... and 2 vol% BNNTs. Successful dispersion of nanoparticles within the aluminum matrix was achieved. The hardness of the coatings exhibited significant improvements compared to the pure aluminum coating. Specifically, the Al-BNNT coating showed a hardness increase of 14.1%, the Al-B 4 C-BNNT coating...

... and mechanical variation with respect to the addition of TiB 2 onto the AA2024 surface was studied and evaluated. Results proposed an increase in mechanical strength and hardness with respect to TiB 2 addition when compared with the substrate metal. Dry sliding wear characteristics of aluminum surface composites...

.... The presence of Mg and Si compounds in AA-6063 is the reason for the increasing hardness of the in situ casting. Fig. 5 XRD spectrum of in situ cast at 900W microwave power, SiC as a susceptor, and open cavity solidification XRD spectrum of in situ cast at 900W microwave power, SiC as a susceptor...

... contact mechanics dry friction hardness surfaces wear Additive manufacturing has found an increasing demand in a variety of industries and research issues due to its capacity to produce near-net shape and complex parts [ 1 – 4 ]. Due to its rapid material deposition and building rates, wire...

... 05 09 2022 06 09 2022 17 11 2022 laser additive manufacturing heat treatment Hastelloy c22 residual stress wear mechanism abrasion dry friction hardness surface treatments wear mechanisms National Natural Science Foundation of China 10.13039/501100001809...

.... The microstructures were studied using a optical microscope (OM), electron backscatter diffraction (EBSD), and scanning electron microscope (SEM). Hardness is measured using Vickers’s microhardness tester. The impact of WS 2 on the friction and wear resistance of Mg-AZ91 were evaluated using a pin-on-disc apparatus...

... characteristics. The results revealed a better wear resistance and friction coefficient for recycled nanocomposites than pure magnesium. The enhanced wear resistance of recycled nanocomposites is attributed to the increased hardness and strength due to the Fe 3 O 4 nanoparticles and the turning induced...

... a uniaxial hydraulic press under 800 MPa pressure, and thus, green compacts in Ø12 × 6 mm dimensions were produced. The green compacts produced were sintered at 1300 °C in a vacuum environment of 10 −6 mbar for 2 h. Sintered composites were characterized by hardness and density measurements...

... conditions). Microstructural analysis revealed uniform distribution of ceramic particles in the matrix. Significant reduction in grain size and change in morphology was obtained for LB composites whereas strong interfacial bonding was obtained for LI composites. Higher hardness, lower wear-rate, and higher...

... the hardness and wear resistance, whereas the humidity-sensitive alumina phase reduced friction at higher humidity levels. Next, CuO (5 wt%) was added to the Al 2 O 3 -B 2 O 3 composites to form Al 2 O 3 -B 2 O 3 -CuO composites. These composites showed an increase in the percentage relative density by 16–37...

... key area being space tribology. Bulk metallic glasses (BMGs) are a class of alloy characterized by their amorphous structure, which results in a material with extremely high strength, corrosion resistance, high hardness, and high elastic limit. BMGs have demonstrated improved wear resistance when...

... nanocomposites. After 1 h of mechanical milling of A356 and nano-Al 2 O 3 powders, green compacts were obtained by cold pressing. Green compacts were sintered at 550 °C in a vacuum environment (10 −6 mbar) for 1 h. Samples were characterized by density, hardness measurements, scanning electron microscopy...

...) and energy-dispersive spectrometer (EDS). The results show that the introduction of nitrogen improves the hardness and wear resistance of Zr-based metallic glass. Compared with the non-N-doped Zr-based metallic glass, the N-doped Zr-based metallic glasses have higher hardness and lower wear-rate...

... density of dislocations and short bar-shaped cementite. The bainite exhibited higher hardness and elasticity but lower plasticity than the matrix microstructure. The incongruity of plastic deformation between upper bainite and matrix microstructures will lead to stress concentration at boundary...

... of the Russian Federation under Grant No. МK-1234.2020.8. The authors like to express their gratitude toward the management of Тomsk Scientific Center SB RAS for their support with the NanoTest 600 hardness tester during tribology testing. The authors also thank O. V. Krysina, a research engineer...

... installation position under continuous field operation conditions. The hardness, phase structure, elemental composition, and micromorphology of the spindle hook teeth were characterized using microhardness, X-ray diffractometer (XRD), energy spectrum analyzer (EDS), and scanning electron microscope (SEM) after...

... behavior is due to the combined thermomechanical solicitation, which increases the hardness of the friction material. From the strain field analysis, the evolution took place on the strain localizations, which strongly depend on the distribution of graphite inclusions in the microstructure. The change...

... not lead to the formation of new compounds. However, it significantly improves the shore hardness and tribological properties of EPDM. In addition, significant stick-slip phenomenon occurs during the wear process of EPDM with different carbon black content. During the wear process of EPDM, there are both...

.... AISI 4140 steel was coated with NiP through an autocatalytic bath with the addition of Al 2 O 3 particles maintained in suspension by mechanical stirring. Following, the coated samples were annealed at 600 °C to increase the hardness and to create an interdiffusion layer, which improves coating...

... of Ti exceeds 0.5, Laves phases appeared in the coatings. With increasing of Ti, the micro-hardness and wear resistance of the coatings increased, but friction coefficient and crack resistance of the coatings reduced. Suitable Ti content in the FeCoNiCrMnTi x , laser composite coating, had higher...