PT  - JOURNAL ARTICLE
AU  - Rosenberg, Gejza
AU  - Sinaiová, Iveta
AU  - Juhár, Ľuboš
TI  - Influence of microstructural heterogeneities on capacity to absorb energy of dual-phase steels
DP  - 2012 Dec 1
TA  - Manufacturing Technology Journal
PG  - 222--227
VI  - 12
IP  - 2
AID - 10.21062/ujep/x.2012/a/1213-2489/MT/12/2/222
IS  - 12132489
AB  - The effect of microstructural banding (or so called segregation bands) on energy absorption capacity of dual-phase steels (DP steels) was examined by product of tensile strength and uniform elongation (TS×UE), as well as by Charpy V-notch impact test. A series of DP steels with different volume fractions of martensite (VFM) was prepared by intercritical annealing at temperatures ranging 740 to 840 °C. It was found that increasing of VFM has an inverse effect on values TS×UE and notch toughness. The results on samples with a notch and pre-cycled crack showed that presence of segregation bands influences capacity of steels to absorb the energy in initial stage as well as in stage of crack propagation.