Ring rolling process simulation for geometry optimization

Franchi, Rodolfo; Prete, Antonio Del; Donatiello, Iolanda; Calabrese, M.

doi:10.1063/1.5008223

Cited by 2 publications

(1 citation statement)

References 5 publications

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“…Nowadays, numerical simulations are crucial to investigate the behavior of materials under several mechanical conditions, with evident advantages in terms of time and cost saving during the process design phase [1,2]. Among these simulations, finite element simulation permits to study some aspects of the process that are difficult to investigate experimentally.…”

Section: Introductionmentioning

confidence: 99%

On the appearance of fractional operators in non-linear stress–strain relation of metals

Pinnola

Zavarise

Prete

et al. 2018

International Journal of Non-Linear Mechanics

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Finding an accurate stress-strain relation, able to describe the mechanical behavior of metals during forming and machining processes, is an important challenge in several fields of mechanics, with significant repercussions in the technological field. Indeed, in order to predict the real mechanical behavior of materials, constitutive laws must be able to take into account elastic, viscous and plastic phenomena. Most constitutive models are based on empirical evidence and/or theoretical approaches, and provide a good prediction of the mechanical behavior of several materials.Here we present a non linear stress-strain relation based on fractional operators. The proposed constitutive law is based on integral formulation, and takes into account the viscoelastic behavior of the material and the inelastic phenomenon that appears when the stress reaches a particular yielding value. A specific case of the proposed constitutive law for imposed strain history is used to fit experimental data obtained from tensile tests on two kind of metal alloys. A best-fitting procedure demonstrates the accuracy of the proposed stress-strain relation and its results are compared to those obtained with some classical models. We conclude that the proposed model provides the best results in predicting the mechanical behavior for low and high values of stress/strain.

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Section: Introductionmentioning

confidence: 99%

On the appearance of fractional operators in non-linear stress–strain relation of metals

Pinnola

Zavarise

Prete

et al. 2018

International Journal of Non-Linear Mechanics

View full text Add to dashboard Cite

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Chapter 4 | Steelmaking, Casting, Rolling—Air (Open) Melt Steel Grades

Beswick¹

2022

Rolling Bearing Steel: Design, Technology, Testing and Measurements

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Bearing steel technologists need to be aware of air-melt bearing steelmaking process developments and the market demands for cheaper and better rolling bearings, and reduced CO2 emissions. Primary steelmaking in electric arc or basic oxygen furnaces is described together with the development of linked or separate ladle refining and vacuum degassing technologies. The choice of aluminum or silicon (nonaluminum) deoxidation is explained as a function of the applied casting methodology, end product requirement, and the prevailing ethos. The variety of steelmaking combinations are explained and relationships of the processes with the metallurgical quality illustrated. The technologies applied in bearing steel casting operations have a profound effect on quality and costs and this is described. High carbon bearing steel compositions present special problems with respect to segregation and a need for homogenization treatments. Continuous casting of bearing steels is established, but ingot casting is required for higher alloyed steels. Ingot casting remains an excellent way of making high-quality bearing steels. Both billet and bloom continuous casting are economically attractive provided the bearing steels in question can be cast in suitable sequences. The use of post-casting homogenization treatments are explained particularly for the large-size bearing steel grades produced by radial-axial hot ring rolling. Control of hot-working process temperatures and adiabatic heating effects, particularly for high carbon-alloy steels, is described. Nondestructive testing cannot detect all internal metallurgical defects which means that hot ring rolling must not introduce undetectable, or difficult to detect, internal void defects. It is explained that careful homogenization of steels for radial and axial ring rolling needs to be performed in order to ensure that the rings have full metallurgical integrity (i.e., they are free of voids/porosity).

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Ring rolling process simulation for geometry optimization

Cited by 2 publications

References 5 publications

On the appearance of fractional operators in non-linear stress–strain relation of metals

On the appearance of fractional operators in non-linear stress–strain relation of metals

Chapter 4 | Steelmaking, Casting, Rolling—Air (Open) Melt Steel Grades

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