Investigation on S-136 steel surface planarization by chemical mechanical polishing

Zhang, Dongbo; Liu, Juanbo; Chen, Yunbo; Wang, Miaohui; Ge, Xueyuan

doi:10.1016/j.mee.2015.01.043

Cited by 13 publications

(10 citation statements)

References 22 publications

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“…The adopted values of D and G 20,32 as well as the resulting roughness values are well within the range of experimentally measured data. [54][55][56][57][58][59] The roughness data shows that higher value of D and lower value of G are associated with smoother topography.…”

Section: Finite Element Modelling Of Fractal Surfacementioning

confidence: 99%

Loading–unloading contact analysis of a fractal rough surface with functional gradation

Jana

Mitra

Sahoo

2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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The present paper deals with a finite-element-based static loading–unloading analysis of a functionally graded rough surface contact with fractal characteristics. Two different gradation models, namely elastic and plastic gradations, are adopted. In these models, one out of yield strength and Young's modulus is varied spatially according to exponential functions, while the other is kept constant. In both these material models, separate inhomogeneity parameters control the variation of material properties. The gradation is such that throughout the top of the rough surface properties remain constant with variations in the depth direction being controlled by the above-mentioned parameters. Different fractal surfaces with different levels of roughness (governed by the values of fractal dimension and fractal roughness) have been analysed. The influence of the gradation parameters on the contact properties, viz. contact force, contact area, contact stress, etc., are investigated for both loading and unloading phases. It was found that for most of the loading phase, higher elastic, as well as plastic gradation parameter, causes higher contact force and contact area. However, in the case of the unloading of elastically graded surfaces, this trend is not maintained throughout. For the cases, where a substantial amount of yielding takes place during loading near the contact surface, the resulting contact area is found to be higher for the unloading phase in comparison with the same during the loading phase. The trend of plastic yielding at the vicinity of the contact surface is studied for varying gradation parameters. It is observed that the higher volume of yielded material is obtained for the higher value of elastic gradation parameter. On the other hand, the higher value of plastic gradation parameter causes more yielding to take place at the vicinity of the contact surface. Additionally, the effect of gradation on the energy dissipation due to plasticity after complete unloading is explored in detail.

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Section: Finite Element Modelling Of Fractal Surfacementioning

confidence: 99%

Loading–unloading contact analysis of a fractal rough surface with functional gradation

Jana

Mitra

Sahoo

2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…As an improved AISI 420 mold steel, 1 S136 steel is widely used in manufacturing field of plastic forming molds, 2 which easily leads to surface wear and deformation in the plastic forming process due to its low hardness. 3 Especially, wear has become one of the main failure forms for S316 steel, many strengthening technologies are used to improve its surface hardness, which may prolong its service life.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ti₂SnC mass fraction on microstructure and friction–wear performance of laser cladded Ni–WC coatings under WS₂ lubrication condition

Yongfu

Dejun

2022

Proceedings of the Institution of Mechanical Engineers, Part B:

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Ni–WC coatings with the different Ti2SnC mass fractions were prepared on the substrate of S136 steel by laser cladding (LC), in which the metallurgical bonding was formed at the coating interfaces. The microstructure and phases of obtained coatings were analyzed using a super depth of field microscope (SDFM) and X-ray diffraction (XRD), respectively. The effect of Ti2SnC mass fraction on the microstructure and tribological properties of Ni–WC coating were investigated using a ball-on-disc wear tester, and the wear model was also established to analyze the role of Ti2SnC phase in the friction process. The results show that the Ni–WC–8%Ti2SnC coating has the lowest coefficient of friction (COF) and wear rate among the three kinds of coating, and the wear mechanism is abrasive wear, which is contributed to the friction reduction and wear resistance roles of Ti2SnC phase. Furthermore, the COF and wear rate of Ni–WC coating can be reduced by the addition of appropriate Ti2SnC mass fraction, which may provide the reference for the friction and wear of Ti2SnC MAX phase in the coating field.

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“…Nevertheless, to the best of authors' knowledge, the studies on the corrosion behavior of the SLM samples for molds are limited. S136 mold steel modified from AISI 420, shows favorable mechanical properties and outstanding corrosion resistances [24]. It currently becomes one of the most widely used materials for injection molds.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Behavior of the S136 Mold Steel Fabricated by Selective Laser Melting

Wen

Zhou

Han

et al. 2018

Chin. J. Mech. Eng.

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The selective laser melting (SLM) method has a great potential for fabricating injection mold with complex structure. However, the microstructure and performance of the SLM molds show significantly different from those manufactured by traditional technologies. In this study, the microstructure, hardness and especially corrosion behavior of the samples fabricated by SLM and casting were investigated. The XRD results exhibit that the γ-Fe phase is only obtained in the SLM parts, and the α-Fe peak slightly moves to low diffraction angle compared with casting counterparts. Due to the rapid cooling rate, the SLM samples have fine cellular microstructures while the casting ones have coarse grains with obvious elements segregation. Besides, the SLM samples show anisotropy, hardness of side view and top view are 48.73 and 50.31 HRC respectively, which are 20% higher than that of casting ones. Corrosion results show that the SLM samples have the better anti-corrosion resistance (in a 6% FeCl 3 solution for 48 h) but the deeper corrosion pits than casting ones. Finally, the performance of the SLM molds could meet the requirement of injecting production. Moreover, the molds especially present a significant decrease (20%) of cooling time and increases of cooling uniformity due to the customized conformal cooling channels.

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Investigation on S-136 steel surface planarization by chemical mechanical polishing

Cited by 13 publications

References 22 publications

Loading–unloading contact analysis of a fractal rough surface with functional gradation

Loading–unloading contact analysis of a fractal rough surface with functional gradation

Effect of Ti₂SnC mass fraction on microstructure and friction–wear performance of laser cladded Ni–WC coatings under WS₂ lubrication condition

Corrosion Behavior of the S136 Mold Steel Fabricated by Selective Laser Melting

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Investigation on S-136 steel surface planarization by chemical mechanical polishing

Cited by 13 publications

References 22 publications

Loading–unloading contact analysis of a fractal rough surface with functional gradation

Loading–unloading contact analysis of a fractal rough surface with functional gradation

Effect of Ti2SnC mass fraction on microstructure and friction–wear performance of laser cladded Ni–WC coatings under WS2 lubrication condition

Corrosion Behavior of the S136 Mold Steel Fabricated by Selective Laser Melting

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Effect of Ti₂SnC mass fraction on microstructure and friction–wear performance of laser cladded Ni–WC coatings under WS₂ lubrication condition