A systematic approach to design against wear for Powder Metallurgy (PM) steel parts: The case of dry rolling–sliding wear

Cristofolini, I.; Molinari, A.; Straffelini, Giovanni; Muterlle, Palloma Vieira

doi:10.1016/j.matdes.2010.11.033

Cited by 12 publications

(8 citation statements)

References 24 publications

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“…Straffelini [13], who claimed that the damage mechanisms of PM materials were controlled by large-and small-scale plastic deformations, also used a model to identify the damage mechanisms of PM materials under rollingsliding contact. Cristofolini [14] used dry rolling-sliding contact to analyze the wear mechanisms of PM materials, characterizing porosity under different manufacturing parameters to propose a design methodology for determining the mechanical properties of PM steel materials. Hoffman [15] endurance limit, which affects the development of new, high-load structural parts such as planetary gears and camshaft lobes.…”

Section: Introductionmentioning

confidence: 99%

A pin-on-disc study of the tribology characteristics of sintered versus standard steel gear materials

Sosa

Olofsson

2015

Wear

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a b s t r a c tThough powder metallurgy (PM) allows manufacturing of complex components, including gears, we lack knowledge of the tribological performance of PM versus standard steel gear materials. Using a pin-ondisc machine, we simulate the sliding part of gear tooth contact in boundary and mixed lubricated regions, comparing the tribological characteristics of two sintered gear materials with those of a standard gear material. The comparison considered damage mechanisms, wear, and friction between these materials in different configurations (i.e., standard versus standard, sintered versus sintered, and sintered versus standard). The results indicate that, for pairings of the same gear materials, i.e., RS-RS (16MnCr5), AQ-AQ (Distaloy AQ þ 0.2% C), and Mo-Mo (Astaloy 85Mo þ0.2% C), RS has a lower friction coefficient. For PM and RS combinations, both PM pins have lower friction coefficients with RS disc material than do RS pins with PM disc materials. For the wear coefficient, at low and high speeds, RS pins always display better wear resistance than do AQ or Mo pins because of their high hardness and compacted microstructure. For RS-PM combinations, Mo pins display higher wear resistance than do AQ pins because their larger and more numerous pores enable good lubrication. Pins in the Mo-RS combination displayed the highest wear resistance, mainly because the pores in Mo discs hold lubricant, lubricating the contact surface and preventing adhesive wear. For the RS pin in the Mo-RS combination and the AQ pin in RS-AQ, the damage mechanism is slight adhesive wear and scuffing. For pins in the PM-PM, RS-PM, AQ-RS, and RS-RS combinations, the damage mechanism is a heavier scuffing-type adhesive wear.

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Section: Introductionmentioning

confidence: 99%

A pin-on-disc study of the tribology characteristics of sintered versus standard steel gear materials

Sosa

Olofsson

2015

Wear

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“…An additional damage mechanism in lubricated rolling–sliding is surface plastic deformation promoted by the surface stresses [7]. It may occur when the resistance to plastic deformation of the metallic matrix is lower than the surface stress and may lead to either surface densification and/or to the formation of surface cracks, impairing in both cases the surface integrity and microgeometry.…”

Section: Introductionmentioning

confidence: 99%

Influence of the microstructure on the subsurface and surface damage during lubricated rolling–sliding wear of sintered and sinterhardened 1.5%Mo–2%Cu–0.6%C steel: theoretical analysis and experimental investigation

Mekonone

Pahl²,

Molinari

2018

Powder Metallurgy

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The influence of the microstructure on density on the resistance to subsurface and surface damage, during lubricated rolling-sliding wear of a 1.5%Mo-2%Cu-0.65%C sintered and sinterhardened steel, was investigated. The nucleation of subsurface contact fatigue cracks and the occurrence of surface plastic deformation due to surface stresses were studied through a theoretical analysis and confirmed through wear tests. The expected positive effect of density and sinterhardening was confirmed. Moreover, the resistance of the steel to the two damage mechanisms investigated depends on the microstructural heterogeneity. The theoretical model for subsurface and for surface damage may be used to predict the resistance of the material but, depending on the distribution of the microstructural constituents, either a local or a mean approach in defining the properties of the metallic matrix has to be used.

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“…Different types of coatings by various techniques were developed [4,8,9,10], and new alloyed steels were produced [11,12], in order to increase tools' life span. Researchers develop procedures in designing-against-wear PM components [13]. Studies regarding the machinability of PM steels lead to the ascertainment of the influence of machining parameters and tool edge geometry [14] and to the clarification of the effect of chemical composition on workability [15].…”

Section: Introduction and Backround Informationmentioning

confidence: 99%

Failure analysis of an EDM machined mold-printing die used for the production of truck spare parts

Leptidis

Medrea

Chicinaş

2016

Engineering Failure Analysis

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A systematic approach to design against wear for Powder Metallurgy (PM) steel parts: The case of dry rolling–sliding wear

Cited by 12 publications

References 24 publications

A pin-on-disc study of the tribology characteristics of sintered versus standard steel gear materials

A pin-on-disc study of the tribology characteristics of sintered versus standard steel gear materials

Influence of the microstructure on the subsurface and surface damage during lubricated rolling–sliding wear of sintered and sinterhardened 1.5%Mo–2%Cu–0.6%C steel: theoretical analysis and experimental investigation

Failure analysis of an EDM machined mold-printing die used for the production of truck spare parts

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