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author:

Cheng, Hu (Cheng, Hu.) [1] | Liu, Xiaoqiang (Liu, Xiaoqiang.) [2] | Tang, Qunhua (Tang, Qunhua.) [3] | Wang, Weiguo (Wang, Weiguo.) [4] | Yan, Xiaohui (Yan, Xiaohui.) [5] | Dai, Pinqiang (Dai, Pinqiang.) [6]

Indexed by:

Scopus SCIE

Abstract:

To improve the strength and hardness, Al-containing FeCoCrNiMn high-entropy alloys (HEAs) were fabricated by mechanical alloying (MA) and hot-pressed sintering. The effects of Al concentration on the microstructure and mechanical properties of the alloys were examined. It was found that the Al-containing alloys consisted of the matrix fcc or fcc + bcc duplex solid solution phases and a small quantity of M7C3 + M23C6 (where M = Cr, Mn, Fe) carbides and Al2O3 phases. A high Al concentration induced bcc precipitates in the alloys, and with the increase of Al concentration, the crystalline structure of the matrix solid solution phase changed from fcc to bcc. The addition of Al obviously strengthened the alloys, especially the alloys that contained fcc + bcc duplex solid solution phases. For example, the yield strength, compressive strength and hardness of alloy FeCoCrNiMnAl0.7 reached as high as 2230 MPa, 2552 MPa and 622 HV, respectively. The high strength/hardness was attributed mainly to the finer grains and the bcc precipitation. (C) 2018 Elsevier B.V. All rights reserved.

Keyword:

High-entropy alloy Mechanical properties Microstructure Powder metallurgy Strengthening mechanisms

Community:

  • [ 1 ] [Cheng, Hu]Taizhou Univ, Sch Pharmaceut & Mat Engn, Taizhou 318000, Peoples R China
  • [ 2 ] [Cheng, Hu]Fuzhou Univ, Sch Mat Sci & Engn, Fuzhou 350116, Fujian, Peoples R China
  • [ 3 ] [Liu, Xiaoqiang]Fujian Univ Technol, Sch Mat Sci & Engn, Fuzhou 350118, Fujian, Peoples R China
  • [ 4 ] [Wang, Weiguo]Fujian Univ Technol, Sch Mat Sci & Engn, Fuzhou 350118, Fujian, Peoples R China
  • [ 5 ] [Dai, Pinqiang]Fujian Univ Technol, Sch Mat Sci & Engn, Fuzhou 350118, Fujian, Peoples R China
  • [ 6 ] [Tang, Qunhua]Putian Univ, Sch Mech & Elect Engn, Putian 351100, Peoples R China
  • [ 7 ] [Yan, Xiaohui]Xiamen Univ, State Key Lab Mol Vaccinol & Mol Diagnost, Xiamen 361005, Peoples R China
  • [ 8 ] [Yan, Xiaohui]Xiamen Univ, Ctr Mol Imaging & Translat Med, Sch Publ Hlth, Xiamen 361005, Peoples R China
  • [ 9 ] [Dai, Pinqiang]Fujian Prov Key Lab Adv Mat Proc & Applicat, Fuzhou 350108, Fujian, Peoples R China

Reprint 's Address:

  • 程虎

    [Cheng, Hu]Taizhou Univ, Sch Pharmaceut & Mat Engn, Taizhou 318000, Peoples R China;;[Dai, Pinqiang]Fujian Univ Technol, Sch Mat Sci & Engn, Fuzhou 350118, Fujian, Peoples R China

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Source :

JOURNAL OF ALLOYS AND COMPOUNDS

ISSN: 0925-8388

Year: 2019

Volume: 775

Page: 742-751

4 . 6 5

JCR@2019

5 . 8 0 0

JCR@2023

ESI Discipline: MATERIALS SCIENCE;

ESI HC Threshold:236

JCR Journal Grade:2

CAS Journal Grade:2

Cited Count:

WoS CC Cited Count: 56

SCOPUS Cited Count: 67

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 3

Online/Total:101/10014911
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