Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review
Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review
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TY - GEN
T1 - The effect of silicon on the ε → θ transformation in ultra-strong spring steels
AU - Kim, B.
AU - San Martín, D.
AU - Chao, J.
AU - Rivera-Díaz-del-Castillo, P. E.J.
PY - 2012
Y1 - 2012
N2 - Tempered martensitic steels have shown considerable strengthening by controlled precipitation of the transitional ε-carbide, which is precursor to the more stable cementite phase. It is widely accepted in literature that silicon plays a particular role in the aforementioned transformation. In order to gain further insight, studies have been carried out in a spring steel model alloy of composition Fe-0.55C-2.2Si wt.%. Mechanical tests have shown that in the ε → θ transformation regime there is a loss in strength and an increase in ductility. Albeit the apparent simple alloy composition, yield strengths above 2.4 GPa were obtained. The classical nucleation theory approach was used in order to understand the ε → θ transition. Both transformation and misfit strain energies have been considered in order to explain precipitation behaviour during tempering.
AB - Tempered martensitic steels have shown considerable strengthening by controlled precipitation of the transitional ε-carbide, which is precursor to the more stable cementite phase. It is widely accepted in literature that silicon plays a particular role in the aforementioned transformation. In order to gain further insight, studies have been carried out in a spring steel model alloy of composition Fe-0.55C-2.2Si wt.%. Mechanical tests have shown that in the ε → θ transformation regime there is a loss in strength and an increase in ductility. Albeit the apparent simple alloy composition, yield strengths above 2.4 GPa were obtained. The classical nucleation theory approach was used in order to understand the ε → θ transition. Both transformation and misfit strain energies have been considered in order to explain precipitation behaviour during tempering.
KW - Carbide
KW - Martensite
KW - Misfit
KW - Silicon
KW - Tempering
M3 - Conference contribution/Paper
AN - SCOPUS:84869044011
SN - 9781935117278
SP - 287
EP - 294
BT - AIST Steel Properties and Applications Conference Proceedings - Combined with MS and T'12, Materials Science and Technology 2012
T2 - 2012 AIST Steel Properties and Applications Conference, Held in Conjunction with the Materials Science and Technology 2012 Conference and Exhibition, MS and T 2012
Y2 - 7 October 2012 through 11 October 2012
ER -