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Stochastic finite element model calibration based on frequency responses and bootstrap sampling

Majid Khorsand Vakilzadeh (Institutionen för tillämpad mekanik, Dynamik) ; Vahid Yaghoubi (Institutionen för tillämpad mekanik, Dynamik ; Svenskt VindkraftsTekniskt Centrum (SWPTC)) ; Anders T Johansson (Svenskt VindkraftsTekniskt Centrum (SWPTC) ; Institutionen för tillämpad mekanik, Dynamik) ; Thomas Abrahamsson (Svenskt VindkraftsTekniskt Centrum (SWPTC) ; Institutionen för tillämpad mekanik, Dynamik)
Mechanical systems and signal processing (0888-3270). Vol. 88 (2017), p. 180–198.
[Artikel, refereegranskad vetenskaplig]

Chemical and topological parameters have been widely used for predicting the phase selection in high-entropy alloys (HEAs). Nevertheless, previous studies could be faulted due to the small number of available data points, the negligence of kinetic effects, and the insensitivity to small compositional changes. Here in this work, 92 TiZrHfM, TiZrHfMM, TiZrHfMMM (M = Fe, Cr, V, Nb, Al, Ag, Cu, Ni) HEAs were prepared by melt spinning, to build a reliable and sufficiently large material database to inspect the robustness of previously established parameters. Modification of atomic radii by considering the change of local electronic environment in alloys, was critically found out to be superior in distinguishing the formation of amorphous and crystalline alloys, when compared to using atomic radii of pure elements in topological parameters. Moreover, crystal structures of alloying element were found to play an important role in the amorphous phase formation, which was then attributed to how alloying hexagonal-close-packed elements and face-centered-cubic or body-centered-cubic elements can affect the mixing enthalpy. Findings from this work not only provide parametric studies for HEAs with new and important perspectives, but also reveal possibly a hidden connection among some important concepts in various fields.



Denna post skapades 2016-11-29. Senast ändrad 2017-07-06.
CPL Pubid: 245712

 

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Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Dynamik (1900-2017)
Svenskt VindkraftsTekniskt Centrum (SWPTC)

Ämnesområden

Hållbar utveckling
Teknisk mekanik

Chalmers infrastruktur