Precipitation Evolution and Mechanical Properties in an Al-Cu alloy as a Function of Environmental Temperatures

• Main Authors: Ming-Hsien Wen, 温明憲
• Other Authors: E-Wen Huang
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/80083092804857082088

碩士 === 國立中央大學 === 化學工程與材料工程學系 === 101 === An experimental investigation, combining synchrotron X-ray diffraction and small-angle scattering to study the microstructure evolution and phase transformation of the precipitation in an Al-Cu superalloy. Upon increasing the temperatures during precipitation process, the dissolution and the nucleation of different phases are characterized. The small-angle X-ray scattering profiles demonstrate the temporal behavior of structural evolution of the precipitates. The X-ray diffraction patterns records the spatial relationship of various precipitates during the phase transformation and reflect the phase transformation of the precipitates during the heating. The present study provides the insight of the phase transformation structural characteristics in the Al-Cu system from the lattice structure to the nano-scale morphological geometry simultaneously. Finally, determine the main structure factor improve the strength of Al-Cu alloy from these microstructure evolution information with temperature. Observe from the results of this study, the main structure factor enhance the strength of Al-Cu alloy is precipitation phase transition.