Distribution of Alloying Elements within the Constituent Phases of a C-containing γ-TiAl Based Alloy studied by Atom Probe Tomography. Issue 1760 (2nd January 2015)

• Record Type: Journal Article
• Authors: Baker, I.; Heilmaier, M.; Kishida, K.; Mills, M.; Miura, S.; Klein, Thomas; Mendez-Martin, Francisca; Schachermayer, Michael; Rashkova, Boryana; Clemens, Helmut; Mayer, Svea
• Is Part Of: MRS proceedings. Issue 1760(2015)
• Publication Date: 2015-01-02
• Subjects: Electrical engineering -- Congresses; Physics -- Congresses; Materials -- Research -- Congresses; Materials science -- Congresses; 620.11
• DOI: 10.1557/opl.2014.966
• Languages: English
• ISSNs: 0272-9172

Abstract

<abstract abstract-type="normal"> <title>ABSTRACT</title> <p>The distribution of alloying elements in the constituent phases of a C-containing γ-TiAl based alloy has been characterized locally by atom probe tomography. The major elements of the alloy under consideration â€" Ti, Al, Nb, and Mo â€" are distributed uniformly within each of the constituent phases. Furthermore, Mo is preferentially dissolved in the β_o-phase, whereas Nb content is similar in all phases. The selected C concentration of the alloy is below the overall solubility limit as no precipitates have been observed. Therefore, C is enriched in the α₂-phase, whereas the β_o-phase is depleted of C. In addition, β_o/γ-interfaces have been prepared by site specific sample preparation and characterized by atom probe tomography. Segregation of Mo and C into the interfaces and their close vicinity was observed.</p> </abstract>