New Improvements in Materials Used to Manufacture Powder Forged Connecting Rods

Ilia, Edmond; Tutton, Kevin; O’Neill, Michael W.; Lanni, G.; Letourneau, Steven

doi:10.4271/2007-01-1556

Cited by 8 publications

(4 citation statements)

References 5 publications

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“…6, respectively. As seen, the relationships of lnσ-lnε, lnσ-lnζ and lnσ-T -1 can be expressed by the quadratic polynomials as: lnσ ε =a 1 +a 2 lnε+a 3 (lnε) 2 (1)…”

Section: Resultsmentioning

confidence: 99%

“…In this equation, y is lnσ; β 0 , β 1 , ……β 9 are the material constants; x 1 , x 2 , …… x 9 are 10000/T, lnζ, lnε, (10000/T) 2 , (lnζ) 2 , (lnε) 2 , lnζ×(10000/T), lnε×(10000/T), lnζ×lnε, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…As one of the important near net forming technology used to manufacture high strength powder metallurgy parts substituting the conventional casting-and-forging ones, powder forging has been wildly applied [1,2]. It comprises the preparation of preform through conventional pressing and sintering processes and a subsequent closed-die forging in order to obtain the desired final shape and closed full density [3].…”

Section: Introductionmentioning

confidence: 99%

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Flow and Densification Behaviors of Sintered P/F-10C50 Steel under Hot Compression

Guo

et al. 2016

MSF

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The hot deformation and densification behaviors of sintered P/F-10C50 steel were investigated by hot compression tests on Gleeble-1500 thermal mechanical simulator at the temperature ranging from 900 °C to 1000 °C and the strain rate ranging from 0.1 s-1 to 10 s-1. The flow and densification characteristics of the tested specimens at different deformation temperatures and strain rates were studied. The flow stress of the sintered steel persistently increases until the end of the test as the result of matrix and geometric work hardening. The higher deformation temperature and strain rate are conductive to the healing of the pores and promote the densification of the sintered steel, while the higher deformation temperature and lower strain rate impede the densification. The constitutive equation of the sintered steel is established by the means of stepwise regression. The flow stresses predicted by the established constitutive equation are in good agreement with the experimental values, and the correlation coefficient (R) and the average absolute relative error (AARE) are 0.9931 and 3.52%, respectively. These results demonstrate the hot deformation behaviors of the sintered P/F-10C50 steel are excellently predicted by the established constitutive equation.

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“…6, respectively. As seen, the relationships of lnσ-lnε, lnσ-lnζ and lnσ-T -1 can be expressed by the quadratic polynomials as: lnσ ε =a 1 +a 2 lnε+a 3 (lnε) 2 (1)…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Flow and Densification Behaviors of Sintered P/F-10C50 Steel under Hot Compression

Guo

et al. 2016

MSF

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“…The optimization of the chemical composition of Fe-Cu-C alloys for optimum performance resulted in higher copper and carbon levels 1) than in the commonly used materials to manufacture connecting rods, namely PF-11C50 and PF-11C60 2) . Among the HS materials, HS170M (3.25 % Cu, 0.64 % as-forged C, 0.32 % MnS, Bal.…”

Section: Introductionmentioning

confidence: 99%

Mass Reduction Opportunities Offered by Powder-Forged Connecting Rods

Ilia¹

2016

J. Jpn. Soc. Powder Powder Metallurgy

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The advent of direct injection turbocharged engines has increased the need for higher performance connecting rods, able to withstand higher compressive loads in operation. In this respect, the compressive yield strength of the materials used to manufacture connecting rods is of paramount significance as it becomes the most important design factor. Connecting rods are currently designed using mechanical properties obtained at room temperature; however, the operating environment in an engine can have negative effects on their performance, as the strength of most materials declines at higher temperatures. Nevertheless, tests conducted at engine operating temperatures have shown an improvement in mechanical properties of the materials used to manufacture powder-forged connecting rods as a result of copper precipitation strengthening. Scanning and transmission electron microscopy were employed to investigate nano precipitates of copper in the specimens tested at higher temperatures as well as in connecting rods that have been running in engines for appreciable amounts of time. In light of these results, there is an opportunity to reduce the cross section in the I-beam of powder-forged connecting rods by using in design the higher compressive yield strength values obtained at engine operating temperatures, thus resulting in mass savings.

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Influences of impact energy on the densification and mechanical properties of powder metallurgical Fe–C–Cu preforms during a powder-forged process

Guo

et al. 2020

Journal of Materials Research and Technology

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New Improvements in Materials Used to Manufacture Powder Forged Connecting Rods

Cited by 8 publications

References 5 publications

Flow and Densification Behaviors of Sintered P/F-10C50 Steel under Hot Compression

Flow and Densification Behaviors of Sintered P/F-10C50 Steel under Hot Compression

Mass Reduction Opportunities Offered by Powder-Forged Connecting Rods

Influences of impact energy on the densification and mechanical properties of powder metallurgical Fe–C–Cu preforms during a powder-forged process

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