The influence of grain size on the mechanical properties of nanocrystalline aluminium

被引：54
作者：
Bonetti, E [1 ]
Pasquini, L [1 ]
Sampaolesi, E [1 ]
机构：
[1] IST NAZL FIS MAT,I-40127 BOLOGNA,ITALY
来源：
NANOSTRUCTURED MATERIALS | 1997年 / 9卷 / 1-8期
关键词：
D O I：
10.1016/S0965-9773(97)00137-2
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Uniaxial tensile tests were performed at room temperature on nanocrystalline aluminium (n-Al) prepared by mechanical attrition and cold consolidation with average grain size in the 20-40 nm range. The stress-strain curves analysis shows an enhanced tensile strength and a reduced ductility of n-Al with respect to the coarse-grained material. Anyway, the strength increase is much lower than predicted by extrapolation of the Hall-Petch relation to nanometer sized grains. Moreover, the strengthening rate (Hall Petch coefficient) is strongly reduced in comparison with coarse-grained Al. The observed behaviour is discussed in connection with microstructure evolution during mechanical attrition. (C) 1997 Acta Metallurgica Inc.
引用
收藏
页码：611 / 614
页数：4
相关论文
共 13 条
  • [1] ON THE VALIDITY OF THE HALL-PETCH RELATIONSHIP IN NANOCRYSTALLINE MATERIALS
    CHOKSHI, AH
    ROSEN, A
    KARCH, J
    GLEITER, H
    [J]. SCRIPTA METALLURGICA, 1989, 23 (10): : 1679 - 1683
  • [2] ENZO S, 1993, KEY ENG MAT, V81-3, P49, DOI 10.4028/www.scientific.net/KEM.81-83.49
  • [3] THE STUDY OF GRAIN-SIZE DEPENDENCE OF YIELD STRESS OF COPPER FOR A WIDE GRAIN-SIZE RANGE
    GERTSMAN, VY
    HOFFMANN, M
    GLEITER, H
    BIRRINGER, R
    [J]. ACTA METALLURGICA ET MATERIALIA, 1994, 42 (10): : 3539 - 3544
  • [4] THE DEFORMATION AND AGEING OF MILD STEEL .3. DISCUSSION OF RESULTS
    HALL, EO
    [J]. PROCEEDINGS OF THE PHYSICAL SOCIETY OF LONDON SECTION B, 1951, 64 (381): : 747 - 753
  • [5] Elastic and plastic behavior of submicrometer-sized polycrystalline NiAl
    Hoffmann, M
    Birringer, R
    [J]. ACTA MATERIALIA, 1996, 44 (07) : 2729 - 2736
  • [6] Nieman G. W., 1992, Nanostructured Materials, V1, P185, DOI 10.1016/0965-9773(92)90074-8
  • [7] MECHANICAL-BEHAVIOR OF NANOCRYSTALLINE CU AND PD
    NIEMAN, GW
    WEERTMAN, JR
    SIEGEL, RW
    [J]. JOURNAL OF MATERIALS RESEARCH, 1991, 6 (05) : 1012 - 1027
  • [8] PETCH NJ, 1953, J IRON STEEL I, V174, P25
  • [9] POLUKHIN P, 1984, PHYSICAL PRINCIPLES
  • [10] Nanocrystalline Al investigated by transmission electron microscope
    Re, M
    Alvisi, M
    Bonetti, E
    Tapfer, L
    [J]. MICROSCOPY MICROANALYSIS MICROSTRUCTURES, 1995, 6 (5-6): : 673 - 683
12