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Article: Consolidation and Forging Methods for a Cryomilled Al Alloy
- Article from:
- Metallurgical and Materials Transactions
- Article date:
- September 1, 2008
- Author:
CopyrightCopyright Minerals, Metals & Materials Society Sep 2008. Provided by ProQuest LLC. (Hide copyright information)
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The method used to consolidate a cryogenically ball-milled powder is critical to the retention of superior strength along with acceptable tensile ductility in the bulk product. In this study, gasatomized Al 5083 powder was cryomilled, hot vacuum degassed, and consolidated by hot isostatic pressing (HIP) or by quasi-isostatic (QI) forging to produce low-porosity billets. The billets were then forged, either at high strain rate (without a die) or quasi-isostatically, and subsequently hot rolled to produce three 6.5-mm-thick plates. Despite extended periods at elevated temperatures and differences between the consolidation/deformation methods, a similar predominantly ultrafine grain ...