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Discrepancies in the Regression Modelling of Recrystallization Rate as Using the Data from Physical Simulation Tests

L.P. Karjalainen , M.C. Somani , S.F. Medina

金属学报(英文版)

The analysis of numerous experimental equations published in the literature reveals a wide scatter in the predictions for the static recrystallization kinetics of steels. The powers of the deformation variables, strain and strain rate, similarly as the power of the grain size vary in these equations. These differences are highlighted and the typical values are compared between torsion and compression tests. Potential errors in physical simulation testing are discussed.

关键词: physical simulation , null , null , null , null

装甲级Al?Zn?Mg合金搅拌摩擦焊接接头的力学性能

C.SHARMA , V.UPADHYAY , D.K.DWIVEDI , P.KUMAR

中国有色金属学报(英文版) doi:10.1016/S1003-6326(17)60056-6

研究焊接速度和旋转速度对装甲级铝合金搅拌摩擦焊接接头的形成和力学性能的影响.采用弯曲试验、显微硬度测试、力学性能测试、光学显微镜和扫描电子显微镜对焊接接头进行表征.焊接接头的力学性能(包括显微硬度、抗拉强度和伸长率)随旋转速度增加而增加,随焊接速度减小而增加.焊接速度对热影响区显微硬度的影响比旋转速度更强.焊接速度和旋转速度对搅拌摩擦焊接接头的力学性能有重要影响,且其影响可用回归模型进行预测.

关键词: 搅拌摩擦焊 , 焊接参数 , 力学性能 , 断裂形貌 , 回归模型

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