Experimental identification and validation of the plastic wave approach in hot forging of steels

Vidal‐Sallé, Emmanuelle; Dubois, A.; Dubar, Mirentxu; Dubar, Laurent; Boyer, Jean‐Claude

doi:10.1016/j.wear.2011.06.019

Cited by 4 publications

(1 citation statement)

References 19 publications

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“…These results confirm that the profile best adapted for the theory of the plastic wave is a triangular profile of the same height as indicated in Challen and Oxley [25] and other reported works [26].…”

Section: Resultssupporting

confidence: 90%

Mesoscopic comparison of interface tool/workpiece for simulation by FEM of EN AW 1350 bulk forming alloy

Kherouf

Boutabba

Bey

et al. 2015

Mechanics & Industry

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This paper presents an improved numerical simulation of bulk metal forming processes. It takes into the account the advanced formalism of large displacements and large deformations. Also, the interface workpiece formalism is considered. Metallographic studies are conducted to determine the evolution of the micro hardness as a function of annealing time and that to characterize accurately the plastic range of aluminum alloy for a range of plasticity 160%. The obtained results of metallographic studies are used to simulate a upsetting under the friction law of the plastic wave. A numerical simulation by FEM of bulk forming alloy is carried out by replacing the real profile of the surface roughness by two triangular profiles, the first has the same height as the real profile and the second has the same area then by a trapezoidal profile of the same height. The obtained results are compared to Challen and Oxley results in order to validate the triangular profile used in the friction model of plastic wave.

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Section: Resultssupporting

confidence: 90%

Mesoscopic comparison of interface tool/workpiece for simulation by FEM of EN AW 1350 bulk forming alloy

Kherouf

Boutabba

Bey

et al. 2015

Mechanics & Industry

View full text Add to dashboard Cite

show abstract

Lubrication and Wear in Forging

Clarke¹,

Tyne²

2017

Friction, Lubrication, and Wear Technology

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Both hot and cold forgings are batch-type processes in which steady-state conditions are never fully achieved and the initial lubricant supply must perform adequately for the duration of the operation. This article discusses methods to measure lubricant effectiveness and wear. It describes the mixed-film lubrication and solid film lubrication in cold forging, as well as solid film lubrication and thick film lubrication in hot forging. The article reviews the factors affecting abrasive wear: die hardness, workpiece temperature, and lubrication and die temperature. It concludes with information on ways to improve resistance to abrasive wear.

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Surfaces and Friction

2023

Schey’s Tribology in Metalworking

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This chapter examines the surface interactions that occur during metal forming operations at both the macroscopic and microscopic scale. It describes the measurement and characterization of surface profiles based on form error, waviness, and roughness. It explains how workpiece surfaces become rougher or smoother due to the effects of deformation, tooling interactions, and lubricant film thickness. It familiarizes readers with the concept of nominal contact, the role of asperities, and the effects of interface pressure, plasticity index, shear stress, and bulk strain rate. It also reviews the two basic friction rules applicable to metal forming and presents advanced friction models that account for the transition between Coulomb and Tresca behavior and the effects of lubrication.

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Experimental identification and validation of the plastic wave approach in hot forging of steels

Cited by 4 publications

References 19 publications

Mesoscopic comparison of interface tool/workpiece for simulation by FEM of EN AW 1350 bulk forming alloy

Mesoscopic comparison of interface tool/workpiece for simulation by FEM of EN AW 1350 bulk forming alloy

Lubrication and Wear in Forging

Surfaces and Friction

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