Structure and properties of welding joints of 1370 aluminum alloy obtained by electron-beam welding

The paper focuses on the structure and properties of welding joints of the high-strength 1370 aluminum alloy obtained by electron-beam welding (EBW). This issue is relevant to the housing assembly technique of space vehicle gyroscope sensors. The heat-affected zone geometry produced by the electron beam, is studied herein as well as the welding joint structure, depending on welding parameters. EBW of the 1370 aluminum alloy has a positive effect on the strength properties of the welding joint. The energy dose per unit length of the joint must be correct. Insufficient energy dose leads to lack of welding penetration and low joint strength, whereas its excess provides the liquid metal evaporation and the formation of pores and cracks. Feasibility is demonstrated for welding the aluminum alloy at a higher speed.