Simultaneous XEDS‐EBSD Study of NiCoAlFeCu(Cr, Ti) Multi‐Component Alloys. Issue 4 (5th July 2017)

• Record Type: Journal Article
• Authors: Cruz‐Gandarilla, Francisco; Coreño‐Alonso, Oscar; Cabañas–Moreno, José Gerardo; Chan, Lisa H.; Gómez‐Esparza, Cynthia; Martínez Sánchez, Roberto
• Other Names: Gandarilla Francisco Cruz guestEditor.; Bolmaro Raúl guestEditor.; Esling Claude guestEditor.; Wright Stuart guestEditor.
• Is Part Of: Advanced engineering materials. Volume 20:Issue 4(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-07-05
• Subjects: EBSD -- high‐entropy alloys -- mechanical alloying -- NiCoAlFeCuCrTi alloys -- XEDS -- X‐Ray diffraction; Materials -- Periodicals; 620.11
• DOI: 10.1002/adem.201700215
• Languages: English
• ISSNs: 1438-1656

Abstract

Abstract : NiCoAlFeCu, NiCoAlFeCuCr, and NiCoAlFeCuCrTi high‐entropy alloys are prepared by mechanical alloying and sintered at 1200 °C and a pressure of 1.5 GPa for 3 h. The alloys were characterized by X‐ray diffraction (XRD), electron backscatter diffraction (EBSD), and X‐ray energy dispersive spectrometry (XEDS). The phases found are mostly variants of the face centered cubic (fcc) phases (space group F m 3 ¯ m ), bcc (space group I m 3 ¯ m ), and hexagonal (space group P63 /mmc). Adding Ti to the NiCoAlFeCuCr system has strong effects on the solubility of the elements in the different phases and increases dramatically the number of phases present. The use of EBSD and XEDS allowed identification of a cubic phase in NiCoAlFeCu samples, which cannot be identified by XRD alone, and confirmed its identification by XRD in NiCoAlFeCuCr samples. The spatial distribution of phases and the grain structure in the three different samples, measured by EBSD and XEDS, is reported. Abstract : Phase analysis in NiCoAlFeCu HEA alloys by XRD is frequently complicated by the simultaneous occurrence of several simple fcc and bcc structures. By linking together EBSD and XEDS analysis, cubic phases with similar lattice parameters are differentiated and their microscopic spatial distribution is revealed.