Paper Title:
Grain Refinement of an Al-Cu-Mg Alloy by Microalloying and Common Thermo-Mechanical Treatment
  Abstract

Heavy deformation plus micro alloying could be an effective way to obtain ultrafine grain structure of metals. In the present work, an Al-Cu-Mg alloy was microalloyed with Zr to obtain homogeneous precipitates and then heavily deformed by conventional forging at high temperature. The possible refining processing routes were studied and the superplasticity behaviors of the alloy was investigated. Results show that the micro alloyed alloy can be stably refined to 3-5μm under conventional processing routes. The Al-3Zr precipitates act both as additional sites to enhance recrystallization nucleation rate and pins to impede grain growth to increase the thermal stability of the fine grain structure. However, as the Al3Zr precipitates remains along grain boundaries, the superplastic capability of the material is not high. At 430°C with 1×10-4S-1 strain rate, the elongation obtained was 260%.

  Info
Periodical
Materials Science Forum (Volumes 546-549)
Edited by
Yafang Han et al.
Pages
917-922
DOI
10.4028/www.scientific.net/MSF.546-549.917
Citation
B. L. Wu, G. Y. Sha, Y. N. Wang, Y. D. Zhang, C. Esling, "Grain Refinement of an Al-Cu-Mg Alloy by Microalloying and Common Thermo-Mechanical Treatment", Materials Science Forum, Vols. 546-549, pp. 917-922, 2007
Online since
May 2007
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$32.00
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