Electrical-current-assisted friction stir welding (EA-FSW) is a procedure developed for the joining of similar and dissimilar materials. EA-FSW newly invented solid-state process to increase welded components’ efficacy in various applications, such as marine structures. joints have investigated on aluminum–magnesium, aluminum–steel, polymer-to-steel. Similar been performed aluminum, magnesium, ...

In this work, a finite-element model was elaborated to simulate the thermomechanical behavior of 6061 aluminum alloy during friction-stir welding (FSW). It shown that FSW-induced deformation is two-stage process. addition stirring action exerted by rotating tool probe, material in near-surface area stir zone also experienced secondary shoulder edge after passage tool. Both steps were found be c...

BACKGROUND Since 2000, peer-mediated interventions among female sex workers (FSW) in Mombasa Kenya have promoted behavioural change through improving knowledge, attitudes and awareness of HIV serostatus, and aimed to prevent HIV and other sexually transmitted infection (STI) by facilitating early STI treatment. Impact of these interventions was evaluated among those who attended peer education ...

OBJECTIVES To estimate HIV prevalence and risk factors in population-based samples of female sex workers (FSW) and female voluntary counseling and testing (VCT) clients in Rwanda. METHODS We conducted a cross-sectional survey of 800 FSW and 1,250 female VCT clients in Rwanda, which included interviewing and testing for HIV-1/2, HSV-2 and pregnancy, and BED-CEIA and Avidity Index (AI) to ident...

Friction stir welding (FSW) is employed for of aluminium metal matrix composite (MMC) reinforced with zirconium dioxide and Graphite as the reinforcing element. Stir casting used mixing MMC The specimens are fabricated in form rectangular plates then welded using FSW process. process parameters considered this work are; tool rotational speed, speed axial load. tensile strength hardness weld nug...

The aluminum-copper alloy AA2219 is commonly joined by friction stir welding (FSW). strengthening Al2Cu phases are affected the temperatures produced as a function of FSW process. This work characterizes effect on fatigue crack growth and fracture response AA2219-T87. Specifically, virgin material’s microhardness, strength, θ-phase evolution studied time temperature. data compared to microhardn...

in this article effects of friction stir welding (fsw) tool rotational and traverse speeds were studied on heat generation and temperature distribution in welding zone of aa1100 aluminium alloy. computational fluid dynamics method was used to simulate the process with commercial cfd fluent 6.4 package. to enhance the accuracy of simulation in this study, the welding line that is located workpie...

friction welding is widely used in various industries. in friction welding, heat is generated by conversion of mechanical energy into thermal energy at the interface the work pieces during pin rotation under pressure. a three-dimensional thermo mechanical simulation of friction stir welding (fsw) processes is carried out for aluminium alloys of 6061and 7050 where the simulation results are comp...

Two subjects carried out a saturation dive to 600 FSW with excursions to 800 feet of seawater (FSW). Two other subjects performed a saturation dive to 800 FSW. Both divers carried out two short excursion dives to 1050 and 1112 FSW followed later by an excursion dive to 1000 FSW lasting for 2-3/4 hours. All four divers noted helium tremors during their first excursion dive at depth exceeding 600...