Enhanced tensile ductility in Al-Mg alloys by solid-solution interactions

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The development of methods for obtaining high tensile elongation in aluminum alloys is of great importance for the practical forming of near-net-shape parts. Current superplastic alloys are limited in use by high material costs. The utilization of solute-drag creep processes, the approach used in this study, to obtain enhanced tensile ductility in aluminum alloys has lead to tensile elongations of up to 325% in simple, binary Al-Mg alloys with coarse grain sizes. This method has the advantage of lowering processing costs in comparison with superplastic alloys because a fine grain size is not necessary. Whereas superplastic alloys typically have a ... continued below

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11 p.

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Taleff, E.M.; Henshall, G.A.; Lesuer, D.R.; Nieh, T.G. & Wadsworth, J. November 29, 1995.

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Description

The development of methods for obtaining high tensile elongation in aluminum alloys is of great importance for the practical forming of near-net-shape parts. Current superplastic alloys are limited in use by high material costs. The utilization of solute-drag creep processes, the approach used in this study, to obtain enhanced tensile ductility in aluminum alloys has lead to tensile elongations of up to 325% in simple, binary Al-Mg alloys with coarse grain sizes. This method has the advantage of lowering processing costs in comparison with superplastic alloys because a fine grain size is not necessary. Whereas superplastic alloys typically have a strain-rate sensitivity of m = 0.5, the enhanced ductility Al-Mg alloys typically exhibit m = 0.3 where maximum ductility is observed. Although a strain-rate sensitivity of rn = 0.5 can lead to elongations of over 1000% (superplastic materials) a value of m = 0.3 is shown experimentally to be sufficient for obtaining elongations of 150% to a maximum observed of 325%. Enhanced ductility is also affected strongly by ternary alloying additions, such as Mn, for which a preliminary understanding is pursued.

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11 p.

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OSTI as DE96005784

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  • Materials Week `95, Cleveland, OH (United States), 29 Oct - 2 Nov 1995

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  • Other: DE96005784
  • Report No.: UCRL-JC--122988
  • Report No.: CONF-951026--11
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/201796 | External Link
  • Office of Scientific & Technical Information Report Number: 205212
  • Archival Resource Key: ark:/67531/metadc668141

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • November 29, 1995

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  • June 29, 2015, 9:42 p.m.

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  • Feb. 23, 2016, 6:43 p.m.

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Taleff, E.M.; Henshall, G.A.; Lesuer, D.R.; Nieh, T.G. & Wadsworth, J. Enhanced tensile ductility in Al-Mg alloys by solid-solution interactions, article, November 29, 1995; California. (digital.library.unt.edu/ark:/67531/metadc668141/: accessed December 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.