Investigation of Deep Cold Rolling Effects on the Bending Fatigue of Brass C38500

Mombeini, Daniel; Atrian, Amir

doi:10.1590/1679-78254317

Cited by 9 publications

(4 citation statements)

References 32 publications

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“…The FE approach is used considerably less-only 10% of the published studies use an FE method (FEM). It should be noted that the FEM has been used more extensively to explore the processes involved in rolling contact, i.e., roller burnishing [4][5][6][7][8][9][10][11][12][13][14][15] and deep rolling [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30] (including the special case of deep rolling-low plasticity burnishing [31][32][33][34][35][36][37]), than for SB study [38][39][40][41][42][43][44][45][46]. When it comes to SB, the case in which the deforming element is a diamond is most often simulated [38,[40][41][42]…”

Section: Literary Surveymentioning

confidence: 99%

Improvement in fatigue strength of 41Cr4 steel through slide diamond burnishing

Maximov

Duncheva

Anchev

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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Slide burnishing (SB) is a static mechanical surface treatment based on the severe plastic deformation of the surface for which the contact between the deforming element and the surface being treated is sliding friction. SB improves the surface integrity of metal structural and machine components dramatically. This paper is devoted to improving the fatigue strength of 41Cr4 steel hourglass-shaped specimens subjected to SB with a spherical-ended deforming diamond via different combinations of basic governing parameters. Since the residual compressive stresses introduced play a significant role for the fatigue behavior of the burnished components, a comprehensive parametric study of the SB process was conducted using fully coupled thermal-stress finite element (FE) simulations. The FE model's adequacy was proven via comparison of the FE results for the residual stresses with X-ray diffraction measurements. The results obtained show that the diamond radius and the burnishing force have the strongest effects on the residual stresses, which, in turn, have a significant influence on the fatigue strength, respectively, fatigue life. An extensive experimental investigation of the effect of the selected SB basic parameters on the fatigue limit of the slide burnished specimens was carried out using Locatti's method. The latter is based on the Palmgren-Miner linear damage hypothesis, which is a particular case of a general cumulative damage theory. A planned experiment was carried out, with the governing factors changed among four levels. Regression analysis of the experimental results was carried out, and a model for predicting the fatigue limit was obtained. Based on the model obtained, a one-purpose optimization was carried out using a genetic algorithm. By means of the optimal basic parameters, the fatigue limit of the processed specimens was increased by 22.7%-from 440 to 540 MPa. The fatigue life increased more than 100 times over after SB with the optimal basic parameters.

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Section: Literary Surveymentioning

confidence: 99%

Improvement in fatigue strength of 41Cr4 steel through slide diamond burnishing

Maximov

Duncheva

Anchev

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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“…One of the MSE methods, deep cold rolling (DCR), is getting attention nowadays as it is a fast, chipless, and economical surface enhancement method applicable to prevailing conventional or computer numerical control (CNC) machine tools. Further producing a deep layer of compression and nanocrystalline microstructure on the surface of samples, it also can lessen the surface roughness of materials and enhance the fatigue life of engineering components without affecting their bulk properties (Ref [22][23][24][25][26][27][28][29][30][31][32][33][34]. There are numerous parameters to be considered, and the effects of each of these parameters are dependent on other variables.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, improving the surface properties of machine components that work under fatigue and corrosion is an effective way to enhance the service life of the components. Although surface alteration by application of the deep-cold-rolling process is quite new, it has received substantial demand due to enhanced residual compressive stress (Ref 29,45) , surface work hardening (Ref 28,46) , surface finish (Ref 18,47) and grain refinement which in turn will have the positive effect on corrosion properties. Therefore, a surface enhancement method improving the surface properties after the machining would be beneficial along with the effective use of the design of experiment to reduce the time and number of experiments to be conducted.…”

Section: Introductionmentioning

confidence: 99%

Surface Properties and Corrosion Behavior of Turn-Assisted Deep-Cold-Rolled AISI 4140 Steel

Prabhu

Sharma

et al. 2020

J. of Materi Eng and Perform

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In this research, the effect of various turn-assisted deep-cold-rolling process parameters on the residual stress, microstructure, surface hardness, surface finish, and corrosion behavior of AISI 4140 steel has been investigated. The examination of the surface morphology of the turned and processed samples was performed by using a scanning electron microscope, energy-dispersive spectroscopy, and atomic force microscopy. Response surface methodology and desirability function approach were used for reducing the number of experiments and finding local optimized conditions for parameters under the study. The results from the residual stress measurements indicate that the rolling force has the highest effect by generating a deeper layer of residual compressive stress. The outcomes of surface hardness and surface finish emphasize that rolling force and number of tool passes are the most significant parameters affecting the responses. Surface studies confirmed the corrosion and its intensity onto the metal surface, and according to atomic force microscopy studies, the surface had become remarkably rough after exposure to the corrosive medium. Improvements in surface microhardness from 225 to 305.8 HV, the surface finish from 4.84 down to 0.261 μm, and corrosion rate from 6.672 down to 3.516 mpy are observed for a specific set of parameters by turn-assisted deep-cold-rolling process. The multiresponse optimization for surface finish and corrosion rate together shows that a ball diameter of 10 mm, a rolling force of 325.75 N, initial roughness of 4.84 µm, and number of tool passes of 3 give better values for the two responses under consideration with composite desirability of 0.9939. Based on the experimental work at the optimum parameter setting, the absolute average error between the experimental and predicted values for the corrosion rate is calculated as 3.2%.

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“…Typically, ductile materials are objects of investigations: cupper, aluminum, magnesium, titanium, tungsten, some their alloys, and ductile steels. Low-plastic alloys are less popular and only several modern works on leaded tin bronze and brass are known through the literature [6,7]. Meanwhile, even low-plastic alloys yield to SPD treatment owing to the specific character of stress-strain state (complex loading path and all-round high pressure).…”

Section: Introductionmentioning

confidence: 99%

Towards the Problem of Construction an SPD Stress-Strain Curve for Low-Plastic Materials

Morrev

Kapyrin

Gryadunov

et al. 2020

KEM

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Stress-strain curve construction for low-plastic alloys under severe plastic deformation conditions is considered. A material under investigation is cast bronze Cu85-Pb5-Sn5-Zn5. Experiments on upsetting and deep rolling were conducted. Based on these data, the initial hardening modular and the hardening modular at large strain were evaluated. Classic tests on determining an initial segment of stress-strain curve can lead to grate mistakes because shear band sliding can diminishes appreciably both yield stress and hardening modular. A correct methodology for stress-strain curve construction is proposed.

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Investigation of Deep Cold Rolling Effects on the Bending Fatigue of Brass C38500

Cited by 9 publications

References 32 publications

Improvement in fatigue strength of 41Cr4 steel through slide diamond burnishing

Improvement in fatigue strength of 41Cr4 steel through slide diamond burnishing

Surface Properties and Corrosion Behavior of Turn-Assisted Deep-Cold-Rolled AISI 4140 Steel

Towards the Problem of Construction an SPD Stress-Strain Curve for Low-Plastic Materials

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