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RETRACTED ARTICLE: Precipitation behavior of B2-ordered aluminide

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This article was retracted on 12 May 2015

Abstract

Fine dispersion of disordered phases is obtained in Ni−Al−Cr and Fe−Al−Co temary systems. A transmission electron microscope investigation has been performed on the precipitation of α-Cr in B2-ordered β-NiAl with different stoichiometry and α-Fe in B2-FeAl(Co) compound. Precipitation behavior and hardening were investigated by measuring the hardness variation. The hardness of NiAl and FeAl increases appreciably with the fine precipitation of α-Cr and α-Fe, and over-age softening occurs after prolonged aging. In the case of B2-NiAl(Cr), perfect lattice coherency is maintained at the interfaces between the α-Cr particles and the matrix during the initial stage of aging. After prolonged aging, a loss of coherency occurs by the attraction of matrix dislocations to the particle/matrix interface, followed by climbing around the particles. On the other hand, in the case of B2-FeAl(Co), the disordered α-Fe phase is present as a precipitate in the B2-FeAl(Co) matrix and has a cubic-cubic orientation with the matrix. At the early aging periods, prismatic dislocation loops formed in the B2-FeAl(Co) matrix. B2-FeAl(Co) matrix is typically hardened by the precipitation of α-Fe.

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Authors and Affiliations

  1. Dept. of Defense Science and Technology, Hoseo University, 165, Sechul-Ri, Baebang-myeon, Asan-si, 336-795, Chungnam, Korea

    Chang-Suk Han

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  1. Chang-Suk Han
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Correspondence to Chang-Suk Han.

Additional information

An erratum to this article is available at http://dx.doi.org/10.1007/s12540-015-2125-y.

The editorial board of Metals and Materials International has decided to retract this article for reasons of plagiarism and redundant (duplicate) publication.

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Han, CS. RETRACTED ARTICLE: Precipitation behavior of B2-ordered aluminide. Met. Mater. Int. 12, 467–475 (2006). https://doi.org/10.1007/BF03027746

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