Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 595, Issue -, Pages 10-17Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2013.12.004
Keywords
Al-Mn-Mg-RE alloy; Ti addition; Constitutive behavior; Microstructural characterization; Hot workability
Categories
Funding
- Program of International Science and Technology Cooperation [2010DFB70180]
- National Basic Research (973) Program of China [2009CB623704]
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The hot deformation characters of two Al-Mn-Mg-RE alloys (without and with Ti addition, respectively) were studied by hot compression tests, and the deformed microstructures were observed by optical microscopy and transmission electron microscopy, respectively. The results show that the flow stress, hot deformation activation energy and stress exponent were higher with the addition of Ti during hot deformation. Less indistinct subgrain boundaries were also obtained with addition of Ti. The main enriched rare earth constituent particles could make positive purifying effects on impurity elements of Fe and Si in the Al-Mn-Mg-RE alloy. While the addition of Ti not only promoted the formation of a more stable Ti-2 Al-20 (Ce-x, La1-x) phase, but also resulted in more refined and dispersive constituent particles, which could improve the hot workability of the alloy. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.
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