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| Amplitude Effect of Internal Friction in γ-MnFe Alloys |
| GU Suyi1,ZHANG Jihua2 |
| (1.Department of Mechanoelectronic Engineering, Suzhou Vocational University, Suzhou 215104, Jiangsu, China; 2.School of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai 200030, China) |
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Abstract An investigation was made regarding the variation in internal friction and modulus with 86.4%Mn and 80.8%Mn γMnFe alloys. The results indicate that γMnFe alloys undergo paramagnetic to antiferromagnetic transition and martensitic transformation while cooling from high temperature. There are three internal friction peaks during this process and they all have amplitude effect. It confirms that the twins caused by anteferromagnetic transition and martensitic transformation are the physical nature of high damping capacity of γMnFe alloys.
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Received: 05 May 2009
Published: 31 May 2010
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