Browse Topic: Manganese
A series of buzzing “loop-currents” could explain a recently discovered, never-before-seen phenomenon in a type of quantum material. The quantum material is known by the chemical formula Mn 3Si2Te6, but it’s safe to call it “honeycomb” because its manganese and tellurium atoms form a network of interlocking octahedra that resembles a beehive.
Researchers at Chalmers University of Technology, Sweden, have created a new and efficient way to recycle metals from spent electric vehicle (EV) batteries. The method allows recovery of 100 percent of the aluminum and 98 percent of the lithium in EV batteries. At the same time, the loss of valuable raw materials such as nickel, cobalt, and manganese is minimized. No expensive or harmful chemicals are required in the process because the researchers use oxalic acid – an organic acid that can be found in the plant kingdom.
This specification covers an aircraft-quality, low-alloy steel in the form of mechanical tubing.
This specification covers an aircraft-quality, low-alloy steel in the form of bars, forgings, mechanical tubing, and forging stock.
This specification covers a corrosion-resistant nickel-copper alloy in the form of wire 0.002 inch (0.05 mm) in diameter and larger.
This specification covers an aircraft-quality, low-alloy steel in the form of mechanical tubing.
This specification covers an aircraft-quality, low-alloy steel in the form of sheet, strip, and plate.
This specification covers an aircraft-quality, low-alloy steel in the form of mechanical tubing.
This specification covers an aircraft-quality, low-alloy steel in the form of mechanical tubing.
This specification covers a special aircraft-quality, low-alloy steel in the form of bars.
This specification defines limits of variation for determining acceptability of the composition of cast or wrought nickel, nickel alloy, and cobalt alloy parts and material acquired from a producer.
This specification covers an aluminum alloy in the form of sheet and plate 0.020 to 2.000 inches (0.51 to 50.80 mm), inclusive, in nominal thickness, supplied in the annealed (-O) condition (see 8.3). When specified, product shall be supplied in the “as fabricated” (-F) temper.
This specification covers an aluminum alloy in the form of sheet and plate 0.020 to 4.00 inches (0.51 to 101.60 mm), inclusive, in nominal thickness (see 8.5).
This specification covers an aluminum alloy in the form of sheet and plate with thickness from 0.008 to 4.000 inches (0.20 to 101.6 mm), inclusive, clad on two sides (see 8.6).
This specification covers an aluminum alloy in the form of sheet and plate 0.008 to 4.000 inches (0.20 to 101.6 mm), inclusive, in thickness (see 8.6).
This specification covers an aluminum alloy in the form of sheet clad on both sides with a different alloy for sheet thicknesses of 0.020 to 0.128 inches (0.51 to 3.25 mm), inclusive, in nominal thickness (see 8.5).
This specification covers a titanium alloy in the form of prealloyed powder.
The prime function of crown wheel pinion is to receive the power from transmission & distribute to two-wheel ends. Doing so these members will experience the tremendous bending fatigue. Shot peen is the one of the latest technology used to improve the bending fatigue of the CWP [1]. In this particular case- six CWP are taken for the study to understand the effect of the operations after shot peen process. Three Samples are named as batch A, another 3 samples are named as batch B. Both the batch CWP are shot peened. Then as a regular production practice the batch A CWP are process through hard turning ➔ Abrasive lapping ➔ Hot lubriting (manganese phosphate) ➔ Fully finish ready for assembly. Then both the batch A & batch B samples are taken for residual stress analysis using X-Ray diffraction technique. The measurement location is 50 microns below the surface. The results tabulated, found that batch A samples shows decrease in Residual stress relatively to batch B. This evident that post operations after shot peen process reduces the induced compressed residual stress. This phenomenon is due to material crystal lattice relaxed to original orientation or few of them change over to new orientation, particularly d spacing & angle [2]. The drop in residual stress was approx. 10 to 15% at depth of 50 Micron from the surface. Residual stress drop is not to zero because post operations are not strong enough to nullify the induced compressive residual stress. The study shows that abrasive lapping & hot lubrite operation reduces the induced shot peen compressive residual stress to some extent which could lower the root bending fatigue life of the CWP.
Foundry industries are very much familiar and rich experience of producing ferrous castings mainly Flake Graphite (FG) and Spheroidal Graphite (SG) cast iron. Grey cast iron material is mainly used for dampening applications and spheroidal graphite cast iron is used in structural applications wherein high strength and moderate ductility is necessary to meet the functional requirements. However, both types of cast iron grades are very much suitable in terms of manufacturing in an economical way. Those grades are commercially available and being consumed in various industries like automotive, agriculture etc, High strength SG Iron grades also being manufactured by modifying the alloying elements with copper, chromium, manganese andcobalt. but it has its own limitation of reduction in elongation when moving from low to high strength SG iron material. To overcome this limitation a new cast iron developed by modifying the chemical composition. Additionally, strengthening mechanism were studied to have a linear relationship of strength and elongation even in higher strength. As an outcome, solid solution ferritic strengthened ductile SG iron developed to meet light weight design requirements. In this paper, the effect of alloying elements, strengthening mechanism, chemical, mechanical, microstructural properties, weight optimization, manufacturing challenges and validation etc, are discussed in detail.
This specification covers the specific requirements for 7075 aluminum alloy alclad plate and sheet; the general requirements are covered in AMS-QQ-A-250. The plate and sheet covered by this specification shall be an integral composite product consisting of a heat-treatable aluminum alloy (7075) core with thin layers of an aluminum alloy (7072) anodic to the core and of approximately equal thickness bonded to both surfaces.
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