Development of ferrous-based weldable seismic damping alloy with prolonged plastic fatigue life

A new weldable Fe-Mn-Cr-Ni-Si seismic damping alloy with high fatigue resistance was developed by controlling phase transformation behaviour during both solidification and fatigue deformation. The solidification phase transformation was controlled by changing the Cr/Ni ratio to induce ferrite-austen...

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Bibliographic Details
Published in:Scripta materialia 2021-05, Vol.197, p.113815, Article 113815
Main Authors: Yoshinaka, Fumiyoshi, Sawaguchi, Takahiro, Takamori, Susumu, Nakamura, Terumi, Arakane, Goro, Inoue, Yasuhiko, Motomura, Susumu, Kushibe, Atsumichi
Format: Article
Language:English
Subjects:
Damping
Fatigue
Iron alloys
Solidification microstructure
Welding
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Summary:A new weldable Fe-Mn-Cr-Ni-Si seismic damping alloy with high fatigue resistance was developed by controlling phase transformation behaviour during both solidification and fatigue deformation. The solidification phase transformation was controlled by changing the Cr/Ni ratio to induce ferrite-austenite transformation and thus reduce the solidification cracking susceptibility. The Gibbs free energy difference between the austenite and ε-martensite was optimized to exhibit reversible transformation during fatigue deformation. The resultant alloy exhibited a prolonged fatigue life, and no solidification cracking was observed in a melt-run welding test. By using the newly developed alloy, a weld damper with excellent fatigue resistance can be fabricated. [Display omitted]
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2021.113815