Relative grain boundary energies in ultrafine grain Ni obtained by high pressure torsion

被引：10

作者：

Zimmerman, J. ^{[1
]}

Sharma, A. ^{[1
,2
]}

Divinski, S., V ^{[3
]}

Rabkin, E. ^{[1
]}

机构：

[1] Technion Israel Inst Technol, Dept Mat Sci & Engn, IL-3200003 Haifa, Israel

[2] Empa, Swiss Fed Labs Mat Sci & Technol, Lab Mech Mat & Nanostruct, Feuerwerkerstr 39, CH-3602 Thun, Switzerland

[3] Univ Munster, Inst Mat Phys, Wilhelm Klemm Str 10, D-48149 Munster, Germany

来源：

SCRIPTA MATERIALIA | 2020年 / 182卷 / 182期

关键词：

Severe plastic deformation; Atomic force microscopy; Grain boundary energy; Recrystallization; SEVERE PLASTIC-DEFORMATION; MICROSCOPY; DIFFUSION;

D O I：

10.1016/j.scriptamat.2020.03.008

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We employed the thermal grooving method and determined the ratio of grain boundary and surface energies in ultrafine grain Ni produced by high pressure torsion. The average values of the relative grain boundary energies were 0.41 and 0.35 after the primary recrystallization at 500 degrees C, and after equilibrating annealing at 800 degrees C, respectively. A significant decrease of the energy of individual stationary grain boundaries is found after two consecutive heat treatments at 500 and 600 degrees C. We discussed the obtained results in terms of an interplay of relaxation and consumption of deformation-induced defects by the grain boundaries. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

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页码：90 / 93

页数：4

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