Evaluation of the error of the light beam incidence on concave surfaces in 3D roughness parameters using optical interferometry

Vale, João Luiz do; Beltrão, Victor de Cerjat; Silva, Carlos Henrique da; Pintaúde, Giuseppe

doi:10.1016/j.measurement.2018.02.022

Cited by 8 publications

(5 citation statements)

References 16 publications

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“…A parameter of 3D surface characteristic microtopography was provided to present more visualized information by using the function of 3D surface roughness analysis in the Vision Software. The root mean square deviation (RMS) parameter (Sq) was employed to evaluate the effect of the deep cryogenic treatment on the worn surface roughness [23,24], which is defined as the following Equation (2) [25]:…”

Section: Worn Surface Observationmentioning

confidence: 99%

Effects of Deep Cryogenic Treatment on Wear Resistance and Structure of GB 35CrMoV Steel

Yao

Zhou

2018

Metals

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Wear resistance of metallic materials can be effectively improved by the deep cryogenic treatment. In this study, different deep cryogenic treatment conditions were considered, with different soaking durations between quenching and tempering. The main objective is investigating the effects of deep cryogenic treatment and exploring the relationship between the mechanical properties and the microstructure of GB 35CrMoV steel. Hardness and relative wear ratios of samples were evaluated by the Vickers-hardness test and the pin-on-disk wear test, respectively. Worn surface was characterized by a non-contact optical surface profiler. Microstructures were studied by scanning electron microscope (SEM) and X-ray diffraction (XRD). Significant improvements in hardness and wear resistance are observed for higher cryogenic soaking times; the root mean square deviation (RMS) parameter (Sq) was employed to evaluate the effect of deep cryogenic treatment on the worn surface roughness; the improvements were ascribed to the precipitated carbides. The mechanism can be interpreted not only as the promoted effect of deep cryogenic treatment in the decomposition kinetics of martensite, but also as the acceleration on the Ostwald ripening process.

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Section: Worn Surface Observationmentioning

confidence: 99%

Effects of Deep Cryogenic Treatment on Wear Resistance and Structure of GB 35CrMoV Steel

Yao

Zhou

2018

Metals

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“…Hybrid parameters are also important in surface engineering because they are concerned with both height (amplitude) and plane direction (spacing). These parameters are derived from mathematical models that depict both spatial and vertical characteristics of the surface and are essential for quantifying wear in tribological tests 62,63 . The hybrid parameter may be affected by any changes in either amplitude or spacing.…”

Section: Resultsmentioning

confidence: 99%

“…These parameters are derived from mathematical models that depict both spatial and vertical characteristics of the surface and are essential for quantifying wear in tribological tests. 62,63 The hybrid parameter may be affected by any changes in either amplitude or spacing. As shown in Table 6, the two-hybrid parameters, that is, mean slope of profile (Δ a ) and RMS slope of profile (Δ q ) are investigated in this study.…”

Section: Extreme Pressure (Ep) Performance Of Greasesmentioning

confidence: 99%

Tribological evaluation of PAO 100 oil‐based lithium greases with chemically functionalized nanoadditives

Kumar

Harsha

Rawat

2023

Lubrication Science

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The lubricating greases employed in this study were formulated with polyalphaolefin (PAO) 100 as the base oil and 12‐lithium hydroxystearate as the thickener. The sol–gel method was used to produce the LaF3 nanoadditives. The oleic acid‐treated LaF3 (i.e., OA‐LaF3) and carboxylic acid‐treated MWCNTs (i.e., COOH‐MWCNTs) were blended in the formulated grease samples and used as nanoadditives. The detailed microstructural and chemical properties of chemically treated nanoadditives were investigated using HR‐TEM, XRD, FTIR and XPS analyses. Using a four‐ball tester, the effect of different concentrations of nanoadditives on the tribo‐performance of greases was investigated. Tribo‐test results revealed the role of nanoadditives in PAO‐based grease lubrication performance. COOH‐MWCNTs and OA‐LaF3 nanoadditives outperformed PAO grease in terms of physicochemical and tribo‐performance for steel‐steel tribo‐pair. The improved tribo‐performance is attributed to the formation of tribo‐film on the contact interfaces via nanoadditives. The development of tribo‐film was confirmed by XPS analysis of worn surfaces.

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“…As a traditional and widely method, stylus method can present an alternative method to determine the approximate size scratch. Other measuring methods such as 3D mapping technology 38,39 and powder filling method 11 are also recommend for micro scratch to guarantee prediction accuracy. Multiple scratch on the surface of component is general situation in engineering practice, the principle of measuring the maximum scratch and cross-section should be followed…”

Section: Discussionmentioning

confidence: 99%

On the use of the √area△ and the three-parameter power function to estimate fatigue life of TC17 titanium alloy

Ding

Zhang

2020

Preprint

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This paper examined the ability of [?]area u singthematerialf atigue−lif ecurvesinestimatinghigh−cyclef atiguelif econsideringmicroscratch.U ltra parameterpowerf unction.Reasonableagreementsareobservedbetweenthemodelpredictionsandtheexperimentalvalues.W hatismore, accordingtoth NOMENCLATURE σ t ultimate tensile strength σ s yield stress E Young's modulus HV Vickers hardness m , c material parameter W i width of scratch i D i depth of scratch i R fatigue loading stress ratio √ area fatigue damage parameter for micro scratch σ w fatigue strength σ w, conditional fatigue strength for micro scratch a 0 initial defect size da dN fatigue crack growth rate N f experimental fatigue life N P predicted fatigue life

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Evaluation of the error of the light beam incidence on concave surfaces in 3D roughness parameters using optical interferometry

Cited by 8 publications

References 16 publications

Effects of Deep Cryogenic Treatment on Wear Resistance and Structure of GB 35CrMoV Steel

Effects of Deep Cryogenic Treatment on Wear Resistance and Structure of GB 35CrMoV Steel

Tribological evaluation of PAO 100 oil‐based lithium greases with chemically functionalized nanoadditives

On the use of the √area△ and the three-parameter power function to estimate fatigue life of TC17 titanium alloy

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