Introducing Laves phase strengthening into an ultrafine-grained equiatomic CrFeNi alloy by niobium addition

Liang, Dingshan1,2; Wei, Chengxia1; Ren, Fuzeng1

2021-03-04

10.1016/j.msea.2020.140611

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING   影响因子和分区

0921-5093

1873-4936

We propose a strategy to enhance the yield strength of an ultrafine-grained equiatomic CrFeNi alloy through the addition of niobium to form a Laves phase in a face-center-cubic (fcc) matrix. The fabricated CrFeNiNb0.158 alloy shows a high yield strength of 961 +/- 10 MPa and a good ductility of 10.1 +/- 0.9%. The phase formation and strengthening mechanisms were analyzed by Hume-Rothery rules and quantitative estimation. The modulus mismatch between Laves phase and fcc matrix was found to be the main strengthening origin. This study provides significant insight into strengthening medium-/high-entropy alloys by introducing hard intermetallic compounds.

Medium-entropy alloy Laves phase Ultrafine-grained microstructure Strengthening mechanism

SCI ; EI

英语

第一 ; 通讯

Fundamental Research Program of Shenzhen[JCYJ20170412153039309] ; Shenzhen Peacock Plan, China[KQTD2016053019134356]

Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering

WOS:000620944000001

ELSEVIER SCIENCE SA

20205009612397

Niobium alloys ; Niobium ; Iron alloys

Iron Alloys:545.2 ; Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Materials Science:951

MATERIALS SCIENCE

Web of Science

1.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen, Guangdong, Peoples R China
2.Hong Kong Univ Sci & Technol, Dept Mech & Aerosp Engn, Clear Water Bay, Hong Kong, Peoples R China

Liang, Dingshan,Wei, Chengxia,Ren, Fuzeng. Introducing Laves phase strengthening into an ultrafine-grained equiatomic CrFeNi alloy by niobium addition[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2021,806.

Liang, Dingshan,Wei, Chengxia,&Ren, Fuzeng.(2021).Introducing Laves phase strengthening into an ultrafine-grained equiatomic CrFeNi alloy by niobium addition.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,806.

Liang, Dingshan,et al."Introducing Laves phase strengthening into an ultrafine-grained equiatomic CrFeNi alloy by niobium addition".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 806(2021).