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Title: Evolution of the Residual Stresses by Stress Rolling
Author: Eckehard Müller
Source: Conf Proc: ICSP-9 (pg 436-441)
Publication year 2005
Document number: 2005121
Number of pages: 6
Abstract:
ABSTRACT
In this investigation, flat samples of spring steel (martensitic structure) with a tensile strength of Rm = 1420 N/mm² were rolled without load and stress rolled (preload:
300; 600; 1200 N/mm²). The samples were rolled with the help of a ball. The residual stress profiles are shown along and perpendicular to the rolling direction. In
dependence of the preload (along the rolling direction) an increase of the compressive residual stresses is obtained. At a preload of 1200 N/mm² a nearly symmetrical angular
state of the residual stress at the surface is reached at a level of -1000 N/mm². Perpendicular to the rolling direction the induced residual stresses are nearly independent
of the preload. A comparison of the residual stresses with stress peened samples is made to show the higher quality of the stress rolling process in relation to stress
peening.
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