PT Journal
AU Rosenberg, G
   Sinaiova, I
   Juhar, L
TI Influence of microstructural heterogeneities on capacity to absorb energy of dual-phase steels
SO Manufacturing Technology Journal
PY 2012
BP 222
EP 227
VL 12
IS 2
DI 10.21062/ujep/x.2012/a/1213-2489/MT/12/2/222
DE dual phase steel; microstructural banding; energy absorption capacity
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.
ER