-
Article
Study on tungsten sintering temperature field based on electromagnetic simulation and computational fluid dynamics
In order to study the influence of various sintering variables more intuitively and clearly, electromagnetic field analysis and computational fluid dynamics are used to analyze the influence of gas flow, heati...
-
Article
A new insight into rapid oxidation of alloy 925 contaminated by oxide powder
Rapid oxidation takes place both in the laboratory and in industrial conditions when alloy 925 is contaminated by oxide powder, and the oxidation rate is much higher than normal. Herein, the rapid oxidation be...
-
Article
Mechanism of high-temperature oxidation effects in fatigue crack propagation and fracture mode for FGH97 superalloy
The high-temperature fatigue crack growth behaviors in powder metallurgy (P/M) Ni-based superalloy FGH97 for turbine disk application were investigated at different temperatures (650, 700 and 800 °C) in air us...
-
Article
Microstructure and homogenization process of as-cast GH4169D alloy for novel turbine disk
To investigate the microstructure, segregation, and suitable homogenization process of as-cast GH4169D alloy, the microstructure, elements segregation, and precipitates of cast GH4169D ingots prepared by vacuu...
-
Article
Hot corrosion behavior and mechanism of FGH96 P/M superalloy in molten NaCl–Na2SO4 salts
Hot corrosion behavior of FGH96 powder metallurgy (P/M) superalloy in 25 % NaCl + 75 % Na2SO4 molten salts at 650, 700, and 750 °C was investigated in this paper. The methods of mass loss measurement, X-ray diffr...
-
Article
Constitutive behavior and processing maps of low-expansion GH909 superalloy
The hot deformation behavior of GH909 superalloy was studied systematically using isothermal hot compression tests in a temperature range of 960 to 1040°C and at strain rates from 0.02 to 10 s−1 with a height red...
-
Chapter
Development of a New High Strength and Hot Corrosion Resistant Directionally Solidified Superalloy DZ409
Based on the principle of superalloy design, seven alloy compositions for (Industry Gas Turbine) blades application were designed to meet the’ demand for alloy’s properties, like stress rupture, , , etc. T...
-
Article
Nucleation mechanisms of dynamic recrystallization for G3 alloy during hot compression
Dynamic recrystallization (DRX) mechanisms of a nickel-based corrosion-resistant alloy, G3, were investigated by hot compression tests with temperatures from 1050 to 1200 °C and strain rates from 0.1 to 5.0 s−1. ...
-
Article
Hot deformation behavior of uniform fine-grained GH4720Li alloy based on its processing map
The hot deformation behavior of uniform fine-grained GH4720Li alloy was studied in the temperature range from 1040 to 1130°C and the strain-rate range from 0.005 to 0.5 s−1 using hot compression testing. Processi...
-
Article
Open AccessEffect of boron addition on the microstructure and stress-rupture properties of directionally solidified superalloys
This study is focused on the effect of boron addition, in the range of 0.0007wt% to 0.03wt%, on the microstructure and stress-rupture properties of a directionally solidified superalloy. With increasing boron ...
-
Article
Open AccessMicrostructure and stress rupture properties of polycrystal and directionally solidified castings of nickel-based superalloys
A new directionally solidified Ni-based superalloy DZ24, which is a modification of K24 alloy without rare and expensive elemental additions, such as Ta and Hf, was studied in this paper. The microstructure an...
-
Article
Relationship Between Grain Boundary Segregation of Antimony and Temper Embrittlement in Titanium-Doped Nickel-Chromium Steel
The antimony segregation at grain boundary was observed and the temper embrittlement in titanium-doped nickel-chromium steel was analyzed. It is concluded that the antimony segregation at grain boundary is non...
-
Article
Effect of cooling rate on the phase transformation and stability of the mushy zone during the solidification of Waspaloy
Scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDAX) were used to study the microstructure, microsegregation, and fluid flow tendency of the superalloy Waspaloy in the mushy zone, whi...
-
Article
Mechanism of α-Cr precipitation and crystallographic relationships between α-Cr and δ phases in Inconel 718 alloy after long-time thermal exposure
To study the precipitation mechanism of α-Cr phase in Inconel 718 alloy, the samples after long-time aging at 650 and 677°C were examined by microstructural observations and chemical phase analysis methods. Co...
