Publication

On the constitutive behavior of the F82H ferritic/martensitic steel

2001
Journal Articles

Abstract

This paper focuses on the constitutive behavior of the F82H ferritic/martensitic steels internationally investigated in the frame of the fusion material development program. Tensile tests were carried out in the temperature range (80-723 K) at different strain rates. A decomposition of the how stress into a yield stress plus a hardening stress component is proposed. The temperature, strain and strain rate dependence of the stress is discussed based on the current available data. The strain-hardening is calculated and two strain-hardening stages are identified along the deformation curves between the yield stress and the necking instability. Finally, semi-empirical constitutive relations, which are partly based on dislocation mechanics, are derived. (C) 2001 Elsevier Science B.V. All rights reserved.

Official source

https://infoscience.epfl.ch/entities/publication/b8147e11-c014-4c9a-a561-0da905d3a978

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2001
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/b8147e11-c014-4c9a-a561-0da905d3a978

About this result

Related concepts (32)

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 (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.

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.

Related publications (32)

On the constitutive behavior of the F82H ferritic/martensitic steel

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