Interfacial characteristics and strengthening mechanisms of Al/steel extrinsic-riveting friction stir lap welding joint
<p>Replacing the steel with the Al alloy is an effective strategy for structural lightweight design and high-performance manufacturing. To enhance the mechanical properties of Al/steel dissimilar joint, a novel technique named extrinsic-riveting friction stir lap welding (ERFSLW) was proposed,...
محفوظ في:
| المؤلف الرئيسي: | |
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| مؤلفون آخرون: | , , , , , , |
| منشور في: |
2025
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| الموضوعات: | |
| الوسوم: |
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| الملخص: | <p>Replacing the steel with the Al alloy is an effective strategy for structural lightweight design and high-performance manufacturing. To enhance the mechanical properties of Al/steel dissimilar joint, a novel technique named extrinsic-riveting friction stir lap welding (ERFSLW) was proposed, which can combine the advantages of mechanical riveting and metallurgical bonding. SiC-reinforced Al matrix composite bars in the prefabricated holes were stirred and mixed with Al alloys, forming rivets that strengthened the mechanical riveting effect. The formation of a thin IMCs layer with a thickness of less than 2 μm, contributing to the metallurgical bonding. The tensile-shear strength of the joint was 215.33 N/mm. The joint fractured at the Al/steel interface and the Al/bar interface, showing the typical mixed fracture characteristic rather than the conventional brittle fracture, which exhibited a satisfactory ductility characterized by three steep drops.</p> |
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