Influence of deformation process on microstructure and properties of 2014 aluminium alloy

Abstract

The comparisons of forging-extrusion multistage hot deformation, forging and extrusion hot deformation processes on microstructure, mechanical property and impact toughness of 2014 Al alloy have been investigated. Results showed that the strength and impact toughness of the samples under forging-low extrusion multistage deformation process were significantly improved compared with that under forging deformation process due to the formation of smaller insoluble particles, finer grains and higher density of matrix precipitates. However, the strength and impact toughness of the samples under forging-extrusion multistage hot deformation process are lower than that under extrusion hot deformation process. The strengthening and fracture mechanisms with different deformation process have been discussed in detailed.

KEYWORDS:

• 2014 Al alloy
• multistage hot deformation process
• properties
• microstructure

Acknowledgments

The authors gratefully acknowledge the financial support from the Natural Science Foundation of Hunan Province of China (No. 2018JJ3645), State Key Laboratory of High Performance Complex Manufacturing of Central South University (No. ZZYJKT2017-02).

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

The authors gratefully acknowledge the financial support from the Natural Science Foundation of Hunan Province of China (No. 2018JJ3645), State Key Laboratory of High Performance Complex Manufacturing of Central South University (No. ZZYJKT2017-02).