Microstructure and Mechanical Properties of Al-Mg-Sc-Zr Alloy Modified by Friction-Stir Processing-Reference-Cited by-同舟云学术

Microstructure and Mechanical Properties of Al-Mg-Sc-Zr Alloy Modified by Friction-Stir Processing

Published:2020-04-29 Issue:5 Volume:57 Page:321-336
ISSN:2195-8599
Container-title:Practical Metallography
language:en
Short-container-title:

Author:

Li M.¹,Zhou S.¹,Wang W.²,Liu F.²,Li H.²,Qin Y.¹³,Zhang Z.³,Wu Y.¹

Affiliation:

1. School of Materials Science and Engineering , Hefei University of Technology, Hefei 230009, China; e-mail: ,

2. Institute of Industry and Equipments , Hefei University of Technology, Hefei 230009 , China

3. Laboratories of Nonferrous Metal Material and Processing Engineering of Anhui Province , Hefei 230009 , China

Abstract

Abstract In this work, the effect of friction stir processing (FSP) on microstructure and mechanical properties of an Al-5Mg-0.2Sc-0.1Zr alloy was investigated in detail. The results showed that the as-cast alloy exhibited equiaxed grain structure with a large number of primary Al3(Sc,Zr) particles inside. FSP imposed a significant grain-refining effect on the alloy, changing the average grain size of 50.5 μm to 2.4 μm, which is attributed to the occurrence of dynamic recrystallization and generation of nanoscaled Al3(Sc,Zr) precipitates. These Al3(Sc,Zr) dispersoids intense impeded the movement of dislocation and grain boundaries and hindered the growth of recrystallized grains, resulting in a remarkable grain-refining strengthening, substructure strengthening and precipitation strengthening effect. On the other hand, the residual primary Al3(Sc,Zr) particles gave rise to a loss in ductility.

Publisher

Walter de Gruyter GmbH

Subject

Metals and Alloys,Mechanics of Materials,Condensed Matter Physics,Electronic, Optical and Magnetic Materials

Link

https://www.degruyter.com/document/doi/10.3139/147.110562/pdf

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