Abstract
The paper analyzes work hardening behavior of T105Mn120 Hadfield steel under dynamic conditions. The specimens were investigated under two states: (a) untreated (as cast) and (b) solution treated to 1100 °C. Dynamic flexural behavior was examined by means of three-point-bending tests performed with a dynamic mechanical analyser (DMA), and structural analysis was done by x-ray diffraction, optical and scanning electron microscopy; DMA tests were performed under two variants: (a) temperature scans, between − 150 and 400 °C and (b) isothermal strain sweeps, up to 0.15% strain amplitudes. The former emphasized the critical temperatures of thermally induced reversible martensitic transformation and antiferromagnetic–paramagnetic phase transition, while the latter enabled to monitor the storage modulus increase due to the work hardening caused by dynamic bending. Strain sweeps tests revealed the effects of both dynamic bending frequency and number of cycles. The largest work hardening effect, obtained after five strain sweep cycles applied at the frequency of 5 Hz, was associated with the finest distribution of precipitated carbides, observed by differential scanning calorimetry and the formation of slip micro-bands, illustrated on OM micrographs and SEM energy dispersion spectroscopy maps.
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This research work was supported by UEFISCDI through Project Codes PN-II-PT-PCCA-2011-3.1-0174, Contract Nos. 144/ 2.07.2012 and PN-III-P4-ID-PCE-2012-0468, Contract No. 76/ 2017.
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Bulbuc, V., Pricop, B., Maxim, F. et al. Influence of Dynamic Three Point Bending on the Work Hardening Capacity of T105Mn120 Manganese Steel. J. of Materi Eng and Perform 27, 6127–6134 (2018). https://doi.org/10.1007/s11665-018-3658-2
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DOI: https://doi.org/10.1007/s11665-018-3658-2