Investigation of PLC band nucleation in AA5754
Investigation of PLC band nucleation in AA5754
复制标题
DOI：
10.1016/j.msea.2012.01.082
复制
发表时间：
2012-03
期刊：
影响因子：
6.4
通讯作者：
Xiaoqun Feng;Gottfried Fischer;R. Zielke;B. Svendsen;W. Tillmann
中科院分区：
文献类型：
--
作者：
Xiaoqun Feng;Gottfried Fischer;R. Zielke;B. Svendsen;W. Tillmann
本工作的目的是对铝合金AA5754中PLC变形带的形核进行实验研究。用机械方法和红外(IR)热像仪研究了PLC的谱带。后者采用高速红外摄像机，捕捉由于PLC带的成核而引起的机械耗散和加热引起的辐射功率的局部变化。所得到的红外图像被用于通过图像减影来确定时空功率场变化。此外，从红外图像获得的谱带轨迹被用来研究样品中应力和辐射功率的时空演化与PLC谱带发展之间的可能的相关性。
The purpose of the present work is the experimental investigation of the nucleation of PLC deformation bands in the aluminium alloy AA5754. The PLC bands are investigated using both mechanical methods and infrared (IR) thermography. The latter employs a high-speed IR camera which captures local changes of radiated power resulting from mechanical dissipation and heating due to the nucleation of PLC bands. The resulting IR images are used to determine spatio-temporal power field variations via image subtraction. Furthermore, band trajectories obtained from the IR images are used to study possible correlations between the spatio-temporal evolution of stress and radiated power in the specimens and PLC band development.