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Volume 26 Issue 5
May  2019
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文章导航 >  矿物冶金与材料学报（英文）  > 2019  >  26(5): 634-641
C. D. Gómez-Esparza, R. Peréz-Bustamante, J. M. Alvarado-Orozco, J. Muñoz-Saldaña, R. Martínez-Sánchez, J. M. Olivares-Ramírez,  and A. Duarte-Moller, Microstructural evaluation and nanohardness of an AlCoCuCrFeNiTi high-entropy alloy, Int. J. Miner. Metall. Mater., 26(2019), No. 5, pp. 634-641. https://doi.org/10.1007/s12613-019-1771-3
Cite this article as:
C. D. Gómez-Esparza, R. Peréz-Bustamante, J. M. Alvarado-Orozco, J. Muñoz-Saldaña, R. Martínez-Sánchez, J. M. Olivares-Ramírez,  and A. Duarte-Moller, Microstructural evaluation and nanohardness of an AlCoCuCrFeNiTi high-entropy alloy, Int. J. Miner. Metall. Mater., 26(2019), No. 5, pp. 634-641. https://doi.org/10.1007/s12613-019-1771-3
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研究论文

Microstructural evaluation and nanohardness of an AlCoCuCrFeNiTi high-entropy alloy

  • Centro de Investigación en Materiales Avanzados (CIMAV), Laboratorio Nacional de Nanotecnología, Miguel de Cervantes No. 120, Chihuahua 31136, Chihuahua, México

  • CONACYT-Corporación Mexicana de Investigación en Materiales S.A. de C.V. (COMIMSA), Ciencia Y Tecnología 790, Fracc. Saltillo 400, Saltillo 25290, Coahuila, México

  • Centro de Ingeniería y Desarrollo Industrial, Querétaro Campus, Querétaro 76130, Qro., México

  • Centro de Investigación y de Estudios Avanzados del IPN, Unidad Querétaro, Libramiento Norponiente No. 2000, Fracc. Real de Juriquilla, Querétaro, Qro., 76230, México

  • Universidad Tecnológica de San Juan del Río, San Juan del Río 76800, Querétaro, México

  • Escuela de Ingeniería Civil, Industrial y Mecánica, Universidad De La Salle Bajío, León 37150, Guanajuato., México

  • 通讯作者:

    C. D. Gómez-Esparza    E-mail: cynthia.gomez@cimav.edu.mx

  • An AlCoCuCrFeNiTi high-entropy alloy (HEA) was prepared by mechanical alloying and sintering to study the effect of Ti addition to the widely studied AlCoCuCrFeNi system. The structural and microstructural characteristics were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The formation of four micrometric phases was detected:a Cu-rich phase with a face-centered cubic (fcc) structure, a body-centered cubic (bcc) solid solution with Cu-rich plate-like precipitates (fcc), an ordered bcc phase, and a tetragonal structure. The XRD patterns corroborate the presence of a mixture of bcc-, fcc-, and tetragonal-structured phases. The Vickers hardness of the alloy under study was more than twice that of the AlCoCuCrFeNi alloy. Nanoindentation tests were performed to evaluate the mechanical response of the individual phases to elucidate the relationship between chemical composition, crystal structure, and mechanical performance of the multiphase microstructure of the AlCoCuCrFeNiTi HEA.
    • Research Article

    Microstructural evaluation and nanohardness of an AlCoCuCrFeNiTi high-entropy alloy

    + Author Affiliations
      Abstract
    • An AlCoCuCrFeNiTi high-entropy alloy (HEA) was prepared by mechanical alloying and sintering to study the effect of Ti addition to the widely studied AlCoCuCrFeNi system. The structural and microstructural characteristics were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The formation of four micrometric phases was detected:a Cu-rich phase with a face-centered cubic (fcc) structure, a body-centered cubic (bcc) solid solution with Cu-rich plate-like precipitates (fcc), an ordered bcc phase, and a tetragonal structure. The XRD patterns corroborate the presence of a mixture of bcc-, fcc-, and tetragonal-structured phases. The Vickers hardness of the alloy under study was more than twice that of the AlCoCuCrFeNi alloy. Nanoindentation tests were performed to evaluate the mechanical response of the individual phases to elucidate the relationship between chemical composition, crystal structure, and mechanical performance of the multiphase microstructure of the AlCoCuCrFeNiTi HEA.
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