Friction Stir Processing: A New Grain Refinement Technique to Achieve High Strain Rate Superplasticity in Commercial Alloys

By Rajiv S. Mishra, M. Mahoney. 2001

277 citations recorded by the source corpus.

Friction stir processing is a new thermo-mechanical processing technique that leads to a microstructure amenable for high strain rate superplasticity in commercial aluminum alloys. Friction stirring produces a combination of very fine grain size and high grain boundary misorientation angles. Preliminary results on a 7075 Al demonstrate high strain rate superplasticity in the temperature range of 430-510 °C. For example, an elongation of >1000 % was observed at 490 °C and 1 × 10 -2 s -1 . This demonstrates a new possibility to economically obtain a superplastic microstructure in commercial aluminum alloys. Based on these results, a three-step manufacturing process to fabricate complex shaped components can be envisaged: cast sheet or hot-pressed powder metallurgy sheet + friction stir processing + superplastic forging or forming.

Subfields: Aerospace Engineering, Materials Chemistry, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/0861aaa3ee57d7f169abd658888ea2cd61dbc650

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In Materials Chemistry

1. Michael Reinbolt
2. Y. Gan
3. D. Solomon

In Mechanical Engineering

1. Michael Reinbolt
2. Y. Gan
3. D. Solomon

Citations in the corpus

• Friction Stir Processing of Particle Reinforced Composite Materials (2010, background): “In FSP soft metals without reinforcement particles such as aluminum alloys, though frictional heat is generated [100], no obvious tool consumption was created [101].”