Effect of Aluminum Addition on Microstructure and Mechanical Properties of Inconel 713LC Superalloy

• Main Authors: ZHANG, GUANG-TING, 張光廷
• Other Authors: WANG, SHEA-JUE
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/uky3hs

碩士 === 國立臺北科技大學 === 材料科學與工程研究所 === 107 === In recent years, global climate anomalies caused by serious air pollution and greenhouse effect have prompted national environmental awareness and national environmental regulations, making turbocharged engines the mainstream of automobile engines. However, the weight of blades in turbines will affect vehicles in high temperature environments. The fuel efficiency used, so this study used the addition of aluminum in the Inconel 713LC alloy to reduce the density to achieve weight reduction effect, and explore the effect of aluminum on the microstructure and mechanical properties of Inconel 713LC alloy. The aluminum content of the Inconel 713LC alloy prepared in this study was 6.14 – 6.75 wt%, respectively. It was found by EDS that aluminum would appear in the precipitate phase and increase the proportion of precipitated phase. As the proportion of the precipitated phase increases, the mechanical properties of the alloy increase, and the effect of precipitation strengthening is achieved. The results of this study show that the addition of aluminum can reduce the density of the alloy, from 7.875 g/cm3 of the original Inconel 713LC to 7.757 g/cm3 of 6.75 wt% of aluminum, which is reduced by about 1.5%; and the high temperature of 982 °C of Inconel 713LC alloy is increased. The tensile strength and the latent life of 982 °C, the best high temperature tensile properties of the test bar is 6.75 wt% aluminum, the tensile strength is increased by 29.3% compared to the base metal; the drop strength is increased by 25.5%. The elongation is reduced by 20.9%; in addition, the test rod with the longest creep life of 982 °C has an aluminum content of 6.14 wt%, which is 33.5% higher than that of the parent metal.