Microstructure, texture and mechanical properties of electrically assisted friction stir welding (EFSW) of Ti6Al4 V alloy were investigated. The base material (BM) and the heat-affected zone (HAZ) have a coarse equiaxed structure, and the fine equiaxed structure was observed in the stir zone (SZ). The boundary between the SZ and the HAZ changed abruptly from the FSW joint to the EFSW joint to make it smooth. The BM and the HAZ have a strong prismatic texture {10 0} and the texture of the SZ is randomly distributed. Hardness of the joints was explained by grain size, loss rate of elemental Al and dislocation density, as well as the advantages of the EFSW process in terms of improving mechanical properties as influenced by microstructure and texture.

中文翻译：

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电辅助搅拌摩擦焊钛合金的显微组织和织构研究

研究了 Ti6Al4V 合金电辅助搅拌摩擦焊 (EFSW) 的显微组织、织构和机械性能。母材（BM）和热影响区（HAZ）具有粗大的等轴结构，在搅拌区（SZ）观察到细小的等轴结构。SZ 和 HAZ 之间的边界从 FSW 接头突然变为 EFSW 接头，使其变得平滑。BM 和 HAZ 具有强烈的棱柱形纹理 {10 0}，SZ 的纹理随机分布。接头的硬度可以通过晶粒尺寸、元素铝的损失率和位错密度以及 EFSW 工艺在改善机械性能方面的优势来解释，受微观结构和织构的影响。