Superplastic Behavior of Friction Stir Processed Aluminum-lithium Alloy

Abstract

Friction stir processing (FSP) is currently being developed as a grain refinement tool for several commercial aluminum alloys. The fine grain size in the nugget region leads to superplasticity. However, the optimum strain rate and overall ductility depends on the alloy composition. In this paper, the superplastic behavior of FSP Al-Li-Cu alloy (AF/C458-T3) is reported. The nugget region of the FSP alloy showed equiaxed grains of 15-16 μm. Maximum ductility of ∼320% was observed at 500 °C and strain rate of 10-3 s-1. Present results show the potential of FSP to achieve superplasticity in a single step as compared to conventional multi-step thermomechanical processing.

Department(s)

Materials Science and Engineering

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 Wiley, All rights reserved.

Publication Date

01 Dec 2001

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