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Grain boundary precipitation in aluminum alloys: Effect of boundary structure

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Abstract

A transmission electron microscope study of grain boundary precipitation in Al-Zn and Al-Zn-Mg alloys has been conducted with emphasis on the influence of localized boundary structure. Intrinsic grain boundary defects are found to have a significant effect on the precipitation sequence in that they assist the emerging precipitates in establishing a low energy habit plane relationship with at least one bordering grain. Under more extreme conditions of unavailable habits or unfavorable intrinsic structures, extrinsic defects dominate the precipitation reaction.

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Authors and Affiliations

  1. Lawrence Berkeley Laboratory, Materials and Molecular Research Division, University of California, Bldg. 72, Rm. 125, 94720, Berkeley, CA

    Ronald Gronsky

  2. Swiss Aluminum Ltd., Research and Development, CH-8212, Neuhausen, Switzerland

    Peter Furrer

Authors
  1. Ronald Gronsky
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  2. Peter Furrer
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Gronsky, R., Furrer, P. Grain boundary precipitation in aluminum alloys: Effect of boundary structure. Metall Trans A 12, 121–127 (1981). https://doi.org/10.1007/BF02648516

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