کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1613761 | 1005601 | 2013 | 4 صفحه PDF | دانلود رایگان |

Quenching and Partitioning (Q&P) treatment is a novel process to produce advanced high-strength steel. It is relatively difficult to investigate kinetic processes of the partitioning which normally complete after tens of seconds. Since the Mf (martensitic transformation finish temperature) of medium-carbon steels with high Ni content (9.8 wt%) is under room temperature, the kinetics of carbon partitioning can be studied around room temperature. In this study the carbon partitioning for a high Ni steel was investigated by means of Differential Scanning Calorimetry (DSC), Dynamic Mechanical Analyzer (DMA) and X-ray Diffraction (XRD). The activation energy of carbon partitioning estimated from the DSC is 1.02 eV (98 kJ/mol) which is comparable with DMA result. The frequency dependence anelastic peaks observed in DMA measurement was also discussed in correlation with Snoek-Koster-like relaxation in high strength steels containing considerable residual austenite and martensite phases.
► Partitioning of medium-carbon steels with high Ni content (9.8 wt%) was studied.
► Kinetics of partitioning was investigated by Dynamic Mechanical Analyzer.
► Frequency dependent feature was correlated with Snoek-Koster-like relaxation.
Journal: Journal of Alloys and Compounds - Volume 577, Supplement 1, 15 November 2013, Pages S72–S75