Grain size effects in the deformation of [0001] textured nanocrystalline Zr

被引：35

作者：

Ruestes, C. J. ^{[1
]}

Bertolino, G. ^{[2
]}

Ruda, M. ^{[3
]}

Farkas, D. ^{[4
]}

Bringa, E. M. ^{[5
]}

机构：

[1] Univ Nac Cuyo, Inst Balseiro, Inst Ciencias Basicas, RA-5500 Mendoza, Argentina

[2] Ctr Atom Bariloche, CONICET, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

[3] Univ Comahue, Ctr Atom Bariloche, CNEA, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

[4] Virginia Tech, Dept Mat Sci & Engn, Blacksburg, VA 24061 USA

[5] Univ Nac Cuyo, CONICET, Inst Ciencias Basicas, RA-5500 Mendoza, Argentina

来源：

SCRIPTA MATERIALIA | 2014年 / 71卷

关键词：

Zirconium; Nanocrystalline materials; Hall-Petch effect; Molecular dynamics (MD); MECHANICAL-PROPERTIES; MICROSTRUCTURE EVOLUTION; PLASTIC-DEFORMATION; STRAIN-RATE; ZIRCONIUM; DYNAMICS; BEHAVIOR; METALS; SIMULATION; TITANIUM;

D O I：

10.1016/j.scriptamat.2013.09.010

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Molecular dynamics was used to simulate tensile testing of columnar grain samples of nanocrystalline Zr with random rotations around the [0 0 0 1] axis. For grain sizes smaller than a critical size the results show an inverse Hall-Petch effect. For larger grains the calculated Hall Petch constant agrees well with the experimental data. Grain size effects on deformation mechanisms, including grain boundary sliding and dislocation emission, are also discussed. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：9 / 12

页数：4

共 48 条

[1] PLASTIC DEFORMATION OF ZIRCONIUM SINGLE CRYSTALS
AKHTAR, A
TEGHTSOO.A
[J]. ACTA METALLURGICA, 1971, 19 (07): : 655 - &
[2] The strongest size
Argon, A. S.
Yip, S.
[J]. PHILOSOPHICAL MAGAZINE LETTERS, 2006, 86 (11) : 713 - 720
[3] Ashby MF., 1996, ENG MAT 1 INTRO THEI, V2nd
[4] Bertolino G., 2001, THESIS I BALSEIRO UN
[5] Strain rates in molecular dynamics simulations of nanocrystalline metals
Brandl, Christian
Derlet, Peter M.
Van Swygenhoven, Helena
[J]. PHILOSOPHICAL MAGAZINE, 2009, 89 (34-36) : 3465 - 3475
[6] Screw dislocation in zirconium: An ab initio study
Clouet, Emmanuel
[J]. PHYSICAL REVIEW B, 2012, 86 (14):
[7] Toward a quantitative understanding of mechanical behavior of nanocrystalline metals
Dao, M.
Lu, L.
Asaro, R. J.
De Hosson, J. T. M.
Ma, E.
[J]. ACTA MATERIALIA, 2007, 55 (12) : 4041 - 4065
[8] Tensile deformation of fcc Ni as described by an EAM potential
Farkas, Diana
Patrick, Laura
[J]. PHILOSOPHICAL MAGAZINE, 2009, 89 (34-36) : 3435 - 3450
[9] RELATIONSHIP BETWEEN DEFORMATION TWINNING AND STRESS-STRAIN BEHAVIOR OF POLYCRYSTALLINE TITANIUM AND ZIRCONIUM AT 77 K
GARDE, AM
AIGELTINGER, E
REEDHILL, RE
[J]. METALLURGICAL TRANSACTIONS, 1973, 4 (10): : 2461 - 2468
[10] Sensitivity of deformation twinning to grain size in titanium and magnesium
Ghaderi, Alireza
Barnett, Matthew R.
[J]. ACTA MATERIALIA, 2011, 59 (20) : 7824 - 7839

← 1 2 3 4 5 →