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Chapter and Conference Paper
Heat Treatment Design of Inconel 740H Superalloy for Microstructure Stability and Creep Properties Enhancement
In this study, conditions selected from various heat treatment candidates , which are considered as materials for A-USC steam turbines, were exposed to long-term thermal conditions at 750 ℃ up to 5,000 h. T...
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Article
Modeling the Stress–Strain Curves and Dynamic Recrystallization of Nickel-Based A230 Alloy During Hot Deformation
The stress–strain curves and recrystallization behavior of materials during high-temperature deformation can generally be modeled using the Zener–Hollomon parameters expressed as a function of strain, temperat...
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Article
Influence of Segregation on Microstructure and Hot Workability of Grade 250 Maraging Steel
The optimal process parameters of grade 250 maraging steel for hot forging were investigated with a process map and microstructure analysis. To generate the process map, hot compression tests were performed at...
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Article
Statistics of oxidation resistance of Ni–(0–15)Co–(8–15)Cr–(0–5)Mo–(0–10)W–(3–8)Al–(0–5)Ti–(0–10)Ta–0.1C–0.01B superalloys at 1000 °C by compositional variations
The effects of alloying elements (Co, Cr, Mo, W, Al, Ti, and Ta) on the oxidation resistance of Ni–(0–15)Co–(8–15)Cr–(0–5)Mo–(0–10)W–(3–8)Al–(0–5)Ti–(0–10)Ta–0.1C–0.01B alloys were studied. The sample composit...
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Article
Effect of minor alloying elements La, C and B on the cyclic oxidation behavior of Ni-Cr-W-Mo superalloys
The cyclic oxidation behavior of Ni-Cr-W-Mo base alloys with various La, C and B contents is investigated at 1150 °C in ambient air with 15 min of high-temperature exposure and 5 min of air cooling. Oxidation ...
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Article
Effects of γ′ Precipitation, Dislocation Density, and Grain Size on Stress-Relaxation Properties of INCONEL X-750 Helical Springs
INCONEL X-750 specimens were manufactured into helical springs by drawing and coiling followed by aging. They were subsequently subjected to stress-relaxation tests. Stress relaxation is the important property...
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Article
High temperature oxidation resistance of Ni-(5∼13)Co-(10∼16)Cr-(5∼9)W-5Al-(1∼1.5)Ti-(3∼6)Ta alloys
The oxidation behavior of Ni-based superalloys was examined by cyclic oxidation tests at 850 and 1000 °C. The present study focused on the investigation of two newly developed and three commercial alloys (GTD-...
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Article
Electrochemical corrosion of novel beta titanium alloys
Electrochemical corrosion behaviors of novel beta titanium alloys, Ti−30Ta−10Nb−10Zr, Ti−40Ta−10Nb−10Zr and Ti−40Ta−10Nb−4Sn were characterized in naturally aerated Hank's solution at 37°C compared with curren...
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Article
Elastic modulus and in vitro biocompatibility of Ti−xNb and Ti−xTa alloys
The effect of niobium and tantalum on the elastic modulus and the in vitro biocompatibility in binary titanium alloys was studied. The Young's modulus of titanium was effectively lowered with additions of Nb o...
