固溶处理对ZK系镁合金力学及阻尼性能的影响
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摘要
采用光学显微镜、X射线衍射仪、显微硬度计、拉伸试验以及动态热机械分析仪等研究了固溶处理对ZK系(ZK21,ZK40,ZK60)镁合金组织、力学及阻尼性能的影响。结果表明:经固溶处理后,ZK系合金的晶粒尺寸略有长大,第二相溶解、晶格畸变增加。晶界处脆性相的溶解产生的固溶强化效应导致固溶态合金的抗拉强度和显微硬度明显高于铸态。固溶处理后合金的与应变振幅无关阻尼下降、与应变振幅相关阻尼上升,且临界应变振幅明显增大。同一应变振幅下固溶态合金阻尼性能低于铸态;第二临界应变振幅(ε_(cr2))增大使固溶态ZK系合金可以在更大应变振幅范围下使用。ZK系镁合金上述阻尼性能的变化可以用Granato-Lücke理论和塑性阻尼理论来解释。
Effects of solution treatment on microstructure,mechanical properties and damping capacity of ZK series( ZK21,ZK40,ZK60)magnesium alloys were investigated by using optical microscopy,X-ray diffraction,microhardness testing,tensile testing and the dynamic mechanical analyzer( DMA). The results show that the grain size of the ZK alloys increases slightly,the second phases dissolve and the lattice distortion increases after solution treatment. The tensile strength and microhardness of the solution treated alloys are significantly higher than that of as-cast alloys due to dissolution of the brittle phase and solution strengthening. After solution treatment,the amplitudeindependent damping declines,the amplitude-dependent damping increases and the critical strain amplitude enhances significantly. The damping capacity of the solution treated alloys is lower than that of the as-cast alloys under the same strain amplitude. The higher second critical strain amplitude( ε_(cr2)) of the solution treated ZK alloys indicates that the alloys can be used in the larger strain amplitude range.Damping capacities of the ZK alloys at different conditions can be explained by the Granato-Lücke theory and the plastic damping theory.
Effects of solution treatment on microstructure,mechanical properties and damping capacity of ZK series( ZK21,ZK40,ZK60)magnesium alloys were investigated by using optical microscopy,X-ray diffraction,microhardness testing,tensile testing and the dynamic mechanical analyzer( DMA). The results show that the grain size of the ZK alloys increases slightly,the second phases dissolve and the lattice distortion increases after solution treatment. The tensile strength and microhardness of the solution treated alloys are significantly higher than that of as-cast alloys due to dissolution of the brittle phase and solution strengthening. After solution treatment,the amplitudeindependent damping declines,the amplitude-dependent damping increases and the critical strain amplitude enhances significantly. The damping capacity of the solution treated alloys is lower than that of the as-cast alloys under the same strain amplitude. The higher second critical strain amplitude( ε_(cr2)) of the solution treated ZK alloys indicates that the alloys can be used in the larger strain amplitude range.Damping capacities of the ZK alloys at different conditions can be explained by the Granato-Lücke theory and the plastic damping theory.
引文
[1]戴得沛.阻尼技术的工程应用[M].北京:清华大学出版社,1991:3-15.Dai Depei.Engineering Application of Damping Technology[M].Beijing:Tsinghua University Press,1991:3-15.
[2]Liu Z L,Liu X Q,Shen P,et al.Effect of ball-milling parameter on mechanical and damping properties of sintered Mg-Zr alloy[J].Transactions of Nonferrous Metals Society of China,2010,20(11):2092-2095.
[3]张佳,朱红梅,吴炜.轧制变形对Mg-0.6Zr合金阻尼性能的影响[J].热加工工艺,2014(14):53-55.Zhang Jia,Zhu Hongmei,Wu Wei.Effect of rolling on damping capacity of Mg-0.6Zr alloy[J].Hot Working Technology,2014(14):53-55.
