INDENTATION SIZE EFFECT IN HIGH PRESSURE TORSION PROCESSED HIGH ENTROPY ALLOY

被引：5

作者：

Hausild, Petr ^{[1
]}

Cizek, Jakub ^{[2
]}

Cech, Jaroslav ^{[1
]}

Zyka, Jiri ^{[3
]}

Kim, Hyoung Seop ^{[4
]}

机构：

[1] Czech Tech Univ, Fac Nucl Sci & Phys Engn, Dept Mat, Trojanova 13, Prague 12000, Czech Republic

[2] Charles Univ Prague, Fac Math & Phys, Dept Low Temp Phys, V Holesovickach 2, CZ-18000 Prague 8, Czech Republic

[3] UJP PRAHA As, Nad Kaminkou 1345, Prague 15600, Czech Republic

[4] POSTECH, Dept Mat Sci & Engn, Pohang 790784, South Korea

来源：

PROCEEDINGS OF THE 14TH INTERNATIONAL CONFERENCE ON LOCAL MECHANICAL PROPERTIES - LMP 2019, VOL 27 | 2020年 / 27卷

关键词：

High entropy alloys; high pressure torsion; indentation size effect; nanoindentation; GRID INDENTATION; ELASTIC-MODULUS; HARDNESS; NANOCRYSTALLINE; MICROSTRUCTURE;

D O I：

10.14311/APP.2020.27.0141

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

High entropy alloy HfNbTaTiZr in as cast conditions and after high pressure torsion straining was characterized by nanoindentation. The length-scale dependent material response (indentation size effect) was characterized by indentation at various indentation depths. Hardness dependence on the characteristic length (depth of penetration) indicated decomposition of disordered high entropy alloy in the as cast sample, which probably occurred during slow cooling after casting. Subsequent severe plastic deformation by high pressure torsion led on the other hand to the short-range disorder of (originally partially decomposed as cast) structure. Further hardening was generated during high pressure torsion by the mechanisms of grain refinement and increasing dislocation density.

引用

页码：141 / 144

页数：4

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