Nowadays titanium alloys are extensively used for aerospace and biomedical applications. However, despite good mechanical properties and excellent corrosion resistance they possess poor wear resistance and a tendency to galling and seizure. In this study the tribological properties of experimental Ti-Si-Zr based alloys were studied using a standard ball-on-disc wear testing system. The wear and...

This article focuses on a systematic study of Ti-6Al-4V alloy in order to extensively characterize the main mechanical properties at macro-, micro- and submicrometric length scale under different stress fields. Hardness, elastic modulus, true stress–strain curves strain-hardening exponent are correlated with intrinsic ?- ?-phases that constitute this alloy. A characterization process followed, ...

Zinc coating is formed by the heterogeneous assembly of the Γ, Γ1, δ, ζ and η phases whose mechanical properties greatly differ from each other. Thermal strains resulting from large differences between thermal expansion coefficients are partially relaxed by the formation of a crack network. In order to model this phenomenon, initial hardness, thermal expansion coefficient αi and toughness (KIC)...

In this research, the effect of vibration at the resonant range (75 Hz) on the hardness and tensile strength of AA-5083-H321 aluminum alloy, were welded by gas metal arc welding (GMAW) investigated. Vibration forces were ranged from 850 N to 2200 N, under identical welding parameters. Tensile strength and hardness testing of welded samples were performed. After mechanical tests, the fracture su...

Research indicates that users of thermally modified wood lack information regarding the improved performance and any variations may exist for “same” product when manufactured by different companies. The goal this study was to evaluate variability in mechanical properties three hardwoods determine between manufacturers. To hardness, bending (modulus elasticity module rupture) shrinkage values, t...

These notes survey and explore an emerging method, which we call the low-degree for understanding statistical-versus-computational tradeoffs in high-dimensional inference problems. In short, method posits that a certain quantity—the second moment of likelihood ratio—gives insight into how much computational time is required to solve given hypothesis testing problem, can turn be used predict har...

Abstract This work describes the architecture of a versatile system that is dedicated to testing various integrated circuits in radiation (e.g., ASICs, FPGAs). The powers device under test remotely. It monitors and reads out real time parameters, like: power consumption, voltage current (with resolution 100 µV µA, respectively), specific operational parameters its package temperature. A key fea...

Objective: This study assessed the Vickers hardness (VHN) provided by two LCUs when using (1) direct and indirect light-curing techniques, (2) 40 and 60 s and (3) top and bottom surfaces. Material & Methods: One halogen Curing Light 2500 (3M Espe) and one LED (MM Optics) were used by direct and indirect (0, 1.0, 2.0 and 3.0 mm of dental structure) techniques during 40 and 60 s. The samples were...