Dynamic deformation and failure process of quasi-closed-cell aluminum foam manufactured by direct foaming technique

Huang, Ruoxuan; Ma, Siqi; Zhang, Meidi; Xu, Jiujun; Wang, Zhiyong

doi:10.1016/j.msea.2019.04.050

Cited by 41 publications

(8 citation statements)

References 36 publications

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“…The contact problem was simplified as a micro-dimpled cylindrical liner acting against a barrel-shaped ring with solid contact [39,40]. Surfaces of the liner and the ring were frictionless.…”

Section: Resultsmentioning

confidence: 99%

Effects of Cast-Iron Surface Texturing on the Anti-Scuffing Performance under Starved Lubrication

Yao

et al. 2019

Materials

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Advances in heavy-duty diesel engine designs place higher demands on the friction and wear performance of the piston ring and cylinder liner (PRCL) interface. The potential of using micro-textures machined on the whole stroke of a cast-iron cylinder liner was investigated in this work. A set of running-in and starved lubrication experiments was performed using a custom reciprocating test rig that imparts a combination of combustion-level pressures and the resulting impacts. Based on a comparison of micro-dimple parameters, the friction coefficient for the running-in period at the shocking dead center was the smallest at a designed combination of 1000-μm diameter, 22% area fraction, and arrangement with half-radius intersecting distance of two adjacent micro-dimple columns. The non-scuffing time under starvation was the longest at a designed combination of the following parameters: 800 μm diameter, 22% area fraction, and quarter-radius intersecting distance arrangement. From finite element analysis, it was found that stress concentrates at the micro-dimple periphery and at the connections between adjacent micro-dimples. However, surface topography examination showed that scuffing initiates in the non-dimpled regions between the micro-dimpled columns rather than at their edges. Finally, under reciprocating motion, micro-dimples can collect wear debris to inhibit further propagation of scuffing in the micro-dimpled region.

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Section: Resultsmentioning

confidence: 99%

Effects of Cast-Iron Surface Texturing on the Anti-Scuffing Performance under Starved Lubrication

Yao

et al. 2019

Materials

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“…These flakes were caused when the plastic flow was formed at the edge of the bearing platform and gradually filled the honing groove, as shown in Figure 12e, f. Finally, the real contact area between the PRCL increased. In addition, these thin layers might also spall off and fracture from edge of the honing platform and then become abrasive particles [34]. These abrasive particles intensified the mechanical occlusion, especially for the higher roughness surface.…”

Section: Surface Morphology Of the Cylinder Liners With Different Roumentioning

confidence: 99%

The Effect of Honing Angle and Roughness Height on the Tribological Performance of CuNiCr Iron Liner

Liu

Wang

et al. 2019

Metals

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This work investigated the effect of honing morphologies of CuNiCr iron liner on its tribological properties sliding against the Cr-Al2O3 coated piston ring. The worn surface morphology and elements distribution as well as the wear behaviors of CuNiCr iron liner were analyzed to explore the influencing of the honing angle and roughness height on the friction and wear resistance. The results show that the optimized honing angle and roughness can improve the tribological performance of the iron liner, and different tribological characteristics are closely related to different roughness parameters. The wear process of the CuNiCr iron liner against Cr-Al2O3 coated piston rings in sequence was platform flattening, plastic flow, growth of the flakes on the platform edge and flakes debonding. For the smooth surface, the plastic deformed flakes were much fewer due to the low height of the platforms, thus the grooves were not fully filled and there was a slight effect of the debonded debris on the friction pair.

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“…There are many techniques for improving the performance of the piston ring, e.g., surface treatment is effective and commonly used. Numerous engineering coatings have been developed to enhance the friction and wear properties of the piston ring under severe operating conditions and prevent scratches [8][9][10][11]. The nitriding process has various advantages for piston rings, e.g., the wear amount and specific wear rate are reduced [12].…”

Section: Introductionmentioning

confidence: 99%

“…Fig 11. Typical SEM images and EDS spectra of the cylinderliner specimen wear against the DLC ring at different interrupted points.…”

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confidence: 99%

Tribological performance and scuffing behaviors of several automobile piston rings mating with chrome-plated cylinder liner

Huang

Yuan

et al. 2021

Friction

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The friction and wear properties, as well as the scuffing resistance, of different piston-ring coatings mating with a chrome-plated cylinder liner were investigated. Interrupted wear tests under the lubricant starvation condition were conducted to examine the wear behavior of Cr-diamond coating (GDC) and diamond-like coating (DLC). The results indicated that the DLC coating had outstanding tribological properties (small coefficient of friction and wear loss) at 150 °C, while the GDC coating exhibited better performance at an elevated temperature (240 °C). The DLC coating had a better scuffing resistance; no material adhesion occurred for 70 min under the unlubricated condition. The interrupted wear behaviors revealed that the scuffing process of the GDC coating involved the consumption of lubricant oil with relatively stable wear, a reduction in the friction force, and the occurrence of scuffing, in sequence. In contrast, although the friction force also increased after a short period of weak friction, no scuffing was observed. This is attributed to the formation of a mixed oxide and graphitic C tribolayer.

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Dynamic deformation and failure process of quasi-closed-cell aluminum foam manufactured by direct foaming technique

Cited by 41 publications

References 36 publications

Effects of Cast-Iron Surface Texturing on the Anti-Scuffing Performance under Starved Lubrication

Effects of Cast-Iron Surface Texturing on the Anti-Scuffing Performance under Starved Lubrication

The Effect of Honing Angle and Roughness Height on the Tribological Performance of CuNiCr Iron Liner

Tribological performance and scuffing behaviors of several automobile piston rings mating with chrome-plated cylinder liner

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