Refractory high entropy alloy with ductile intermetallic B2 matrix / hard bcc particles and exceptional strain hardening capacity

被引：38

作者：

Yurchenko, Nikita ^{[1
]}

Panina, Evgeniya ^{[1
]}

Shaysultanov, Dmitry ^{[1
]}

Zherebtsov, Sergey ^{[1
]}

Stepanov, Nikita ^{[1
]}

机构：

[1] Belgorod Natl Res Univ, Lab Bulk Nanostruct Mat, Belgorod 308015, Russia

来源：

MATERIALIA | 2021年 / 20卷

基金：

俄罗斯科学基金会;

关键词：

Refractory high entropy alloys; B2; phase; Structure; Mechanical properties; Deformation behavior; MECHANICAL-PROPERTIES; B2-TYPE COZR; TEMPERATURE; MICROSTRUCTURE; PRECIPITATION; BEHAVIOR; NANOPARTICLES; SUPERALLOYS; STABILITY; ADDITIONS;

D O I：

10.1016/j.mtla.2021.101225

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this study, a new Nb30Mo30Hf20Co20 (at. %) refractory high entropy alloy (RHEA) comprising an intermetallic (Hf, Co)-rich B2 matrix and disordered (Nb, Mo)-rich bcc particles was introduced. The B2 matrix showed relatively high dislocation mobility, which, coupled with its continuity, allowed bridging and blunting of the cracks formed in the hard bcc particles during plastic deformation. The complex deformation behavior of the constitutive phases resulted in extraordinary high strain hardening capacity at 22-600 degrees C, exceeding single- and multi-phase RHEAs, together with the high strength. Our work endows new opportunities to develop high-performance alloys for high-temperature applications.

引用

页数：7

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