M - Aluminium glossary

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Machinability

Machinability is an indication of the difficulty with which a metal can be shaped using a machining process, i.e. one that relies on the formation of...

Macrostructure

The structure of aluminium and its alloys can be examined by etching the metal with chemicals and viewing it under a microscope. When the structure...

Magnesium

Magnesium is a light and highly reactive metal that does not occur naturally in the free state but only as compounds. Further information on magnesium

Magnetic properties

Aluminium is non-magnetic. This property is important for applications in the fields of micro-electronics, electrical engineering, electronics and...

Magnetic-field casting

Magnetic-field casting is a casting process in which the mould is replaced by an electrical loop. The current in the loop generates a magnetic field...

Making up a charge

‘Making up a charge’ is the expression used to describe the addition of alloying elements to a melt.

Manganese

Manganese is a hard, brittle and somewhat reactive metal that, amongst other things, is an important alloying constituent of steel. In addition, it...

Marggraf, Andreas Sigismund

Andreas Sigismund Marggraf, a German chemist (1709-1782), was the first person to discover the basic constituent of alum, namely alumina, which is a...

Master alloy

Aluminium master alloys are alloys used to add elements to a melt in order to obtain an alloy with the desired chemical composition and/or to...

Melting point

The melting point is the temperature at which a substance just starts to melt. It is 660.24 °C in the case of aluminium. Compared to iron-based...

Metal beating

Metal beating is a shaping process that is used to make complex hollow bodies that cannot be made by deep drawing or spinning. During metal beating,...

Metal matrix composites (MMCs)

As the name implies, metal-matrix composites (MMCs) are composites with a metallic matrix. Depending on the method of manufacture, the composites can...

Microstructure

One uses the term microstructure to describe a structure that is only visible when magnified under a light microscope. In such cases, dispersions in...

MIG welding

MIG welding is a special welding process in which an additional electrode is used; it is usually positively charged. Due to the intense heat produced...

Molten Aluminium

For casting and alloying aluminium is melted in special furnaces. Likewise, primary aluminium is initially obtained in molten form following fused-...