Effect of Ti and C additions on the microstructure and mechanical properties of the FeCoCrNiMn high-entropy alloy - Details

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Abstract：

To　improve　the　yield　strength　of　an　FeCoCrNiMn　high-entropy　alloy　(HEA),　elemental　Ti　and　C　were　doped　into　the　alloy.　Subsequently,　an　in　situ　synthesized　carbides　particle-strengthened　HEA　matrix　composite　was　prepared　by　mechanical　alloying　(MA),　followed　by　a　vacuum　hot-pressing　sintering　(VHPS)　method.　The　TiC　nanoparticles　were　distributed　along　the　grain　boundaries.　The　microstructure　of　the　alloy　contained　a　face-centered　cubic　(FCC)　solid　solution　as　the　matrix　phase　and　small　amounts　of　TiC,　M23C6　and　M7C3　(where　M　=　Cr,　Mn,　Fe)　carbides.　The　addition　of　elemental　Ti　and　C　significantly　improved　the　room-temperature　compressive　yield　strength　of　the　FeCoCrNiMn　HEA　from　774　MPa　to　1445　MPa　(an　86.7%　increase),　accompanied　by　a　decrease　in　the　compressive　strength　and　plasticity.　Grain　boundary　strengthening　and　precipitation　strengthening　are　the　main　strengthening　mechanisms　of　the　alloy　doping　with　elemental　Ti　and　C.　©　2018　Elsevier　B.V.

Keyword：

High-entropy alloy; Mechanical properties; Microstructure; Powder metallurgy; TiC nanoparticles

Community：

[ 1 ] [Cheng, H.]School of Materials Science and Engineering, Fuzhou University, Fuzhou, 350116, China
[ 2 ] [Cheng, H.]School of Mechanical Engineering, Taizhou University, Taizhou, 318000, China
[ 3 ] [Chen, W.]School of Materials Science and Engineering, Fuzhou University, Fuzhou, 350116, China
[ 4 ] [Liu, X.]School of Materials Science and Engineering, Fujian University of Technology, Fuzhou, 350118, China
[ 5 ] [Tang, Q.]School of Mechanical & Electrical Engineering, Putian University, Putian, 351100, China
[ 6 ] [Xie, Y.]School of Materials Science and Engineering, Fuzhou University, Fuzhou, 350116, China
[ 7 ] [Dai, P.]School of Materials Science and Engineering, Fuzhou University, Fuzhou, 350116, China
[ 8 ] [Dai, P.]School of Materials Science and Engineering, Fujian University of Technology, Fuzhou, 350118, China
[ 9 ] [Dai, P.]Fujian Provincial Key Laboratory of Advanced Materials Processing and Application, Fuzhou, 350108, China

Reprint 's Address：

[Dai, P.]School of Materials Science and Engineering, Fuzhou UniversityChina

Email：

pqdai@126.com

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Source ：

Materials Science and Engineering A

ISSN： 0921-5093

Year： 2018

Volume： 719

Page： 192-198

4 . 0 8 1

JCR@2018

6 . 1 0 0

JCR@2023

ESI HC Threshold：284

JCR Journal Grade：1

CAS Journal Grade：2

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SCOPUS Cited Count： 97

ESI Highly Cited Papers on the List： 0 Unfold All

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30 Days PV： 3

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