[4]马永栋,潘安霞,马立群,等.锌含量对铸造镁锌锆合金阻尼及力学性能的影响[J].机械工程材料,2013,37(2):21-24.Ma Yongdong,Pan Anxia,Ma Liqun,et al.Effect of Zn content on mechanical and damping properties of cast Mg-Zn-Zr alloys[J].Materials For Mechanical Engineering,2013,37(2):21-24.
[5]李吉庆,刘洋,赵新玲,等.Al含量对镁锂合金α-Mg相晶格常数及微观应变的影响[J].应用科技,2011,38(12):55-60.Li Jiqing,Liu Yang,Zhao Xinling,et al.Effects of Al content on the lattice parameter and microstrain ofα-Mg phase in Mg-Li alloys[J].Applied Science and Technology,2011,38(12):55-60.
[6]张文鑫,孙毅,许春香,等.固溶处理对Mg-Zn-Y-Zr-Ca生物镁合金微观组织和力学性能的影响[J].材料热处理学报,2017,38(6):61-66.Zhang Wenxin,Sun Yi,Xu Chunxiang,et al.Effect of solution treatment on microstructure and mechanical properties of Mg-Zn-Y-ZrCa biological magnesium alloy[J].Transactions of Materials and Heat Treatment,2017,38(6):61-66.
[7]Granato A,Lücke K.Theory of mechanical damping due to dislocations[J].Journal of Applied Physics,1956,27(6):583-593.
[8]Granato A,Lücke K.Application of dislocation theory to internal friction phenomena at high frequencies[J].Journal of Applied Physics,1956,27:789-805.
[9]Peguin P,Perez J,Gobin P.Amplitude-dependent part of the internal friction of aluminum[J].Trans Metall Soc AIME,1967,239:438-450.
[2]Liu Z L,Liu X Q,Shen P,et al.Effect of ball-milling parameter on mechanical and damping properties of sintered Mg-Zr alloy[J].Transactions of Nonferrous Metals Society of China,2010,20(11):2092-2095.
[3]张佳,朱红梅,吴炜.轧制变形对Mg-0.6Zr合金阻尼性能的影响[J].热加工工艺,2014(14):53-55.Zhang Jia,Zhu Hongmei,Wu Wei.Effect of rolling on damping capacity of Mg-0.6Zr alloy[J].Hot Working Technology,2014(14):53-55.
[4]马永栋,潘安霞,马立群,等.锌含量对铸造镁锌锆合金阻尼及力学性能的影响[J].机械工程材料,2013,37(2):21-24.Ma Yongdong,Pan Anxia,Ma Liqun,et al.Effect of Zn content on mechanical and damping properties of cast Mg-Zn-Zr alloys[J].Materials For Mechanical Engineering,2013,37(2):21-24.
[5]李吉庆,刘洋,赵新玲,等.Al含量对镁锂合金α-Mg相晶格常数及微观应变的影响[J].应用科技,2011,38(12):55-60.Li Jiqing,Liu Yang,Zhao Xinling,et al.Effects of Al content on the lattice parameter and microstrain ofα-Mg phase in Mg-Li alloys[J].Applied Science and Technology,2011,38(12):55-60.
[6]张文鑫,孙毅,许春香,等.固溶处理对Mg-Zn-Y-Zr-Ca生物镁合金微观组织和力学性能的影响[J].材料热处理学报,2017,38(6):61-66.Zhang Wenxin,Sun Yi,Xu Chunxiang,et al.Effect of solution treatment on microstructure and mechanical properties of Mg-Zn-Y-ZrCa biological magnesium alloy[J].Transactions of Materials and Heat Treatment,2017,38(6):61-66.
[7]Granato A,Lücke K.Theory of mechanical damping due to dislocations[J].Journal of Applied Physics,1956,27(6):583-593.
[8]Granato A,Lücke K.Application of dislocation theory to internal friction phenomena at high frequencies[J].Journal of Applied Physics,1956,27:789-805.
[9]Peguin P,Perez J,Gobin P.Amplitude-dependent part of the internal friction of aluminum[J].Trans Metall Soc AIME,1967,239:438-450.