This article deals with the optimization of friction stir welding process parameters filler ratios on dissimilar Aluminium alloy groups. For this purpose, 6 series 6082 and 5 5052 were taken. Microhardness property was conducted under various rotational speeds, speed, plunge depth, Center distance between holes mixing ratio. The Central Composite Design (CCD), most commonly used Response Surfac...

Abstract Super abrasive diamond grinding wheels are the most promising tools for precision machining of advanced ceramics and carbide materials. However, efficiency conventional conditioning these is limited owing to high dressing tool wear, long process time, low form flexibility, induced damage grains. Wire electrical discharge (WEDM) an alternative method superabrasive with electrically cond...

Abstract A statistical optimization based on experimental work was conducted to consider ultimate tensile strength (UTS) and elongation of dissimilar joints between AA5454 AA7075 by friction stir weld (FSW). The goal this is develop a comparative study the FSW parameters using different orthogonal arrays, i.e., L12 L16. Four correlated softening forging requirements (rotational speed, traverse ...

The use of an alkane mixture that remains liquid at 77 K to freeze specimens has advantages over the use of a pure alkane that is solid at 77 K. It was found that a mixture of methane and ethane did not give a cooling rate adequate to produce vitreous ice, but a mixture of propane and ethane did result in vitreous ice. Furthermore, the latter mixture produced less damage to specimens mounted on...

It is difficult to achieve Al/Cu dissimilar welds with good mechanical properties for medium-thick plates due the inherent high heat generation rate at shoulder-workpiece contact interface in conventional friction stir welding. Thus, double-side welding innovatively applied join 12-mm 6061-T6 aluminum alloy and pure copper plates, effect of speeds on joint microstructure systematically analyzed...

The loss of linear momentum by gravitational radiation and the resulting gravitational recoil of black-hole binary systems may play an important role in the growth of massive black holes in early galaxies. We calculate the gravitational recoil of nonspinning black-hole binaries at the second post-Newtonian order (2PN) beyond the dominant effect, obtaining, for the first time, the 1.5PN correcti...

In seabirds a broad variety of morphologies, flight styles and feeding methods exist as an adaptation to optimal foraging in contrasted marine environments for a wide variety of prey types. Because of the low productivity of tropical waters it is expected that specific flight and foraging techniques have been selected there, but very few data are available. By using five different types of high...