Increasing the reliability of welded joints in high-strength V-1461 aluminium–lithium alloy

Abstract

Filler materials for welding V-1461 alloy, ensuring high cracking resistance, corrosion resistance and mechanical properties, are selected. The results of tests of the welded joints in static tensile loading and bending and the impact toughness of the weld metal and low-cycle fatigue strength are presented. The experimental results show that the application of impact ultrasound treatment increases by an order of magnitude the values of low-cycle fatigue resistance of the welded joints as a result of the formation of the nanostructured surface layers. The level of residual stresses in welded joints is determined.

Keywords:

• aluminium alloy
• alloying system
• argon-arc welding
• percussion ultrasonic machining
• mechanical properties
• low-cycle fatigue
• weldability

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Errata

Notes

^1. The technology of ultrasound surface treatment (UST) was developed at the Institute of Physics and Strength of Materials, Siberian Division of the Russian Academy of Sciences.