Temperature-Effect Study on the Fatigue Behavior of Inconel Alloy 617 by in-situ Neutron-Diffraction Investigation

• Main Authors: Bo-Han Wu, 巫柏翰
• Other Authors: E-Wen Huang
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/18958503011160636080

碩士 === 國立中央大學 === 化學工程與材料工程學系 === 102 === Abstract We investigate high temperature creep-fatigue properties of nickel-based superalloy, Inconel 617, by in-situ neutron-diffraction. We examined the microstructure subjected to monotonic and cyclic tensile loading under room temperature, 600˚C and 850˚C, respectively. The variations in microstructure caused by different deformation modes are compared. The trends in macroscopic creep curves subjected to different environmental temperatures show different features. Comparing to classic deformation map, we conclude that different creep stages on this materials is revisited. It is concluded that the main contribution of the increase in creep speed of tertiary creep is due to the increase of dislocation density, but not the variation of the lattice strain.