On the Hall-Petch relationship in a nanostructured Al-Cu alloy

被引：209

作者：

Shanmugasundaram, T. ^{[1
]}

Heilmaier, M. ^{[1
]}

Murty, B. S. ^{[2
]}

Sarma, V. Subramanya ^{[2
]}

机构：

[1] Tech Univ Darmstadt, Dept Mat Sci, D-64287 Darmstadt, Germany

[2] Indian Inst Technol, Dept Met & Mat Engn, Chennai 600036, Tamil Nadu, India

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2010年 / 527卷 / 29-30期

关键词：

Aluminum alloys; Mechanical alloying; Nanostructured materials; Hot pressing; Hall-Petch relation; ULTRAFINE-GRAINED ALUMINUM; MECHANICAL-PROPERTIES; DEFORMATION; EXTRUSION; BEHAVIOR; POWDER;

D O I：

10.1016/j.msea.2010.08.070

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Mechanical properties of bulk nanocrystalline Al-4Cu alloys with grain sizes from 47 to 105 nm, synthesized by mechanically alloying followed by vacuum hot pressing at different temperatures, were analysed through Hall-Petch relation. Hall-Petch analysis revealed a high frictional stress (170 MPa) and a high positive slope (0.13 MPa root m) as compared to pure Al, which has a frictional stress (15-30 MPa) and a slope (0.06-0.09 MPa root m). From a detailed evaluation of different strengthening mechanisms it is inferred that the Al(2)Cu precipitates and oxide particles are the likely reason for such high values of frictional stress and slope. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：7821 / 7825

页数：5

共 22 条

[1]

*ASM INT, 1984, ASM MET REF BOOK

[2] MICROSTRUCTURE AND MECHANICAL-PROPERTIES OF CONCENTRATED COPPER NIOBIUM ALLOYS PREPARED BY MECHANICAL ALLOYING [J].

BENGHALEM, A ;

MORRIS, DG .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1993, 161 (02) :255-266

[3] Macroscopic and microscopic aspects of the deformation and fracture mechanisms of ultrafine-grained aluminum processed by hot isostatic pressing [J].

Billard, S ;

Fondère, JP ;

Bacroix, B ;

Dirras, GF .

ACTA MATERIALIA, 2006, 54 (02) :411-421

[4] Strengthening mechanisms in cryomilled ultrafine-grained aluminum alloy at quasi-static and dynamic rates of loading [J].

Cao, Buyang ;

Joshi, Shailendra P. ;

Ramesh, K. T. .

SCRIPTA MATERIALIA, 2009, 60 (08) :619-622

[5] Tensile properties of in situ consolidated nanocrystalline Cu [J].

Cheng, S ;

Ma, E ;

Wang, YM ;

Kecskes, LJ ;

Youssef, KM ;

Koch, CC ;

Trociewitz, UP ;

Han, K .

ACTA MATERIALIA, 2005, 53 (05) :1521-1533

[6] Tensile behavior of bulk nanocrystalline aluminum synthesized by hot extrusion of ball-milled powders [J].

Choi, H. J. ;

Lee, S. W. ;

Park, J. S. ;

Bae, D. H. .

SCRIPTA MATERIALIA, 2008, 59 (10) :1123-1126

[7] Heat-resistant bulk nanostructured P/M aluminium [J].

Cintas, J. ;

Montes, J. M. ;

Cuevas, F. G. ;

Herrera, E. J. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2008, 458 (1-2) :282-285

[8]

Eskandarany M. S. E., 1991, J LESS-COMMON MET, V169, P235

[9] NANOCRYSTALLINE METALS PREPARED BY HIGH-ENERGY BALL MILLING [J].

FECHT, HJ ;

HELLSTERN, E ;

FU, Z ;

JOHNSON, WL .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1990, 21 (09) :2333-2337

[10]

Hall H.O., 1951, P PHYS SOC B, V64, P747

← 1 2 3 →