This paper is a study of the mechanical properties and microstructures of the similar friction weld joints (TiAl6V4 and AA2024) using a servo-controlled Rotary Friction Welding (RFW) system. The friction welding operations were performed with seven different values of the friction pressure in the range of 2–14 MPa. The temperature is recorded during friction welding tests using k-type thermocouples. Tensile tests and microhardness measurements were carried out to obtain the mechanical properties of the friction weld joints. Microstructural changes of individual zone of the friction welds were investigated using an optical microscope (OM), and the fracture surfaces were observed using a scanning electron microscope (SEM). For AA2024, the fracture occurs most frequently in the central zone, resulting in lower tensile strength values, while for TiAl6V4, the fracture is occurs outside the friction weld interface, indicating that the friction weld joint is more resistant than the base metal. Microscopic analysis of the fracture surfaces of the AA2024 samples revealed diverse morphologies, with rough cupular surfaces predominating, indicating a dominant ductile fracture mode. Similarly, TiAl6V4's friction welded specimen also exhibited cupules of various sizes across its surface, primarily associated with a ductile fracture mode. Overall, the optimal friction pressure values (respectively 8 and 10 MPa for TiAl6V4 and AA2024) correspond to the highest values of the mechanical properties.

本文使用伺服控制旋转摩擦焊接 (RFW) 系统研究了类似摩擦焊接接头（TiAl6V4 和 AA2024）的机械性能和微观结构。摩擦焊接操作采用 2-14 MPa 范围内的七种不同的摩擦压力值进行。使用 k 型热电偶记录摩擦焊接测试期间的温度。进行拉伸试验和显微硬度测量以获得摩擦焊接接头的机械性能。使用光学显微镜（OM）研究摩擦焊缝各个区域的微观结构变化，并使用扫描电子显微镜（SEM）观察断口表面。对于AA2024，断裂最常发生在中心区域，导致抗拉强度值较低，而对于TiAl6V4，断裂发生在摩擦焊缝界面之外，表明摩擦焊缝比母材具有更高的抵抗力。对 AA2024 样品断裂表面的显微分析显示出不同的形态，其中以粗糙的杯状表面为主，表明主要是延性断裂模式。类似地，TiAl6V4 的摩擦焊接样品在其表面也呈现出各种尺寸的杯状结构，主要与延性断裂模式相关。总体而言，最佳摩擦压力值（TiAl6V4 和 AA2024 分别为 8 和 10 MPa）对应于机械性能的最高值。对 AA2024 样品断裂表面的显微分析显示出不同的形态，其中以粗糙的杯状表面为主，表明主要是延性断裂模式。类似地，TiAl6V4 的摩擦焊接样品在其表面也呈现出各种尺寸的杯状结构，主要与延性断裂模式相关。总体而言，最佳摩擦压力值（TiAl6V4 和 AA2024 分别为 8 和 10 MPa）对应于机械性能的最高值。对 AA2024 样品断裂表面的显微分析显示出不同的形态，其中以粗糙的杯状表面为主，表明主要是延性断裂模式。类似地，TiAl6V4 的摩擦焊接样品在其表面也呈现出各种尺寸的杯状结构，主要与延性断裂模式相关。总体而言，最佳摩擦压力值（TiAl6V4 和 AA2024 分别为 8 和 10 MPa）对应于机械性能的最高值。