Complications of patellofemoral arthroplasty often occur soon after implantation and, as well as other factors, can be due to the design of the implant or its surgical positioning. A number of studies have previously considered the wear of ultra-high-molecular-weight polyethylene patellae following suboptimal implantation; however, studies have primarily been carried out under a limited number ...

Tribological behavior of powder metallurgically processes AlSi-MWCNT functionally graded materials was apparatus with pins on discs examined. Using a Taguchi design experiments, the signal-to-noise ratio, analysis variance, and an orthogonal array were all used to determine best testing parameters. Analysis revealed wear loss occurs due increase in load sliding distance reduced MWCNT increased ...

In this study, the effect of various normal loads on dry sliding wear, microstructure evolution, and resulting corrosion behavior martensitic AISI 420 were investigated. The results revealed adhesion-dominated wear with material transfer particles, leading to formation a lamellar containing delamination pores around partly broken carbides. evolution resulted in significant decrease local resist...

INTRODUCTION In patients who have undergone a total joint replacement, any mass occurring in or adjacent to the joint needs thorough investigation and a wear debris-induced cyst should be suspected. CASE PRESENTATION An 81-year-old man presented with a painful and enlarging mass at the popliteal fossa and calf of his right knee. He had had a total right knee replacement seven years previously...

Nowadays, due to high ratio of strength to weight, composite cylindrical shells are extensively used in a great variety of different industrial applications and under different cases of loads. In this study, the buckling of composite cylindrical shells was examined under uniform external pressure. The buckling analysis of composite cylindrical shells was first done by using theoretical relation...

In this paper, the tribocorrosion behavior and synergistic effect of 7075-T6 aluminum alloy under different applied loads (100, 150, 200 N) sliding velocities rpm) were studied in a 3.5 wt.% NaCl solution. Tribocorrosion experiments conducted tribobocorrosion system with pin-on-disc testing. The results show that interaction between load velocity significantly affects mechanical electrochemical...

Accumulative roll bonding (ARB) was used to fabricate the Cu-Zn multilayer and Cu-Zn solid solution. A lamellar structure with the hardness of about 130 VHN was formed after eight ARB cycles. Following to the suitable heat treatment, a solid solution with a uniform microstructure and hardness of about 57 VHN was produced. The dominant wear mechanism in the ARB processed multilayer was found to ...

Nowadays, due to high ratio of strength to weight, composite cylindrical shells are extensively used in a great variety of different industrial applications and under different cases of loads. In this study, the buckling of composite cylindrical shells was examined under uniform external pressure. The buckling analysis of composite cylindrical shells was first done by using theoretical relation...

The uniformly dispersed carbon nanotubes (CNTs) reinforced 6061Al composites (CNT/6061Al) with different CNT concentrations were fabricated by powder metallurgy technology. It was found that the friction coefficient as well wear rate decreased first and then increased concentration increasing under 15 N 30 N, minimum achieved at of 2 wt%. Adhesive abrasive dominated mechanisms for 1–2 wt% CNT/6...