Manufacturing large 2A14 aluminium alloy cylinders by a warm rolling technology

Abstract

This paper aims at the problem of high performance manufacturing of large 2A14 Al-alloy cylindrical components for aerospace applications. A warm rolling process was put forward to substantially refine the grains and secondary phases of 2A14 Al alloys. The results indicated that compared with hot rolling, warm rolling was easier to implement to form abundant subgrains and fully crushed the coarse particles. Coarse second phases dissolved and the precipitated T phases (AlCuMn) hindered the migration of grain boundaries and restrained grain growth during the heat treatment.The tensile strength, yield strength and elongation of the 2A14 aluminium alloy were significantly increased by 59 MPa (an increase of 14%), 71 MPa (an increase of 21%), 4% (an increase of 67%), respectively.

KEYWORDS:

• warm rolling
• grain refinement
• dislocations
• second phase particles
• grain boundaries
• mechanical properties
• large 2A14 Al-alloy cylinders
• high performance manufacturing

Acknowledgement

We would like to thank Editage (www.editage.cn) for English language editing.

Disclosure statement

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

Additional information

Funding

This study was funded by the National Natural Science Foundation of China [grant number 51875583], the Strategic Rocket Innovation Foundation [grant number Y18122], the Joint Funds of the National Natural Science Foundation of China [grant number U1637601], and the State Key Laboratory of High Performance Complex Manufacturing Foundation of China [grant number ZZYJKT2018-03].