RT Journal Article
SR Electronic
A1 Rosenberg, Gejza
A1 Sinaiová, Iveta
A1 Juhár, Ľuboš
T1 Influence of microstructural heterogeneities on capacity to absorb energy of dual-phase steels
JF Manufacturing Technology Journal
YR 2012
VO 12
IS 2
SP 222
OP 227
DO 10.21062/ujep/x.2012/a/1213-2489/MT/12/2/222
UL https://journalmt.com/artkey/mft-201202-0026.php
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.