Luftvergütende hochfeste Stähle für mehr Crashsicherheit

Diekmann, Uwe; Säuberlich, Thomas; Frehn, Andreas

doi:10.1007/bf03221938

Cited by 9 publications

(2 citation statements)

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“…The striking observation is that the matrix ferrite displays transgranular, crystallographic cleavage-like fracture. As mentioned above, the presence of brittle (Fe, Mn) 3 Al and (Fe, Mn) 3 Si intermetallic compounds in the ferrite phase would reduce its ductility thereby leading to a brittle fracture in the ferrite regions.…”

Section: Fracture Behaviors Of Fe-15mn-al-si Steelmentioning

confidence: 99%

“…Especially, the automotive industry demands for the combination of these properties due to safety reasons and resource efficiency. [1][2][3] It is interesting to find that high manganese steels showing transformation-induced plasticity (TRIP) and twinning-induced plasticity (TWIP) are very promising candidates for future applications. [4][5][6] The high manganese austenitic steels discovered by Sir Hadfield in 1880 constitute one of the most attractive materials for structural application, since they often exhibit a unique combination of high strength and good ductility.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical Properties and Tensile Fracture Mechanisms of Fe–Mn–(Al, Si) TRIP/TWIP Steels with Different Ferrite Volume Fractions

et al. 2015

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The mechanical properties, damage, and fracture behaviors of Fe-Mn-(Al, Si) steels containing different Mn content and volume fraction of ferrite have been investigated through tensile testing. It is found that the volume fraction of ferrite has significant influences on the mechanical properties and damage accumulation. With increasing the Mn content, both the yield strength and ultimate tensile strength are decreased, while the uniform elongation is continuously increased, showing a typical trade-off relation between strength and elongation. The difference in the work-hardening behavior can be attributed to the increase in the stacking fault energy (SFE) caused by the addition of Mn. The failure mechanisms of the steels are found to be mainly influenced by deformation localization due to microstructural inhomogeneity. On the one hand, the Fe-Mn-(Al, Si) steel with a much more uniform distribution of austenite shows a slower rate of damage growth and a continuous void nucleation during the deformation process, resulting in a higher void density prior to the final fracture. On the other hand, the Fe-Mn-(Al, Si) steel with more ferrite exhibits accelerated void growth and catastrophic coalescence.

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Section: Fracture Behaviors Of Fe-15mn-al-si Steelmentioning

confidence: 99%