Tailor welded blanks (TWBs) are produced by welding blanks with different characteristics as such thickness and/or coating and/or material, etc. The forming characteristics of a TWB are different from typical sheets, as TWB is a combined blank each section has its own forming behavior. The current investigation aims to analyze the formability characteristics of TWBs made by joining AA6061 aluminum alloy sheets with different thicknesses. The sheets were joined by friction stir welding (FSW) and also by an improved FSW entitled friction stir vibration welding (FSVW) method at different welding speeds, rotational speeds, and tool tilt angles. The Taguchi method was used for the design of experiments and mean analysis was applied to find the optimum values of welding processes. ANOVA was applied to find the effect of the welding processes on formability. The formability of the TWBs has been assessed with the help of the limiting dome height (LDH) criterion. According to optical microscopy (OM) and electron backscatter diffraction (EBSD) analyses, grains in the stir zone of FSVW-ed blanks were smaller than those in FSW-ed blanks. It was shown that based on the Frank-Read dislocation mechanism, the density of dislocations increased as vibration used during FSW. From the results, it was concluded that the mechanical and formability behaviors of FSVW-ed blanks were higher than those of the FSW-ed blanks. It was also obtained that for the welding speed range studied in the current research, formability and mechanical behaviors of TWBs increased as welding speed increased.

裁缝焊接坯料 (TWB) 是通过焊接具有不同特性（例如厚度和/或涂层和/或材料等）的坯料制成的。 TWB 的成型特性与典型板材不同，因为 TWB 是组合坯料，每个部分都有其自己的形成行为。目前的研究旨在分析通过连接不同厚度的 AA6061 铝合金板制成的 TWB 的成形特性。板材通过搅拌摩擦焊 (FSW) 和改进的 FSW 连接，称为搅拌摩擦振动焊接 (FSVW) 方法，焊接速度、旋转速度和工具倾斜角不同。实验设计采用田口方法，均值分析用于寻找焊接工艺的最佳值。应用方差分析来发现焊接工艺对成形性的影响。TWB 的可成形性已经在限制圆顶高度 (LDH) 标准的帮助下进行了评估。根据光学显微镜 (OM) 和电子背散射衍射 (EBSD) 分析，FSVW 处理的坯料搅拌区中的晶粒比 FSW 处理的坯料小。结果表明，基于 Frank-Read 位错机制，位错密度随着 FSW 期间使用的振动而增加。结果表明，FSVW-ed 毛坯的机械和成形性能高于 FSW-ed 毛坯。还得出，对于当前研究中研究的焊接速度范围，TWBs 的成形性和机械性能随着焊接速度的增加而增加。TWB 的可成形性已经在限制圆顶高度 (LDH) 标准的帮助下进行了评估。根据光学显微镜 (OM) 和电子背散射衍射 (EBSD) 分析，FSVW 处理的坯料搅拌区中的晶粒比 FSW 处理的坯料小。结果表明，基于 Frank-Read 位错机制，位错密度随着 FSW 期间使用的振动而增加。结果表明，FSVW-ed 毛坯的机械和成形性能高于 FSW-ed 毛坯。还得出，对于当前研究中研究的焊接速度范围，TWBs 的成形性和机械性能随着焊接速度的增加而增加。TWB 的可成形性已经在限制圆顶高度 (LDH) 标准的帮助下进行了评估。根据光学显微镜 (OM) 和电子背散射衍射 (EBSD) 分析，FSVW 处理的坯料搅拌区中的晶粒比 FSW 处理的坯料小。结果表明，基于 Frank-Read 位错机制，位错密度随着 FSW 期间使用的振动而增加。结果表明，FSVW-ed 毛坯的机械和成形性能高于 FSW-ed 毛坯。还得出，对于当前研究中研究的焊接速度范围，TWBs 的成形性和机械性能随着焊接速度的增加而增加。根据光学显微镜 (OM) 和电子背散射衍射 (EBSD) 分析，FSVW 处理的坯料搅拌区中的晶粒比 FSW 处理的坯料小。结果表明，基于 Frank-Read 位错机制，位错密度随着 FSW 期间使用的振动而增加。结果表明，FSVW-ed 毛坯的机械和成形性能高于 FSW-ed 毛坯。还得出，对于当前研究中研究的焊接速度范围，TWBs 的成形性和机械性能随着焊接速度的增加而增加。根据光学显微镜 (OM) 和电子背散射衍射 (EBSD) 分析，FSVW 处理的坯料搅拌区中的晶粒比 FSW 处理的坯料小。结果表明，基于 Frank-Read 位错机制，位错密度随着 FSW 期间使用的振动而增加。结果表明，FSVW-ed 毛坯的机械和成形性能高于 FSW-ed 毛坯。还得出，对于当前研究中研究的焊接速度范围，TWBs 的成形性和机械性能随着焊接速度的增加而增加。结果表明，FSVW-ed 毛坯的机械和成形性能高于 FSW-ed 毛坯。还得出，对于当前研究中研究的焊接速度范围，TWBs 的成形性和机械性能随着焊接速度的增加而增加。结果表明，FSVW-ed 毛坯的机械和成形性能高于 FSW-ed 毛坯。还得出，对于当前研究中研究的焊接速度范围，TWBs 的成形性和机械性能随着焊接速度的增加而增加。