Residual Stress State Characterization of Machined Components by X-ray Diffraction and Multiparameter Micromagnetic Methods

Épp, Jérémy; Hirsch, Thomas

doi:10.1007/s11340-009-9231-z

Cited by 15 publications

(13 citation statements)

References 17 publications

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“…The sensor contains a brace coil for the primary magnetisation with 30 mm in length and 11 mm in width, a sensor (8 mm68 mm) for the acquisition of the parameters and a Hall-effect probe for the control and the measurement of the magnetic field. More details about the measurement parameters can be found elsewhere [10]. The calibration strategy used X-ray diffraction data from 10 consecutive positions of each single ring.…”

Section: Measurements With the Micromagnetic Methodsmentioning

confidence: 99%

Characterisation of the carrier of distortion potential “residual stresses” in the collaborative research centre “distortion engineering”

Épp¹,

Hirsch

2012

Materialwissenschaft Werkst

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Charakterisierung des Verzugspotenzialträgers "Eigenspannungen" im Sonderforschungsbereich "Distortion Engineering" J. Epp, T. HirschAs residual stresses are already known as important distortion potentials, a comprehensive characterisation of residual stress distributions is required. In order to get this information, several techniques that are often complementary have to be used. Every method has its own advantages but also presents difficulties. In this paper, three methods (X-ray diffraction, neutron diffraction and micromagnetic methods) used for the characterisation of residual stress states of different components will be presented. Some basics about theory and application of the methods are given. Concrete examples and results are shown. In particular, residual stress characterisation of bearing rings made from the steel grade AISI52100 and carburized discs made from AISI5120 are presented. A comparison of the methods with their specific advantages and disadvantages is made.Keywords: X-ray diffraction / neutron diffraction / micromagnetic method / residual stresses / Eigenspannungen wurden bereits als wichtige Verzugspotenzialträger identifiziert und es ist deswegen von hoher Wichtigkeit, die Verteilung dieser Eigenspannungen innerhalb eines Bauteils zu charakterisieren. Um an diese Informationen heranzukommen, stehen mehrere Möglich-keiten zur Verfügung, welche sich oft gut ergänzen. Jede Messmethode hat eigene Vorteile, bringt jedoch ebenfalls Schwierigkeiten mit sich. In diesem Artikel werden drei Methoden zur Eigenspannungsbestimmung vorgestellt (Röntgen-beugung, Neutronenbeugung und ein mikromagnetisches Verfahren), welche für die Charakterisierung von unterschiedlichen Bauteilen angewendet wurden. Einige Grundinformationen über die jeweiligen Verfahren werden zunächst vorgestellt und im Anschluss konkrete Anwendungsbeispiele gezeigt. Insbesondere werden Messungen an Wälzlagerringen aus dem Stahl AISI52100 sowie an Scheiben als Modellbauteil für Zahnräder aus dem Einsatzstahl AISI5120 vorgestellt. Anschließend werden die Methoden verglichen und hinsichtlich ihrer Vor-und Nachteile bewertet.Schlüsselwörter: Röntgenbeugung / Neutronenbeugung / mikromagnetisches Verfahren / Eigenspannungen /

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Section: Measurements With the Micromagnetic Methodsmentioning

confidence: 99%

Characterisation of the carrier of distortion potential “residual stresses” in the collaborative research centre “distortion engineering”

Épp¹,

Hirsch

2012

Materialwissenschaft Werkst

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“…During heat treatment, the ring was batched on a star [9] with a defined position regarding an identification mark. To reduce oxidation of the ring surface, a permanent nitrogen flow was established in the furnace.…”

Section: B Heat Treatmentsmentioning

confidence: 99%

“…[7,[9][10][11] On the contrary, axial residual stresses are homogeneous along the periphery and have almost no influence on the out of roundness. [10,11] Consequently, the accent of the investigations is set on the tangential residual stresses.…”

Section: Initial State Before Heat Treatmentmentioning

confidence: 99%

“…[1][2][3][4][5][6] The study of these phenomena by experimental investigations and computer simulation is the main objective of the Collaborative Research Centre course SFB 570 Distortion Engineering at the University of Bremen. [1][2][3][4][5][6][7][9][10][11][12] Residual stresses are well-known influencing factors in the distortion of parts, and their effects have been studied for decades. [2] Prior studies have shown the influence of machining steps and their parameters on the residual stress fields introduced at the surface of rings.…”

Section: Introductionmentioning

confidence: 99%

“…[2] Prior studies have shown the influence of machining steps and their parameters on the residual stress fields introduced at the surface of rings. [7][8][9][10][11] These results point out that more than the level of residual stresses, the inhomogeneity of their distributions within a ring is the deciding parameter concerning the resulting distortion. Furthermore, the relief of the machining-induced residual stresses during heat treatment is of great importance.…”

Section: Introductionmentioning

confidence: 99%

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Interdependence of Distortion and Residual Stress Relaxation of Cold-Rolled Bearing Rings During Heating

Épp¹,

Surm²,

Kovac³

et al. 2010

Metall Mater Trans A

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This article discusses the distortion behavior during heating of bearing rings produced by cold rolling. The residual stress relaxation was characterized intensively and correlated to the distortion behavior. In the initial state, the rings show compressive residual stresses in tangential and axial direction with almost no variations along the circumference. Because of the cold-rolling process, the entire cross section is affected by residual stresses. The rings present a characteristic size change between the soaking temperatures 773 K and 823 K (500°C and 550°C), which can be correlated with the macroresidual stress relaxation in the core of the rings. Changes in roundness deviation were found, but the amplitude of oval and triangular shape increases continuously until austenitizing temperature is reached. As the macrostress relaxation is already completed at 873 K (600°C), another mechanism should be responsible for these distortions. A correlation between amplitude of the oval shape and decrease of full width at half maximum seems to be present. This may indicate that inhomogeneous recrystallization happens along the circumference of the rings. A triangular shape may result from the influence of the loading tool used as rings are positioned on three contact points during the stress relief treatment.

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Complementary Methods for Assessment of Residual Stress Fields Induced by Rotary Swaging of Steel Bars

et al. 2021

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Residual Stress State Characterization of Machined Components by X-ray Diffraction and Multiparameter Micromagnetic Methods

Cited by 15 publications

References 17 publications

Characterisation of the carrier of distortion potential “residual stresses” in the collaborative research centre “distortion engineering”

Characterisation of the carrier of distortion potential “residual stresses” in the collaborative research centre “distortion engineering”

Interdependence of Distortion and Residual Stress Relaxation of Cold-Rolled Bearing Rings During Heating

Complementary Methods for Assessment of Residual Stress Fields Induced by Rotary Swaging of Steel Bars

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