Formability

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Formability is the property of a material to be permanently formed through external stress .

Workpieces are permanently changed in their shape through rolling , forging , driving and other forming processes . One speaks here of plastic deformation . The suitability of a material for this process is called its formability. Materials that are easily deformable are therefore easily plastically deformable.

The formability is u. a. defined by the position of two limits:

  • The yield point : A tensile test shows that there is a lower limit for plastic deformation: below this limit, the material can only be deformed elastically, i.e. it will return to its original shape after the tensile forces have ceased.
  • The breaking limit : the material cannot be plastically deformed indefinitely: if the breaking limit is exceeded, the material breaks.

See also

literature

  • Serope Kalpakjian, Steven R. Schmid, Ewald Werner: Material technology. 5th edition, Pearson Education GmbH, Munich 2011, ISBN 978-3-86894-006-0 .

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