【作者】 于宁； 刘永刚； 张志波； 詹华； 张建； 戢景文；

【Author】 YU Ning~1,LIU Yong-gang~2,ZHANG Zhi-bo~1,ZHAN Hua~2,ZHANG Jian~2,JI Jing-wen~1(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)

【机构】 东北大学理学院材料物理与化学研究所； 马鞍山钢铁股份有限公司技术中心；

【摘要】 测量了未出现上下屈服点的常规汽车钢板和出现冲压变形滑移带、"橘皮"等不均匀变形钢板在室温至350°C的内耗,并对钢板阻尼峰的本质和力学谱特征进行分析.结果表明,冲压性能不同的钢板内耗谱明显不同.常规钢板的内耗曲线上出现了3个较小的内耗峰;出现冲压变形滑移带的钢板中呈现出2个较高的内耗峰;而出现"橘皮"的钢板中则呈现出4~5个很小的内耗峰.更多还原

【Abstract】 The internal friction in low carbon aluminium killed DC01 automobile steel sheets,which are of normal without super-lower 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 double-peak spectrum in which the two peaks are all obviously high for the sheet with Lüders bands,and there is a multi-peak 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.更多还原