With recent improvements to the properties of ultra-high molecular weight polyethylene (UHMWPE) used in joint replacements, prosthetic knee and hip longevity may extend beyond two decades. However, it is difficult and costly to replicate such a long in vivo lifetime using clinically relevant in vitro wear testing approaches such as walking gait joint simulators. We advance a wear test intermedi...

Abstract Forging dies are crucial in forging to manufacture accurate workpieces. These generally made of AISI H steel series and hardened tempered medium carbon alloy steel. Dies processed by using high-speed milling + polishing or electrical discharge machining polishing. The surface quality the workpiece depends on properties these dies, where roughness, material hardness, wear evolution thei...

In a recent meeting, RM Needham mentioned a Personal Identification Number (PIN) management scheme for bank’s cash dispenser transactions, which provides enhanced privacy and responsibility separation. This scheme was described as a brief example that supports his idea on security research under the changing computing environment. In this memo, we suggest a practical PIN management scheme based...

This article evaluates the effect of recrystallization annealing soaking time on tribological behavior cold upsetted low carbon steel. The 40% formed steel was subjected to at 900 °C, for 10, 20, 30, 40, 50 and 60 minutes. mechanical properties hardness, tensile strength, yield strength ductility, measured through specific deformation, as well precipitation carbides microstructural analysis wer...

Fins are protrusions on a heat transfer surface to augment heat transfer rate from it. The increase in area exposed to convection in case of finned surfaces results in increased heat transfer rate. In this study heat transfer characteristics of a pin fin with perforation is numerically analyzed. A pin fin is fabricated and experiments are done under forced convection conditions. The experimenta...

The Performance of electric vehicle IGPT Pin fin heat sink can be measured by the temperature field and the fluid pressure and other parameters. In order to improve the cooling effect of Pin fin heat sink, diameter, length and distance of the fin was optimized combination. The relationship between pressure drop of the water inlet, outlet and pin fin parameters was analyzed and calculated. It wa...

Bakırın yüksek elektriksel iletkenlik ve termal gibi mükemmel özelliklerine rağmen mekanik özelliklerinin zayıf olması, geliştirilmesi gerçeğini ortaya koymaktadır. Bu çalışmada toz metalürjisi ile üretilen Cu-Cr-B4C-CNF hibrit kompozitlerin özelliklerini iyileştirmek amacıyla aşınma özellikleri deneysel olarak araştırılmıştır. Kompozitlerin performanslarını belirlemek pin-on-disk metodu kullan...

DLC coatings are deposited on aluminium substrates to improve the wear resistance property of using sputtering deposition in this study. graphite target onto Al5051 DC sputtering. The then analyzed for their adhesion strength, hardness, coefficient friction, and chemical compositions. pin-on-disk method is conducted vacuumed conditions, dry air conditions (0% RH), ambient (40% RH). different te...