Metalurgija, Vol. 51 No. 2, 2012.
Izvorni znanstveni članak
Determination of the forming limit diagram of zinc electro-galvanized steel sheets
W. Fracz
; Faculty of Mechanical Engineering and Aeronautics, Rzeszów University of Technology, Rzeszów, Poland
F. Stachowicz
; Faculty of Mechanical Engineering and Aeronautics, Rzeszów University of Technology, Rzeszów, Poland
Sažetak
Forming limit curves (FLC) of deep drawing steel sheets have been determined experimentally and calculated on the base of the material tensile properties following the Hill, Swift, Marciniak-Kuczyński and Sing-Rao methods. Only the FLC modeled from a singly linear forming limit stress curve exhibits good consistence with experimental curve. It was established that a linearized limit stress locus describes adequately the actual localized neck conditions for the material chosen in this study. The quantitative X-ray microanalysis of the Fe contents in the sheet surface layer composition was used to determine cracking limit curve (CLC) of electro-galvanized steel sheet. The change in zinc layer (and base sheet metal) thickness was used as a criteria in calculation of the CLC.
Ključne riječi
FLC; CLC; strain hardening; plastic anisotropy; electro-galvanizing
Hrčak ID:
74836
URI
Datum izdavanja:
2.4.2012.
Posjeta: 1.953 *