Abstract. Aluminum Lithium alloys are recuperating substantial interest from automotive and aerospace industries owing to their extraordinary specific strength as compared conventional aluminum (2xxx, 6xxx, 7xxx) alloys. The goal of the present investigation is study AA 8090 joints produced with unique solid-state welding technique friction stir (FSW). Tool pin profile induces remarkable influe...

Friction stir welding (FSW) is a solid-state jointing technology, and has the advantages of high joint strength, low residual stress, small deformation after welding. During FSW, temperature directly influences quality weldment. A heat generation model FSW medium thickness aluminum alloy 2219 established considering friction generated at interface between tool workpiece plastic weldment materia...

BACKGROUND Since 2007, Guatemala integrated STI clinical service with an HIV prevention model into four existing public health clinics to prevent HIV infection, known as the VICITS strategy. We present the first assessment of VICITS scale-up, retention, HIV and STI prevalence trends, and risk factors associated with HIV infection among Female Sex Workers (FSW) attending VICITS clinics in Guatem...

The 0.2 wt%C steels with the addition of 2 wt%Si and 0–4 wt%Mn were prepared by hot rolling followed subsequent annealing for normalization. materials subjected to friction stir welding (FSW) conducted above A3 temperature. Microstructures tensile properties using small specimens investigated both base zones. over wt% Mn showed a relatively good balance strength ductility when Si content was du...

AA 6061 has gathered wide acceptance in the fabrication of the light structures required to high strength. Compared to the fusion welding processes that are used for joining structural aluminium alloys, friction stir welding (FSW) process is an emerging solid state joining process in which the material that is being welded does not melt and recast. In this experimental work, an extensive invest...

Although friction stir welding (FSW) has made its way to industrial application particularly in the last years, the FSW process, its influences and their strong interactions among themselves are still not thoroughly understood. The lack of understanding mainly arises from the adverse observability of the actual process with phenomena like material flow and deposition, large material deformation...

A simulation model was developed for the monitoring, controlling and optimization of the Friction Stir Welding (FSW) process. This approach, using the FSW technique, allows identifying the correlation between the process parameters (input variable) and the mechanical properties (output responses) of the welded AA5754 H111 aluminum plates. The optimization of technological parameters is a basic ...

BACKGROUND Considerable HIV transmission occurs among injection drug users (IDUs) in Pakistan and recently the HIV prevalence has been increasing among male (MSW), hijra (transgender; HSW) and female (FSW) sex workers. We describe past and estimate future patterns of HIV emergence among these populations in several cities in Pakistan. METHODS The density of these key populations per 1000 adul...

The single lap shear test is widely used to measure the strength of dissimilar welds even though such a brings limited understanding intrinsic weld toughness. present study proposes numerical finite element (FE) analysis and experimental characterization joints presenting various microstructures (thickness intermetallic layer (IML) hardness profile). For this purpose, Friction Melt Bonding (FMB...