Grain size effect on strain-rate dependence of mechanical properties of polycrystalline copper

Foamed plastics have been used in many engineering fields because of their superiority in low density, energy absorption, thermal insulation, and acoustic damping capacities. With foams, it is known that the microstructure of cells directly relates to macroscopic deformation behaviour. However, mechanical properties based on microstructures composed of non-uniform cells have not been fully understood. This study aims to clarify the mechanical properties grounded on microstructures of foamed plastics subjected to dynamic loading. The quasi-static and dynamic compression test was carried out using foamed plastic with anisotropy in the cell structure, then the strain rate dependence of deformation and energy absorption characteristics was investigated. It was confirmed that the local buckling of the cells was the dominant deformation mode in the plastic collapse of the test piece. It was also confirmed that cell buckling was initiated around the middle in the height after the plastic collapse, then propagated to the whole specimen in both the quasi-static and dynamic tests by using digital image correlation. The stress-strain relationships and the amount of absorbed energy showed strain rate dependence owing to the deformation mode in which the local buckling of the cells is dominant.

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Grain size effect of pre- and post-coating treated cemented carbides on PVD films' adhesion and mechanical properties

Materialwissenschaft und Werkstofftechnik ◽

10.1002/mawe.201300178 ◽

2013 ◽

Vol 44 (8) ◽

pp. 697-703 ◽

Cited By ~ 5

Author(s):

K.-D. Bouzakis ◽

N. Michailidis ◽

G. Skordaris ◽

A. Tsouknidas ◽

S. Makrimallakis ◽

...

Keyword(s):

Mechanical Properties ◽

Grain Size ◽

Size Effect ◽

Cemented Carbides ◽

Grain Size Effect

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STRAIN RATE DEPENDENCE ON MECHANICAL PROPERTIES IN SOME COMMERCIAL ALUMINUM ALLOYS

Journal de Physique IV (Proceedings) ◽

10.1051/jp4:1991349 ◽

1991 ◽

Vol 01 (C3) ◽

pp. C3-341-C3-346 ◽

Cited By ~ 3

Author(s):

K. HIGASHI ◽

T. MUKAI ◽

K. KAIZU ◽

S. TSUCHIDA ◽

S. TANIMURA

Keyword(s):

Mechanical Properties ◽

Aluminum Alloys ◽

Strain Rate ◽

Rate Dependence ◽

Strain Rate Dependence

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Grain Size and the Compressive Strength of Ice

Journal of Energy Resources Technology ◽

10.1115/1.3231203 ◽

1985 ◽

Vol 107 (3) ◽

pp. 369-374 ◽

Cited By ~ 12

Author(s):

D. M. Cole

Keyword(s):

Grain Size ◽

Size Effect ◽

Strain Rate ◽

Peak Stress ◽

Applied Strain ◽

Test Material ◽

Strain Rates ◽

Grain Size Effect ◽

Compression Tests ◽

Polycrystalline Ice

This work presents the results of uniaxial compression tests on freshwater polycrystalline ice. Grain size of the test material ranged from 1.5 to 5 mm, strain rate ranged from 10−6 to 10−2 s−1 and the temperature was −5°C. The grain size effect emerged clearly as the strain rate increased to 10−5 s−1 and persisted to the highest applied strain rates. On average, the stated increase in grain size brought about a decrease in peak stress of approximately 31 percent. The occurrence of the grain size effect coincided with the onset of visible cracking. The strength of the material increased to a maximum at a strain rate of 10−3 s−1, and then dropped somewhat as the strain rate increased further to 10−2 s−1. Strain at peak stress generally tended to decrease with both increasing grain size and increasing strain rate. The results are discussed in terms of the deformational mechanisms which lead to the observed behavior.

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Grain Size Effect on the Type VT1-0 Alloy Modified by Aluminum Ion Implantation

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.670.144 ◽

2015 ◽

Vol 670 ◽

pp. 144-151

Author(s):

Irina Kurzina ◽

Alisa Nikonenko ◽

Natalja Popova ◽

Elena L. Nikonenko ◽

Mark Kalashnikov

Keyword(s):

Mechanical Properties ◽

Grain Size ◽

Ion Implantation ◽

Size Effect ◽

Phase State ◽

Grain Size Effect ◽

Significant Modification ◽

Aluminum Ion ◽

Grain Sizes ◽

Aluminum Ions

The paper presents results of investigations of α-Ti microhardness modified by aluminum ions having diverse grain sizes, namely: 0.3 μm, 1.5 μm, and 17 μm. These investigations show that the decrease of the grain size and the additional ion implantation result in the significant modification of the structural and phase state of the alloy and its mechanical properties.

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