Publication

Deformation behavior of nanoporous polycrystalline silver. Part I: Microstructure and mechanical properties

Helena Van Swygenhoven, Steven Van Petegem
2017
Journal Articles

Abstract

This work reports on the microstructure and mechanical properties of porous silver films produced with different sintering parameters. The microstructure is investigated by high-resolution ptychographic Xray computed tomography and scanning electron microscopy. The mechanical properties are obtained from constant strain rate tensile tests. It is found that for this class of samples both grain size and ligament diameter have little effect on the magnitude of the yield stress. Instead, a clear correlation is found between strength and porosity. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

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https://infoscience.epfl.ch/entities/publication/3b001812-1473-4b9b-9f53-8126c540dc78

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Helena Van Swygenhoven, Steven Van Petegem
2017
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/3b001812-1473-4b9b-9f53-8126c540dc78

About this result

Related concepts (29)

Deformation (engineering)

In engineering, deformation refers to the change in size or shape of an object. Displacements are the absolute change in position of a point on the object. Deflection is the relative change in external displacements on an object. Strain is the relative internal change in shape of an infinitesimally small cube of material and can be expressed as a non-dimensional change in length or angle of distortion of the cube. Strains are related to the forces acting on the cube, which are known as stress, by a stress-strain curve.

Stress–strain curve

In engineering and materials science, a stress–strain curve for a material gives the relationship between stress and strain. It is obtained by gradually applying load to a test coupon and measuring the deformation, from which the stress and strain can be determined (see tensile testing). These curves reveal many of the properties of a material, such as the Young's modulus, the yield strength and the ultimate tensile strength. Generally speaking, curves representing the relationship between stress and strain in any form of deformation can be regarded as stress–strain curves.

Deformation (physics)

In physics and continuum mechanics, deformation is the transformation of a body from a reference configuration to a current configuration. A configuration is a set containing the positions of all particles of the body. A deformation can occur because of external loads, intrinsic activity (e.g. muscle contraction), body forces (such as gravity or electromagnetic forces), or changes in temperature, moisture content, or chemical reactions, etc. Strain is related to deformation in terms of relative displacement of particles in the body that excludes rigid-body motions.

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Deformation behavior of nanoporous polycrystalline silver. Part I: Microstructure and mechanical properties

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