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The ultrahigh charpy impact toughness of forged AlxCoCrFeNi high entropy alloys at room and cryogenic temperatures.(Report)

Li, Dongyue ; Zhang, Yong

Intermetallics, 2016, Vol.70, p.24 [Tạp chí có phản biện]

ISSN: 0966-9795 ; DOI: 10.1016/j.intermet.2015.11.002

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  • Nhan đề:
    The ultrahigh charpy impact toughness of forged AlxCoCrFeNi high entropy alloys at room and cryogenic temperatures.(Report)
  • Tác giả: Li, Dongyue ; Zhang, Yong
  • Chủ đề: Alloys – Mechanical Properties
  • Là 1 phần của: Intermetallics, 2016, Vol.70, p.24
  • Mô tả: To access, purchase, authenticate, or subscribe to the full-text of this article, please visit this link: http://dx.doi.org/10.1016/j.intermet.2015.11.002 Byline: DongYue Li [drzhangy@skl.ustb.edu.cn], Yong Zhang (*) Keywords High-entropy alloys; Toughness; Mechanical testing Highlights * The tensile strength and ductility increase with the decrease of the temperature. * The tensile strength and elongation of Al.sub.0.1CoCrFeNi alloy reach of 1042 MPa and 81.6% at 77 K, respectively. * The Charpy impact energy of Al.sub.0.1CoCrFeNi alloy can reach to 420 J at room temperature. Abstract AlxCoCrFeNi high-entropy alloys (HEAs) with different aluminum contents (i.e., x values in molar ratio, where x = 0.1, 0.3) were initially prepared using vacuum magnetic levitation melting and, then, plate samples were prepared by hot forging method. The two five-element HEAs, Al.sub.0.1CoCrFeNi and Al.sub.0.3CoCrFeNi, both had a simple face-centered cubic (FCC) structure. The measurements of Charpy impact energy with V-type notch and tensile tests were carried out at different temperatures. It was observed that the tensile strength and elongation increased with decreasing temperatures and reached 1042 MPa and 81.6% at 77 K, respectively, for the Al.sub.0.1CoCrFeNi alloy. The Charpy impact energy reached a maximum value of 420 J at room temperature for the Al.sub.0.1CoCrFeNi alloy. Author Affiliation: State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Xueyuan Road 30#, Beijing 100083, China * Corresponding author. Article History: Received 18 August 2015; Revised 12 November 2015; Accepted 13 November 2015
  • Ngôn ngữ: English
  • Số nhận dạng: ISSN: 0966-9795 ; DOI: 10.1016/j.intermet.2015.11.002

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