Microstructures and mechanical properties of CrNb, CrNbTi, and CrNbTaTi concentrated refractory alloys

被引：17

作者：

Butler, T. M. ^{[1
]}

Senkov, O. N. ^{[1
,2
]}

Velez, M. A. ^{[1
,2
]}

Daboiku, T., I ^{[1
,2
]}

机构：

[1] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA

[2] UES Inc, 4401 Dayton Xenia Rd, Dayton, OH 45432 USA

来源：

INTERMETALLICS | 2021年 / 138卷

关键词：

High-entropy; Refractory; Mechanical strength; OXIDATION;

D O I：

10.1016/j.intermet.2021.107323

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The microstructures and mechanical properties in compression (25 degrees C, 1000 degrees C and 1200 degrees C) of CrNb, CrNbTi and CrNbTaTi are reported. The CrNb alloy consisted of a Cr2Nb Laves phase matrix and Nb-rich BCC precipitates. After additions of Ti (CrNbTi alloy) the microstructure inverts to a Ti-rich BCC matrix, with Laves phase precipitates inside the matrix phase. Further additions of Ta to CrNbTi refined and decreased the volume fraction of the Laves phase particles in the CrNbTaTi alloy. CrNb exhibited limited ductility at 25 degrees C and 1000 degrees C, but became very ductile at 1200 degrees C and offered the highest compressive strength at all studied temperatures. CrNbTi and CrNbTaTi had better ductility, but suffered from a reduction in compressive strength.

引用

页数：9

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