Cryogenic properties of Al-Mg-Sc-Zr friction-stir welds

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

卷:598

Article

Zhemchuzhnikova, D.¹  Malopheyev, S.¹  Mironov, S.²  Kaibyshev, R.¹ 

[1] Belgorod State Univ, Lab Mech Properties Nanoscale Mat & Superalloys, Belgorod 308015, Russia

[2] Tohoku Univ, Grad Sch Engn, Dept Mat Proc, Sendai, Miyagi 9808579, Japan

关键词: Aluminum alloys;    Welding;    Grain refinement;    Mechanical characterization;    Fracture;   

DOI  :  10.1016/j.msea.2014.01.060

来源: Elsevier

【 摘 要 】

In this work, the effect of friction-stir welding (FSW) on the microstructure and cryogenic properties of an Al-Mg-Sc-Zr alloy was studied. The produced friction-stir joints demonstrated both excellent static and dynamic mechanical properties at cryogenic temperatures. The joint efficiency for the yield strength during transverse tensile tests was in the range of 95-100%, whereas the impacts fracture toughness in the stir zone was found to be superior compared with that in the base material. The high level of the mechanical properties was attributed to the preservation of Al-3(Sc,Zr) dispersoids, extensive grain refinement and the breaking of the continuous grain boundary network of the coarse Al6Mn particles during FSW. (C) 2014 Elsevier B.V. All rights reserved.

【 授权许可】

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