Publication

Measurement of residual stresses around the notch of tensile specimens of the high-Cr tempered martensitic steel F82H-mod

Philippe Spätig, Steven Van Petegem, Nazar Ilchuk
2014
Conference Papers

Abstract

Residual elastic strains were measured by neutron diffraction using POLDI facility at PSI-Switzerland on pre-loaded notched flat tensile specimens made of the high-chromium tempered martensitic steel F82H-mod steel. To calculate the residual stresses using Hooke’s equation, three perpendicular components of the residual strain field were determined. The measured residual strains and stresses were compared with those deduced from finite element simulation calculations. A very good agreement was found for the strains in the loading plane of the specimen while a somewhat larger discrepancy was observed for the out-of-plane residual strain, which was tentatively attributed to an uncertainty in the initial lattice spacing in that direction

Official source

https://infoscience.epfl.ch/entities/publication/d77dffe8-6239-4948-842b-284a1acefb90

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Philippe Spätig, Steven Van Petegem, Nazar Ilchuk
2014
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/d77dffe8-6239-4948-842b-284a1acefb90

About this result

Related concepts (13)

Yield (engineering)

In materials science and engineering, the yield point is the point on a stress-strain curve that indicates the limit of elastic behavior and the beginning of plastic behavior. Below the yield point, a material will deform elastically and will return to its original shape when the applied stress is removed. Once the yield point is passed, some fraction of the deformation will be permanent and non-reversible and is known as plastic deformation.

Elastic modulus

An elastic modulus (also known as modulus of elasticity) is the unit of measurement of an object's or substance's resistance to being deformed elastically (i.e., non-permanently) when a stress is applied to it. The elastic modulus of an object is defined as the slope of its stress–strain curve in the elastic deformation region: A stiffer material will have a higher elastic modulus. An elastic modulus has the form: where stress is the force causing the deformation divided by the area to which the force is applied and strain is the ratio of the change in some parameter caused by the deformation to the original value of the parameter.

Viscoelasticity

In materials science and continuum mechanics, viscoelasticity is the property of materials that exhibit both viscous and elastic characteristics when undergoing deformation. Viscous materials, like water, resist shear flow and strain linearly with time when a stress is applied. Elastic materials strain when stretched and immediately return to their original state once the stress is removed. Viscoelastic materials have elements of both of these properties and, as such, exhibit time-dependent strain.

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Measurement of residual stresses around the notch of tensile specimens of the high-Cr tempered martensitic steel F82H-mod

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