Numerical investigation of residual thermal stresses in welded joints of heterogeneous steels with account of technological features of multi-pass welding

Krektuleva, R. A.; Cherepanov, O. I.; Cherepanov, Roman O.

doi:10.1016/j.apm.2016.10.005

Cited by 10 publications

(2 citation statements)

References 14 publications

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“…Due to different thermal expansion coefficients of the materials, delayed cooling of the subsurface and core, as well as local structural transformations limited to the surface layer; residual stresses were caused after forging and the heat treatment process, which were modified by subsequent machining of the hybrid component [22,23]. Residual stresses have a significant influence on the operating behavior and therefore the lifetime of a component.…”

Section: Residual Stress Measurementsmentioning

confidence: 99%

Investigations on Tailored Forming of AISI 52100 as Rolling Bearing Raceway

Coors

Mildebrath

Büdenbender

et al. 2020

Metals

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Hybrid cylindrical roller thrust bearing washers of type 81212 were manufactured by tailored forming. An AISI 1022M base material, featuring a sufficient strength for structural loads, was cladded with the bearing steel AISI 52100 by plasma transferred arc welding (PTA). Though AISI 52100 is generally regarded as non-weldable, it could be applied as a cladding material by adjusting PTA parameters. The cladded parts were investigated after each individual process step and subsequently tested under rolling contact load. Welding defects that could not be completely eliminated by the subsequent hot forming were characterized by means of scanning acoustic microscopy and micrographs. Below the surface, pores with a typical size of ten µm were found to a depth of about 0.45 mm. In the material transition zone and between individual weld seams, larger voids were observed. Grinding of the surface after heat treatment caused compressive residual stresses near the surface with a relatively small depth. Fatigue tests were carried out on an FE8 test rig. Eighty-two percent of the calculated rating life for conventional bearings was achieved. A high failure slope of the Weibull regression was determined. A relationship between the weld defects and the fatigue behavior is likely.

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Section: Residual Stress Measurementsmentioning

confidence: 99%

Investigations on Tailored Forming of AISI 52100 as Rolling Bearing Raceway

Coors

Mildebrath

Büdenbender

et al. 2020

Metals

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“…The joining of the materials is carried out by a friction welding process. Due to different expansion coefficients of the materials, residual stresses are caused during cooling, which are altered by subsequent machining of the component [1,2]. The currently used diffractometric angle dispersive sin² method has the disadvantage that an electrolytic material removal is necessary for a depth resolved residual stress measurement.…”

Section: Introductionmentioning

confidence: 99%

Non-Destructive Determination of Residual Stress Depth Profiles of Hybrid Components by Energy Dispersive Residual Stress Measurement

Breidenstein

Denkena

Mörke

et al. 2017

KEM

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Through the combination of two or more materials to one compound, for example high-strength steel and aluminum, hybrid massive components can be manufactured, whose properties are specially adapted to the respective application. One of the challenges is the joining zone which is influenced by machining induced residual stresses. In order to examine the residual stress modifications by the machining process and in addition to analyze the influence of these residual stress gradients on the lifespan of hybrid components a non-destructive method of measuring depth-resolved residual stress is necessary. Therefore, an innovative energy dispersive X-ray measurement technique is used in the collaborative research center 1153 (CRC 1153). In this study the suitability of the method is examined by comparing the results with the angle dispersive method both in machined front surface of mono materials and hybrid shafts. A parametrical study shows the possibility to get greater depth information by variation of the measuring parameters Bragg angle, tilting angle, collimator and current. In addition, the results of the energy dispersive method combined with electrolytic removal is shown. Based on these results the evaluation of the reliability and reproducibility of energy dispersive residual stress measurements is completed.

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Numerical Simulation of Residual Stress Induced by Welding of Steel-Aluminum Transition Joint

Kowalski

Böhm

2019

Lecture Notes in Mechanical Engineering

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Numerical investigation of residual thermal stresses in welded joints of heterogeneous steels with account of technological features of multi-pass welding

Cited by 10 publications

References 14 publications

Investigations on Tailored Forming of AISI 52100 as Rolling Bearing Raceway

Investigations on Tailored Forming of AISI 52100 as Rolling Bearing Raceway

Non-Destructive Determination of Residual Stress Depth Profiles of Hybrid Components by Energy Dispersive Residual Stress Measurement

Numerical Simulation of Residual Stress Induced by Welding of Steel-Aluminum Transition Joint

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