Serration, deformation band propagation and strain marking in a 5083 aluminum alloy at low temperature
Serration, deformation band propagation and strain marking in a 5083 aluminum alloy at low temperature
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5083 铝合金低温下的锯齿、变形带传播和应变打标
DOI：
10.2464/jilm.56.39
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
Masanobu Furuta
中科院分区：
文献类型：
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作者：
Y. Nakayama;Kyohei Nomura;Masanobu Furuta
研究了在较低温度下产生的非均匀塑性变形中载荷波动与变形带几何形状及扩展行为之间的关系。通过应变片和试件表面粗糙度测试，分析了变形带的几何形状和扩展行为。利用快速傅立叶变换方法对负荷波动进行了定量分析。获得了以下结果。在两个变形区域观察到波浪形载荷波动;即，其中一个为屈服变形区，另一个为锯齿变形区。各变形区变形带的几何形状和倾角相似，但循环次数、扩展速度和应变增量不同。然而，它清楚地表明，在每个变形区域中产生的波浪形载荷波动是由于变形带的连续扩展。
Relations among load fluctuation, geometrical shape and propagation behavior of a deformation band were examined for an inhomogeneous plastic deformation generated at relatively low temperature. The geometrical shape and propagation behavior of the deformation band were evaluated by strain gauges and surface roughness of specimen. Quantitative analysis of the load fluctuation was also carried out by fast Fourier transform method. The following results were obtained. A wavy load fluctuation was observed in two-deformation regions; i.e., one of which was a yield deformation region and the other was a serration one. The geometrical shape and the tilt of the deformation band in each deformation region were similar, while the number of cycles, the velocity of propagation and the amount of increasing strain were different each other. However, it was clearly shown that the wavy load fluctuation generated in each deformation region resulted from a continuous propagation of the deformation band.