Influence of heat treatment on complex-shape rotating disk subjected to isothermal precision forging

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• 作者：Yanqiu Zhang ; Shuyong Jiang ; Xiaoming Zhu…
• 关键词：Aluminum alloy ; Heat treatment ; Isothermal precision forging ; Mechanical property ; Microstructure
• 刊名：Journal of Mechanical Science and Technology
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：31
• 期：1
• 页码：141-147
• 全文大小：
• 刊物类别：Engineering
• 刊物主题：Mechanical Engineering; Vibration, Dynamical Systems, Control; Industrial and Production Engineering;
• 出版者：Korean Society of Steel Construction
• ISSN：1976-3824
• 卷排序：31

文摘

Influence of heat treatment on the mechanical properties of the forging was systematically investigated according to tensile test, hardness test and electrical conductivity test. Simultaneously, typical microstructures of the 7A09 aluminum alloy samples subjected to various solution temperatures and aging regimes were characterized by means of Transmission electron microscope (TEM) and Scanning electron microscope (SEM). In the case of the different solution temperatures, the size of precipitations increases with the increase in the solution temperature, which contributes to improving both strength and stress corrosion resistance of the forging. The solution temperature of 465 °C leads to the well comprehensive mechanical properties and the superior stress corrosion resistance of the forging. G.P. zone, η' phase and η phase are able to precipitate in the matrix of the forging in the case of different aging regimes, such as peak aging, two-stage overaging, two-stage aging, and regression and re-aging. The precipitation phases play an important role in enhancing the mechanical properties of the forging as an obstacle against the dislocation movement.