Oxide dispersion strengthened CoCrFeNiMn high-entropy alloy

被引：166

作者：

Hadraba, Hynek ^{[1
]}

Chlup, Zdenek ^{[1
]}

Dlouhy, Antonin ^{[1
]}

Dobes, Ferdinand ^{[1
]}

Roupcova, Pavia ^{[1
]}

Vilemova, Monika ^{[2
]}

Matejicek, Jiri ^{[2
]}

机构：

[1] Acad Sci Czech Republ, Inst Phys Mat, Zizkova 22, Brno 61662, Czech Republic

[2] Acad Sci Czech Republ, Inst Plasma Phys, Za Slovankou 1782-3, Prague 18200, Czech Republic

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2017年 / 689卷

关键词：

High-entropy alloy (HEA); Oxide dispersion strengthened (ODS) alloy; Mechanical alloying; Powder metallurgy; Spark plasma sintering; Creep; MECHANICAL-PROPERTIES; MICROSTRUCTURE; EUROFER97; BEHAVIOR; ELEMENTS;

D O I：

10.1016/j.msea.2017.02.068

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The CoCrFeNiMn high entropy alloy and its strengthened version by in-situ formed dispersion of yttria nano oxides prepared via mechanical alloying were investigated. The grain refinement of the one phase FCC alloy by presence of oxides was determined by microstructural analyses to be 50%. The positive effect of oxide dispersion on the strength properties was found to be between 30% and 70% for room and elevated temperatures, respectively. The resulting creep strain rates for the strengthened alloy were significantly lower, i.e., three orders for 30 MPa stress level, comparing the initial one, therefore, the pining mechanism was among others very effective.

引用

页码：252 / 256

页数：5

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