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| Mechanical Spectroscopy Characterization of Forming Property of Automobile Steel Sheets |
| YU Ning1,LIU Yonggang2,ZHANG Zhibo1,ZHAN Hua2,ZHANG Jian2，JI Jingwen1 |
| (1. Research Institute of Materials Physics and Chemistry, College of Sciences, Northeastern University, Shenyang 110004, China; 2. Technological Center, Maanshan Iron & Steel Co, Ltd, Maanshan 243000, Anhui, China) |
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Abstract The internal friction in low carbon aluminium killed DC01 automobile steel sheets, which are of normal without superlower yield point, and of inhomogeneous stamping deformation containing Lüders bands and/or orange skin, were measured from room temperature to 350°C. It is found that for the automobile sheets with different stamping performancies their mechanical spectra have obviously different characterstics. There is a mechanical spectrum with three small peaks for the normal sheet, and there appears a doublepeak spectrum in which the two peaks are all obviously high for the sheet with Lüders bands, and there is a multipeak spectrum having 4 to 5 very small peaks for the sheet with orange skin. The discussion on the nature of the damping peaks and the characteristic of the mechanical spectra was made.
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Received: 24 March 2009
Published: 31 May 2010
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