Influence of phosphorus on the properties of Fe-Mn damping alloy
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摘要: Fe-Mn基阻尼合金是近些年来发现的一种新型金属阻尼材料。以Fe-Mn基阻尼合金为研究对象，对经不同固溶温度（800、900、1000 ℃）处理后的Fe-Mn、Fe-Mn-P阻尼合金的力学性能、耐蚀性能、阻尼性能进行了测试，利用EBSD进行了显微组织结构表征。结果表明：磷元素添加提高了阻尼合金的屈服强度，有利于提高合金的耐腐蚀性能，但极大地恶化了阻尼合金的低温韧性，降低了阻尼合金的阻尼性能。在800 ℃固溶状态下，Fe-Mn-P合金阻尼性能最佳，随着固溶温度的升高，Fe-Mn-P阻尼合金强度降低，阻尼性能降低；ε/ε和ε/γ界面密度是影响Fe-Mn-P阻尼合金阻尼性能的重要因素。Abstract: Fe-Mn damping alloy is a new type of metal damping material discovered in recent years. This paper takes Fe-Mn damping alloy as the research object. The mechanical properties, corrosion resistance and damping properties of the alloy were tested, and the microstructure was characterized by EBSD. The addition of phosphorus increases the yield strength of the damping alloy, which is beneficial to improve the corrosion resistance, but greatly deteriorates the low-temperature toughness and reduces the damping. With the increase of solid solution treatment temperature, the strength and damping of Fe-Mn-P damping alloy decrease; the damping of Fe-Mn-P alloy is the best at 800 ℃. ε/ε and ε/γ interface density is an important factor affecting the damping of Fe-Mn-P alloy.
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Key words:
- damping alloy /
- phosphorus /
- solid solution treatment temperature /
- strength /
- interface density /
- damping
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图 2 经不同温度固溶处理后阻尼合金的EBSD-BC图
Figure 2. EBSD-BC images of damping alloys after solution treatment at different temperatures
图 3 经不同温度固溶处理后阻尼合金的EBSD-Phase图
Figure 3. EBSD-phase images of damping alloys after solution treatment at different temperatures
图 4 经不同温度固溶处理后Fe-Mn-P阻尼合金的界面密度
Figure 4. Interfacial density of Fe-Mn-P damping alloy after solution treatment at different temperatures
图 5 经不同温度固溶处理后合金阻尼性能随应变振幅的变化
Figure 5. Variation of damping properties of alloys with strain amplitude after solution treatment at different temperatures
图 6 阻尼合金在模拟工业大气环境中电化学腐蚀试验: (a)自腐蚀电位; (b)交流阻抗谱
Figure 6. Electrochemical corrosion test of damping alloy in simulated industrial atmosphere: (a) self-corrosion potential and (b) AC impedance spectra
图 7 经不同固溶温度处理后Fe-Mn-P阻尼合金各相比例
Figure 7. Various phase ratios of Fe-Mn-P damping alloys treated at different solution temperatures
表 1 试验用阻尼合金化学成分
Table 1. Chemical compositions of the experimental damping alloy
% 编号 C Mn P S Fe Fe-Mn 0.0050 15.89 0.0050 0.0055 Bal. Fe-Mn-P 0.0080 16.00 0.0790 0.0065 Bal. 
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表 2 经不同固溶温度处理后阻尼合金力学性能
Table 2. Mechanical properties of damping alloys treated at different solution temperatures
编号 固溶温
度/℃屈服强
度/MPa抗拉强
度/MPa断后伸长
率/%AKV2
(−20 ℃)/JFe-Mn 1000 358 685 52.0 176 Fe-Mn-P 1000 382 740 48.5 16 Fe-Mn-P 900 383 744 46.0 10 Fe-Mn-P 800 390 761 46.0 10
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