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Heat treatment and analysis of nickel super alloy for gas turbine applications (1)
1.IntroductionThe high cycle fatigue failures are most commonly occurring in turbine blades of a power plant which is experiencing high temperature heat input from the fuel source [1]. These kind of high cycle fatigue failures are influe...Views -
Stress corrosion of Ni-based superalloys (3)
SEM imaging suggests that the initial combined presence of stress and hot corrosion results in the reaction of the γ’′ precipitates. Cracks then initiate from features similar to corrosion pit features (Figure 7) and propagate through...Views -
Stress corrosion of Ni-based superalloys (2)
Prior to testing, C-ring samples were cleaned in an ultrasonic bath with IPA (isopropyl alcohol). Corrosion exposures were carried out in a horizontal, controlled atmosphere furnace. The corrosion environment, deposit composition and dep...Views -
Stress corrosion of Ni-based superalloys (1)
Introduction Gas turbines are widely used in power generation sys tems. Developments to improve their efficiencies have led to increased operating temperatures of regions of some components, such as the under platform areas of turbine bl...Views -
When To Use Investment Casting
External shaping and tight tolerances existParts are shaped or non-symmetrical with fine detailMultiple and/or intricate internal passageways in designDimensions are small to medium, typically under 1,000 lbs./454 kgExcellent as-cast sur...Views -
Precision investment casting
Precision investment casting involves the manufacture of high-performance molds for casting complex parts. This process requires high precision and zero defects. When it is difficult or impossible to cast parts by other methods, investme...Views -
What are the differences between super stainless steel and nickel-based alloys?
Super stainless steel and nickel-based alloy are a kind of special stainless steel. Firstly, they are different from ordinary stainless steel in chemical composition. They refer to a kind of high-alloy stainless steel with high nickel, h...Views -
Invar™36 precision casting
Alloy 36 is a special low-expansion iron-nickel alloy with ultra-low expansion coefficient. Among them, the control of carbon and manganese components is very important. Cold deformation can reduce the coefficient of thermal expansion, a...Views -
The Influence of Macrostructure of Nickelbased Superalloys Inconel™713C and MAR 247 on the Characteristics of High-temperature Creep (3)
1.Conclusion In summary, it can be concluded that under the conditions of creep tests conducted according to the I variant, a crucial factor determining the increase of stability of superalloys with a bigger macrograin (Fig.3, 4) was lev...Views -
The Influence of Macrostructure of Nickelbased Superalloys Inconel™713C and MAR 247 on the Characteristics of High-temperature Creep (2)
Analysis of the map of deformation mechanisms indicates that plastic deformation in the process of superalloy creep may occur as a result of diffusion or dislocation creep depending on the test conditions (temperature and stress). In the...Views -
The Influence of Macrostructure of Nickelbased Superalloys Inconel™713C and MAR 247 on the Characteristics of High-temperature Creep (1)
1.IntroductionOne of the main problems in the technology of casting heat resistant nickel alloys is the ability to shape their structure, providing the desired casting properties. Combination of creep strength, endurance under thermo - m...Views -
High Temperature Behaviors of a Casting Nickel-Based Superalloy Used for 815 ◦C
Abstract: The hot deformation behaviors of the SJTU-1 alloy, the high-throughput scanned casting Nickel-based superalloy, was investigated by compression test in the temperature range of 900 to 1200 ◦C and strain rate range of 0.1–0.00...Views