The submerged friction stir processing (SFSP) technique was employed on the prior friction stir welded (FSW) AA6082/AA8011 dissimilar aluminum alloy joints. The tap water with room temperature was kept at 40 mm depth throughout the processing. The AA6082 was kept at the advancing side during FSW and SFSP process and this was done to enhance the strength of the joint. The SFSP joints were studied comparatively with the FSW joints. The sampling position was also studied for both the FSW joint and SFSP joint. The employment of the submerged friction stir processing resulted in the microstructural grain size refinement. The tensile strength of the SFSP joint was found to be higher than that of AA8011 base metal but lower than that of AA6082 base metal. The tensile strength of the FSW joint was found to be lower than that of both base metals. There was a clear correlation between the tensile properties and the grain size refinement. The SFSP joint exhibited good microhardness propert...

中文翻译：

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淹没式摩擦搅拌工艺对搅拌摩擦焊接异种接头的影响

在先前的搅拌摩擦焊接（FSW）AA6082 / AA8011异种铝合金接头上采用了浸没搅拌摩擦加工（SFSP）技术。在整个过程中，室温的自来水保持在40毫米的深度。在FSW和SFSP过程中，AA6082保持在前进侧，这样做是为了增强接头的强度。SFSP接头与FSW接头进行了比较研究。还研究了FSW接头和SFSP接头的采样位置。浸没式搅拌摩擦加工的应用导致了微结构晶粒尺寸的细化。发现SFSP接头的抗拉强度高于AA8011贱金属，但低于AA6082贱金属。发现FSW接头的抗拉强度低于两种贱金属的抗拉强度。拉伸性能与晶粒细化之间存在明显的相关性。SFSP接头表现出良好的显微硬度。