Strain-rate sensitive ductility in a low-alloy carbon steel after quenching and partitioning treatment

Frint, P.; Kaiser, T.; Mehner, T.; Bruder, E.; Scholze, M.; Mašek, B.; Lampke, T.; Wagner, M. F.-X.

doi:10.1038/s41598-019-53303-1

Strain-rate sensitive ductility in a low-alloy carbon steel after quenching and partitioning treatment (bibtex)

by P. Frint, T. Kaiser, T. Mehner, E. Bruder, M. Scholze, B. Mašek, T. Lampke, M. F.-X. Wagner

Abstract:

We investigate an extraordinarily high ductility in a low alloy carbon steel at an elevated temperature after a quenching and partitioning (Q&P) treatment. The conventional (quenched and tempered) reference material does not show similar behavior. Interestingly, the Q&P treated material’s ductility is considerably reduced at increasing strain rates while strength remains almost constant. These results indicate the presence of a diffusion-controlled deformation mechanism at elevated temperatures. Our research shows that interlath retained austenite is more stable during deformation at higher temperatures, resulting in a delayed transformation to martensite and therefore to a more pronounced contribution to plastic deformation at (and in the vicinity of) the many interfaces inherently present in this multi-phase steel.

Reference:

Frint, P., Kaiser, T., Mehner, T., Bruder, E., Scholze, M., Mašek, B., Lampke, T., Wagner, M. F.-X.: Strain-rate sensitive ductility in a low-alloy carbon steel after quenching and partitioning treatment, Scientific Reports 9, 17023, 2019.

Bibtex Entry:

@Article{Frint2019a,
  author    = {Frint, P. and Kaiser, T. and Mehner, T. and Bruder, E. and Scholze, M. and Ma{\v{s}}ek, B. and Lampke, T. and Wagner, M. F.-X.},
  title     = {Strain-rate sensitive ductility in a low-alloy carbon steel after quenching and partitioning treatment},
  journal   = {Scientific Reports},
  year      = {2019},
  volume    = {9},
  number    = {1},
  pages     = {17023},
  month     = {nov},
  abstract  = {We investigate an extraordinarily high ductility in a low alloy carbon steel at an elevated temperature after a quenching and partitioning (Q&P) treatment. The conventional (quenched and tempered) reference material does not show similar behavior. Interestingly, the Q&P treated material’s ductility is considerably reduced at increasing strain rates while strength remains almost constant. These results indicate the presence of a diffusion-controlled deformation mechanism at elevated temperatures. Our research shows that interlath retained austenite is more stable during deformation at higher temperatures, resulting in a delayed transformation to martensite and therefore to a more pronounced contribution to plastic deformation at (and in the vicinity of) the many interfaces inherently present in this multi-phase steel.},
  doi       = {10.1038/s41598-019-53303-1},
  publisher = {Springer Science and Business Media {LLC}},
}