Abstract Experimental data from friction stir welded Al 7075 and HSLA-65 were used to create dimensionless, empirical models relating critical weld parameters to the peak temperature rise and cooling rate of the weld heat-affected zone. Five different backing plate materials and a wide range of travel speeds and weld powers were used in the experimental design to ensure the models are relevant to a broad range of welding parameters. The resulting models have R-squared values of 0.997 and 0.995 for the dimensionless peak temperature rise and cooling rate correlations, respectively. Demonstrations of the models’ practical applications are provided. Herein is shown how the models can identify welding parameter (i.e. travel speed or power) levels needed to produce a desired weld peak temperature rise or cooling rate. Also demonstrated is how the models can be used to explore the relative effects of travel speed and backing plate thermal diffusivity on weld peak temperature rise and cooling rate.

中文翻译：

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搅拌摩擦焊焊接参数对峰值温度和冷却速率影响的无量纲建模

摘要 来自搅拌摩擦焊 Al 7075 和 HSLA-65 的实验数据用于创建无量纲的经验模型，将关键焊接参数与焊接热影响区的峰值温升和冷却速率相关联。实验设计中使用了五种不同的背板材料和广泛的行进速度和焊接功率，以确保模型与广泛的焊接参数相关。对于无量纲峰值温升和冷却速率相关性，所得模型的 R 平方值分别为 0.997 和 0.995。提供了模型实际应用的演示。这里显示了模型如何识别产生所需焊接峰值温升或冷却速率所需的焊接参数（即行进速度或功率）水平。