Effect of temperature of HPT deformation and the initial orientation on the structural evolution in single-crystal niobium

被引：15

作者：

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

Degtyarev, M. V. ^{[1
]}

Pilyugin, V. P. ^{[1
]}

Chashchukhina, T. I. ^{[1
]}

Voronova, L. M. ^{[1
]}

Patselov, A. M. ^{[1
]}

机构：

[1] Russian Acad Sci, Mikheev Inst Met Phys, Ural Branch, Ul S Kovalevskoi 18, Ekaterinburg 620990, Russia

来源：

PHYSICS OF METALS AND METALLOGRAPHY | 2016年 / 117卷 / 04期

基金：

俄罗斯基础研究基金会;

关键词：

niobium; severe plastic deformation; temperature; structure; single-crystal orientation; HIGH-PRESSURE TORSION; THERMAL-STABILITY; NANOCRYSTALLINE NIOBIUM; MOLYBDENUM; NB; HARDNESS; METALS; SIZE; IRON; COLD;

D O I：

10.1134/S0031918X16040062

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The structural evolution and hardness of sing-crystal niobium with various initial orientations are investigated after its deformation in Bridgman anvils at room (290 K) and cryogenic (80 K) temperatures. It is shown that no twinning occurs upon cryogenic deformation; thin prolonged bands dividing the matrix into weakly misoriented regions are formed. The uniform-in-size structure of a nanoscale level (d (av) = 40 nm) is formed during cryogenic deformation after the maximum achieved true strain. The average microcrystallite size observed after room-temperature deformation is 120 nm.

引用

页码：336 / 347

页数：12

共 35 条

[1] INFLUENCE OF POLYCRYSTAL GRAIN SIZE ON SEVERAL MECHANICAL PROPERTIES OF MATERIALS [J].