Effect of Tempered Martensite on Magnetomechanical Damping of Ferritic Matrix Dual Phase Alloys

Abstract

Abstract: The influence of the volume fraction of tempered martensite on magnetomechanical damping of the ferritic matrix in dual-phase alloys was studied.The experimental results showed that(1) dual-phase damping alloy is of good combination of strength and toughness: (2)good damping ca- pacity(Q~(-1)≥5.0×10~(-3))can be obtained in dual-phase alloys only when the volume fraction of tempered martensite was controlled properly.The effect of martensite on magnetomechanical damp- ing of the ferritic matrix was analysed.The damping capacity of dual-phase alloys was related to the volume fraction V_m of tempered martensite by Q_~(-1)=Q_~(-1) (1-V_m/1+BV_m)at small vibration strain amplitudes ε_A≤5.0×10~(-6).

Key words: martensite, damping, dual-phase alloys

Junsheng LU Xiaodong LIU Wenjie ZHENG Baorong WU Hui BI Central Iron and Steel Research Institute,Beijing,100081,ChinaGuijin WANG Dept.of Materials Science and Engineering,University of Pennsylvania,Philadelphia,PA 19104,USA. Effect of Tempered Martensite on Magnetomechanical Damping of Ferritic Matrix Dual Phase Alloys[J]. J Mater Sci Technol, 1993, 9(4): 293-296.

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Effect of Tempered Martensite on Magnetomechanical Damping of Ferritic Matrix Dual Phase Alloys

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