Publication detail

On the evaluation of strain inhomogeneity by hardness measurement of formed products

PETRUŠKA, J. JANÍČEK, L.

English title

On the evaluation of strain inhomogeneity by hardness measurement of formed products

Type

journal article - other

Language

en

Original abstract

Large plastic deformation of cold formed metal is followed by its hardening, which can be experimentally evaluated by measuring hardness. To convert the measured hardness values into strain, the strain–hardness reference curves are used. Their evaluation is traditionally based on compression tests of cylindrical specimens. New procedure of reference curves evaluation is suggested here, based on an FE simulation of a forming process and direct relation of computed strain and measured hardness. The procedure is illustrated on the example of forward extrusion process and reference curves, obtained by classical and newly suggested procedure are compared.

English abstract

Large plastic deformation of cold formed metal is followed by its hardening, which can be experimentally evaluated by measuring hardness. To convert the measured hardness values into strain, the strain–hardness reference curves are used. Their evaluation is traditionally based on compression tests of cylindrical specimens. New procedure of reference curves evaluation is suggested here, based on an FE simulation of a forming process and direct relation of computed strain and measured hardness. The procedure is illustrated on the example of forward extrusion process and reference curves, obtained by classical and newly suggested procedure are compared.

Keywords in English

Hardness measurement; Strain distribution; FE simulation; Compression test; Forward extrusion

RIV year

2003

Released

01.01.2003

ISSN

0924-0136

Journal

Journal of Materials Processing Technology

Volume

143-144

Number

12

Pages count

6

BIBTEX


@article{BUT41838,
  author="Jindřich {Petruška} and Libor {Janíček},
  title="On the evaluation of strain inhomogeneity by hardness measurement of formed products",
  journal="Journal of Materials Processing Technology",
  year="2003",
  volume="143-144",
  number="12",
  month="January",
  issn="0924-0136"
}