Investigation on the microstructure and tensile behavior of a Ni-based IN792 superalloy

Beining Du,Liyuan Sheng,Jinxia Yang,Chuanyong Cui,Xiaofeng Sun,Ziyang Hu

doi:10.1177/1687814017752167

Abstract

The Ni-based IN792 superalloy is widely used in aeroengine components because of its low manufacturing cost and good mid-temperature (600°C–900°C) properties. However, its mechanical properties exh...

Highlights

Ni-based polycrystalline superalloy is widely used in industrial turbine and aeroengine components which serve at mediate temperatures (600°C–900°C) for its good mid-temperature properties and relative low manufacturing cost.[1,2] to ensure its long-term service at critical conditions of temperature and stress, a wide range of alloying elements, such as Cr, Mo, andAl, are usually added in Ni-based polycrystalline superalloy.[3,4] the microstructure of the polycrystalline superalloy becomes complicated with the co-existence of g, g#, carbide, boride, eutectic, topologically closepacked (TCP) phases, and so on.[5]
The MC carbide and g/g# eutectic structure are randomly distributed in the interdendritic region and at the grain boundary, as exhibited in Tensile property of IN792 superalloy
As the tensile temperature increases to 760°C and 850°C, the elongation and reduction of area increase greatly and achieve the largest values, but they decrease as the temperature increases to 900°C

Summary

Introduction

Ni-based polycrystalline superalloy is widely used in industrial turbine and aeroengine components which serve at mediate temperatures (600°C–900°C) for its good mid-temperature properties and relative low manufacturing cost.[1,2] to ensure its long-term service at critical conditions of temperature and stress, a wide range of alloying elements, such as Cr, Mo, andAl, are usually added in Ni-based polycrystalline superalloy.[3,4] the microstructure of the polycrystalline superalloy becomes complicated with the co-existence of g, g#, carbide, boride, eutectic, topologically closepacked (TCP) phases, and so on.[5]. Ni-based polycrystalline superalloy is widely used in industrial turbine and aeroengine components which serve at mediate temperatures (600°C–900°C) for its good mid-temperature properties and relative low manufacturing cost.[1,2] to ensure its long-term service at critical conditions of temperature and stress, a wide range of alloying elements, such as Cr, Mo, and. Ni-based IN792 superalloy is a typical g# phase strengthening superalloy and has high strength and excellent hot corrosion resistance at mid-temperature, which makes it widely used in industrial turbine and aircraft engine components, as shown in Figure 1.6–9 In order to strengthen the grain boundary, C, B, and Zr were simultaneously added in IN792 superalloy. Tensile behavior is an important index for evaluating the mechanical properties of superalloy.[12,13,14] Through tensile test, the strength and ductility of superalloys can be obtained, and its mechanical performance can be evaluated preliminarily

Results

Discussion

Conclusion