Development of ferrous-based weldable seismic damping alloy with prolonged plastic fatigue life
Development of ferrous-based weldable seismic damping alloy with prolonged plastic fatigue life
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DOI：
10.1016/j.scriptamat.2021.113815
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发表时间：
2021-05
影响因子：
6
通讯作者：
Fumiyoshi Yoshinaka;T. Sawaguchi;S. Takamori;Terumi Nakamura;G. Arakane;Yasuhiko Inoue;S. Motomura;A. Kushibe
中科院分区：
文献类型：
--
作者：
Fumiyoshi Yoshinaka;T. Sawaguchi;S. Takamori;Terumi Nakamura;G. Arakane;Yasuhiko Inoue;S. Motomura;A. Kushibe
通过控制凝固和疲劳变形过程中的相变行为，研制了一种新型的可焊Fe-Mn-Cr-Ni-Si高抗疲劳抗震阻尼合金。通过改变Cr/Ni比来控制凝固相变，诱导铁素体-奥氏体相变，从而降低凝固开裂敏感性。优化了奥氏体和ε-马氏体之间的吉布斯自由能差，使其在疲劳变形过程中呈现可逆转变。所得到的合金具有较长的疲劳寿命，并且在熔融运行焊接试验中未观察到凝固裂纹。采用新研制的合金，可制成具有优良抗疲劳性能的焊接阻尼器。
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.