Origins and Resulting Effects of Internal Stresses in Martensite
Bevis Hutchinson, Fredrik Lindberg, Peter A. Lynch
Abstract
This paper aims to present new observations and relate these to other recent findings concerning the influence of local micro-stresses (Type II residual stresses) on the behaviour of martensitic steels. A major source of these stresses is the shearing that accompanies phase transformation in individual austenite grains and which is blocked by constraint from the surrounding matrix. Residual stresses are the principal reason for early plasticity and gradual yielding during tensile testing of martensite.
Topics & Concepts
MartensiteAusteniteResidual stressMaterials sciencePlasticityShearing (physics)MetallurgyUltimate tensile strengthDiffusionless transformationComposite materialMicrostructureMicrostructure and Mechanical Properties of SteelsMetallurgy and Material FormingWelding Techniques and Residual Stresses