Development of the γ′ phase strengthened high-temperature high-entropy alloys with excellent mechanical properties

Wang，Chenglei1; Liang，Chaojie1,5; Yang，Mujin2; Huang，Chao3; Yao，Zhifu3; Qiu，Bing1; Zhang，Kexiang1; Xie，Yingguan1; Liang，Mulin1; Liu，Weijie1; Yang，Jijie1; Zhou，Shengfeng4

2022-09-01

10.1016/j.matdes.2022.110940

Materials and Design   Impact Factor & Quartile

0264-1275

1873-4197

In this work, a series of novel γ' phase strengthened Ti6Al6-based HEAs with six kinds of alloying elements (including Nb, Hf, Ta, W, Mo, and V) were carefully examined combined with TEM, SEM, XRD, and DSC technologies. The impurities FeX (X = Nb, Hf, and Ta) Laves were detected in the Nb-, Hf- and Ta-doping alloys while the other three present a perfect (γ + γ') dual-phase microstructures. And the W-, Mo- and V-doping HEAs possess a much better strength-plasticity combination than the Ti6Al6 alloy at room- and high-temperature. The 1.5 W HEA has a tensile strength of ∼ 1300 MPa and good plasticity (>30 %) at room temperature. In the meantime, it also performs much good at 800 °C (∼11 % elongation and the tensile strength of ∼ 750 MPa). The addition of W, Mo, and V elements causes the main peak of the HEAs to shift to the left to varying degrees, among which the biggest shift is 1.5 V HEA, followed by 1.5Mo HEA, the smaller is the 1.5 W HEA. At the same time, the γ' precipitates phase of the alloy has a highly coherent relationship with the FCC matrix phase, which ensures that the strength of the alloy is increased without sacrificing its plasticity.

High-temperature high-entropy alloys High-temperature performance Lattice misfit Precipitation strengthening

EI ; SCI

English

Others

National Natural Science Founda- tion of China[52161011] ; Natural Science Foundation of Guangxi Province["2018GXNSFAA281244","2020GXNSFAA297060"] ; China Postdoctoral Science Foundation[2020M681092] ; Major Research Plan of the National Natural Science Foundation of China[92166112] ; Projects of MOE Key Lab of Disaster Forecast and Control in Engineering in Jinan University[20200904006] ; Guangdong Basic and Applied Basic Research Foundation[2020B1515420004] ; Open Project Program of Wuhan National Laboratory for Optoelectronics[2021WNLOKF010] ; Scientific Research and Technology Develop- ment Program of Guilin["2020010903","20210217-6"] ; Guangxi Key Laboratory of Information Materials["211024-Z","211003-K","201016-Z"] ; Innovation Project of GUET Graduate Education["2020YCXS118","2022YCXS200"] ; [EIMD-AB202009]

Materials Science

Materials Science, Multidisciplinary

WOS:000885892400004

ELSEVIER SCI LTD

20223012410492

Alloying elements ; Aluminum alloys ; Binary alloys ; Entropy ; Hafnium alloys ; High-entropy alloys ; Niobium alloys ; Precipitation (chemical) ; Tantalum alloys ; Tensile strength ; Titanium alloys

Metallurgy and Metallography:531 ; Metallurgy:531.1 ; Aluminum Alloys:541.2 ; Titanium and Alloys:542.3 ; Chromium and Alloys:543.1 ; Tantalum and Alloys:543.4 ; Iron Alloys:545.2 ; Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Thermodynamics:641.1 ; Chemical Operations:802.3 ; Materials Science:951

MATERIALS SCIENCE

2-s2.0-85134679413

Scopus

1.School of Materials Science and Engineering,and Guangxi Key Laboratory of Information Materials,and Engineering Research Center of Electronic Information Materials and Devices,Ministry of Education,Guilin University of Electronic Technology,Guilin,Guangxi,541004,China
2.Department of Mechanical and Energy Engineering,Southern Southern University of Science and Technology,Shenzhen,1088 Xueyuan Blvd, Guangdong,518055,China
3.School of Materials Science and Engineering,Institute of Materials Genome and Big Data,Harbin Institute of Technology,Shenzhen,Guangdong,518055,China
4.Institute of advanced wear & corrosion resistance and functional materials,Jinan University,Guangzhou,Guangdong,510632,China
5.School of Materials Science and Engineering,Central South University,Changsha,Hunan,410083,China

Wang，Chenglei,Liang，Chaojie,Yang，Mujin,等. Development of the γ′ phase strengthened high-temperature high-entropy alloys with excellent mechanical properties[J]. Materials and Design,2022,221.

Wang，Chenglei.,Liang，Chaojie.,Yang，Mujin.,Huang，Chao.,Yao，Zhifu.,...&Zhou，Shengfeng.(2022).Development of the γ′ phase strengthened high-temperature high-entropy alloys with excellent mechanical properties.Materials and Design,221.

Wang，Chenglei,et al."Development of the γ′ phase strengthened high-temperature high-entropy alloys with excellent mechanical properties".Materials and Design 221(2022).