Unusual ageing behaviour of friction-stir welded Al-Cu-Mg alloy

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:793

Article

Zuiko, Ivan S.¹  Mironov, Sergey¹  Kaibyshev, Rustam¹ 

[1] Belgorod Natl Res Univ, Pobeda 85, Belgorod 308015, Russia

关键词: Heat-treatable aluminium alloys;    Friction-stir welding;    Microstructure;    Second-phase particles;    Microstructure-strength relationship;   

DOI  :  10.1016/j.msea.2020.139882

来源: Elsevier

【 摘 要 】

The conventional peak-ageing treatment of friction-stir welded AA2519 resulted in precipitation of a stable theta-phase instead of the expected strengthening dispersoids of theta '' and theta' thus degrading material strength. This phenomenon was attributed to acceleration of the precipitation kinetics due to grain refinement and over-ageing effect associated with the weld thermal cycle.

【 授权许可】

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