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Abstract <p>The texture, residual stresses, and phase composition in the friction stir welding (FSW) joints of a 1424 alloy ((wt %) Al–5Mg–2Li) sheets are investigated. Textures are determined using inverse pole figures, the residual stresses are measured by the sin<sup>2</sup>ψ method, and the content of the intermetallic phases S<sub>1</sub>&#xa0;(Al<sub>2</sub>MgLi) and δ' (Al<sub>3</sub>Li) across the FSW joint width is estimated using a unique technique based on the lattice parameter of the solid solution, which is corrected for residual stresses. The transition from the base metal zone to the stir zone is found to be accompanied by the following processes: rolling texture components are replaced by shear texture, compressive stresses relax, the amount of the δ' phase increases, and the amount of the S<sub>1</sub> phase decreases.</p>

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Texture, Residual Stresses, and Phase Composition of the Friction Stir Welding Joints of a 1424 Alloy (Al–Mg–Li System)

  • 期刊论文

  • 发表日期：

    2026年1月1日

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  • S. Ya. Betsofen,
  • V. V. Ovchinnikov,
  • A. V. Shalin,
  • A. A. Ashmarin,
  • E. V. Galkin,
  • D. A. Prokopenko,
  • E. I. Maksimenko

摘要

Abstract

The texture, residual stresses, and phase composition in the friction stir welding (FSW) joints of a 1424 alloy ((wt %) Al–5Mg–2Li) sheets are investigated. Textures are determined using inverse pole figures, the residual stresses are measured by the sin2ψ method, and the content of the intermetallic phases S1 (Al2MgLi) and δ' (Al3Li) across the FSW joint width is estimated using a unique technique based on the lattice parameter of the solid solution, which is corrected for residual stresses. The transition from the base metal zone to the stir zone is found to be accompanied by the following processes: rolling texture components are replaced by shear texture, compressive stresses relax, the amount of the δ' phase increases, and the amount of the S1 phase decreases.