Comment on "Origin of low-temperature shoulder internal friction peak of Snoek–Köster peak in a medium carbon high alloyed steel" by Lu et al. [Solid State Communications 195 (2014) 31]. (January 2016)

• Record Type: Journal Article
• Authors: Hoyos, J.J.; Mari, D.
• Is Part Of: Solid state communications. Volume 226(2016)
• Page Start: 51
• Page End: 53
• Publication Date: 2016-01
• Subjects: D. Athermal background -- D. Interstitial carbon -- D. Transition carbide precipitation -- E. Mechanical spectroscopy; Solid state chemistry -- Periodicals; Solid state physics -- Periodicals; Chimie de l'état solide -- Périodiques; Physique de l'état solide -- Périodiques; 530.41
• DOI: 10.1016/j.ssc.2015.11.009
• Languages: English
• ISSNs: 0038-1098

Abstract

Abstract: We want to discuss the interpretation of low-temperature shoulder internal friction peak of Snoek-Köster peak (LTS-SK). Lu et al. (2015)[1] attributed it to the interaction between the carbon atoms and twin boundaries in martensite. Nevertheless, the decrease of the amplitude of LTS-SK peak due to carbon segregation is correlated with the interstitial carbon content in solid solution in martensite (Hoyos et al., 2015[2] ). Therefore, this peak can also be attributed to the presence of an internal friction athermal background, which is proportional to the concentration of interstitial carbon in solid solution (Tkalcec et al., 2015[2, 3] ). In addition, they used an alloyed steel, in which ε carbide precipitated above of the LTS-SK peak temperature. As this behavior cannot be generalized for carbon and high alloyed steels, the carbide precipitates could made an additional contribution to the internal friction. Highlights: Origin of the LTS-SK internal friction peak. The amplitude of LTS-SK peak is correlated with interstitial carbon in solid solution. LTS-SK peak can be attributed to an athermal background. The transition carbides precipitates could also contribute to the LTS-SK peak.