M - Aluminium Articles

A (31) | B (4) | C (8) | D (4) | E (8) | F (2) | G (4) | H (8) | I (4) | J (6) | L (2) | M (11) | P (18) | R (10) | S (5) | T (7)

Magnesium

Magnesium is a light metal and belongs to Group IIA of the Periodic Table, the alkaline earth metals. It is a very reactive element and does not occur in nature in pure form, only as compounds. Its chemical properties are not all that dissimilar from aluminium, including the fact that it also forms an oxide layer on exposure to air and moisture.

Modification of aluminium-silicon alloys

Modification is a treatment used with hypoeutectic or eutectic aluminium-silicon alloys. The addition of a modifier transforms the lamellar structure found in melts free from phosphorus or sodium. Modification leads to an extremely high refinement of the aluminium-silicon eutectic during solidification and at the same time shifts the eutectic

Melting and casting: Oxidation

The positive effect of oxidation is highly undesirable during melting and casting of aluminium. An increased fraction of oxides in suspension in the melt can lead to all kinds of problems, of which the most important ones will be mentioned here: inferior fluidity inferior ability to fill the mould feeding is impeded greater mould wear in die

Machining: Aluminium alloys with similiar machinability

When one considers the extremely large differences between the properties of individual aluminium alloys and their related effects on the machinability, it becomes clear that it would be too complex and thus impossible to plan a machining process completely. However, as a starting point it is advisable to divide the broad range of different

Master alloys: Production

Different processes are available for producing master alloys depending on the alloy system concerned: Dissolution of the elements to be alloyed in a molten metal Aluminothermic of compounds with excess aluminium Production of pressed shapes from metal powder Other processes are occasionally used, such as carbothermic reduction, reduction using

Modern architecture relies on aluminium

Timeless material with many facets As has been the case for years, major building projects are no longer built in the classical manner, stone by stone. Increasingly, modern administrative buildings, hotels and shopping centres have a transparent structure in which glass and metal set the tone. And the trend towards transparent structures, which

MIG Metal Inert Gas

Metal inert gas welding is one the most commonly used processes for welding workpieces made from aluminium or aluminium alloys. In this process, the metal welding wire, which acts as both a conductor for the arc and filler metal, is continually fed to the torch with the help of an automatic feeding device. The arc and the weld pool are protected

Manganese

Manganese is a hard, brittle metal; it belongs to sub-group VIIB of the Periodic Table, which is named after it. It is somewhat reactive and is an important constituent of steel. In addition, it is an important trace element in the human body and is thought to play an important role in the metabolism of Vitamin B. As an alloying element in

Manufacture of aluminium MMC

Mixing reinforcements into the molten metal The least technically demanding way of producing MMCs is to mix the reinforcements in molten metal with subsequent casting of the melt. The difficulties here are the poor wettability between the molten metal and the reinforcing phase and the possibility of reactions between both phases. This method is

Machining: Tool wear

Crater wear, which is typical for steel, practically does not occur when machining aluminium. The tool wear caused by aluminium-based materials is a result of abrasion of the machined surfaces. As far as tool wear is concerned, the most important factors are the material being machined and the cutting conditions. With respect to tool life, i.e.

Machining: Tools: Ceramic cutting materials

Ceramic cutting materials and synthetic cutting materials are unsuitable for the machining of aluminium. Undesirable chemical reactions take place between the aluminium being machined and the aluminium oxide contained in the ceramic cutting materials. This causes more rapid tool wear. Coated cutting edges are also unsuitable. Although it is