织和力学性能进行了分析。结果显示:匙孔修补位置焊接接头焊核区呈现细小的等轴晶,热力影响区组织发生了较大程度的弯曲变形,接头抗拉强度≥335 MPa,延伸率≥8.0%,断裂机理为韧性断裂。
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Key words
Keyhole defect,Mechanical property,Microstructure,Solid-state filling+friction stir welding
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