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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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Published in: | Scripta materialia 2021-05, Vol.197, p.113815, Article 113815 |
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container_start_page | 113815 |
container_title | Scripta materialia |
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creator | Yoshinaka, Fumiyoshi Sawaguchi, Takahiro Takamori, Susumu Nakamura, Terumi Arakane, Goro Inoue, Yasuhiko Motomura, Susumu Kushibe, Atsumichi |
description | 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.
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doi_str_mv | 10.1016/j.scriptamat.2021.113815 |
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subjects | Damping Fatigue Iron alloys Solidification microstructure Welding |
title | Development of ferrous-based weldable seismic damping alloy with prolonged plastic fatigue life |
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