The effect of grain size on the damping capacity of Fe-17 wt%Mn
The grain size dependence of the damping capacity of Fe-17 wt%Mn steel was investigated. A high damping capacity was measured in the ultra-fine grained steel, despite its lower volume fraction of ε martensite and lower density of ε variant boundaries and ε/y phase boundaries. Dilatometry of the ultr...
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Veröffentlicht in: | Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2017-01, Vol.683, p.187-194 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The grain size dependence of the damping capacity of Fe-17 wt%Mn steel was investigated. A high damping capacity was measured in the ultra-fine grained steel, despite its lower volume fraction of ε martensite and lower density of ε variant boundaries and ε/y phase boundaries. Dilatometry of the ultra-fine grained Fe-17 wt%Mn steel revealed that the ε⇔y phase transformation was largely suppressed. The features of the damping spectra were related to the anti-ferromagnetic transition in the y phase, the thermo-elastic ε⇔y phase transformation and the motion of grain boundaries in the ultra-fine grained microstructure. The damping spectrum of the ultra-fine grained Fe-17 wt%Mn steel was dominated by grain boundary damping effects. |
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ISSN: | 0921-5093 1873-4936 |
DOI: | 10.1016/j.msea.2016.10.079 |