ep1666618b2 - ni based superalloy and its use as gas

Superalloys for High Temperatures—a Primer

Superalloys for High Temperatures—a Primer / 3 Fig. 1.1 Stress-rupture strengths of superalloys phases. Incipient melting is the melting that occurs in some part of the alloy that, when solidiﬁed, is not at equilibrium composition and thus melts at a lower

Research and Development of Inconel 718 Type

Inconel 718(Ni-19Cr-18Fe-3Mo-5Nb-1Ti-0.5Al) nickel-base superalloy strengthened mainly by Ni3Nb type γ″ and partially by Ni3Al type γ′ precipitation is today's most widely used superalloy in the world. China has paid special attention on Inconel 718 research and

Inconel Nickel

Nickel-Based Superalloy and Inconel Composition Below we breakdown the four major nickel-based superalloys, with the percentage of nickel and chromium denoted in parentheses (% by mass), along with their key features: 600 (72% Ni/15-17% Cr) offers resistance to hydrochloric gases and is seen as a useful alternative to 200 and 201-grade nickel when used in the service of sulfur compounds or

Nickel aluminide

Nickel aluminide typically refers to the one of the two most widely used compounds, Ni 3 Al or NiAl, however is generally any aluminide from the Ni-Al system. These alloys are widely used due to their corrosion resistance, low-density and easy production. Ni 3 Al is of specific interest as the strengthening γ' phase precipitate in nickel-based superalloys allowing for high temperature

Superalloy

While not used commercially to the extent of Ni-based superalloys, alloying elements found in research Co-based alloys are C, Cr, W, Ni, Ti, Al, Ir, and Ta. [9] [25] Chromium is also used in Cobalt based superalloys (occasionally up to 20 wt.%) as it provides oxidation and corrosion resistance, critical for material use in gas turbines.

Rosswag qualifies Ni

Due to its good strength properties at temperatures up to approx 980C, it is typically used in high-temperature applications, particularly in gas turbines. The company stated that its in-house process chain enables it to qualify materials for L-PBF within a few weeks, using its small-scale atomisation plant and comprehensively equipped metallurgy laboratory.

Nickel

Based on damage caused by microstructure evolution during long-term thermal exposure to analyze and predict creep behavior of Ni-based single crystal superalloy AIP Advances, Vol. 10, No. 8 Microstructure Evolution during Isothermal Aging for Wrought Nickel-Based Superalloy Udimet 520

Repair and manufacturing of single crystal Ni

2014/12/9An important evolution observed in Ni-based superalloys in recent years is the use of single crystal materials. These materials allow improving the fuel-use efficiency of gas turbine engines and increasing the service life of hot-section components, such

Investigation on the microstructure and tensile behavior of

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 However, to ensure its long-term service at critical conditions of temperature and stress, a wide range of alloying elements, such as Cr, Mo, and Al, are usually

Research Article Microstructural Changes during High Temperature Service of a Cobalt

based or Ni-Fe based superalloys are not mentioned because their use in gas turbine critical componentsis not common. Ni-Based Alloys . enickel-basealloysarethemorecomplex and the most widely used for the hottest components of gas turbines (e.g., gas

103 Hot die forging process optimization of superalloy IN718 turbine disc using

Keywords: superalloy IN718, turbine disc, processing map, finite element method, micro-structure simulation 1 INTRODUCTION Nickel (Ni)-based superalloy IN718 is an important material used for aero-engine turbine discs. To ensure the required mechanical

Wetting and interfacial behavior of Ni–Si alloy on

Wetting of molten Ni–56 at.% Si alloy on different substrates (SiC ceramic, Ni- and Co-based superalloys, Kovar, and Mo) are performed under different experimental conditions by the sessile drop technique. Temperature, atmosphere, and substrate composition play the key roles in determining the wettability, the spreading characteristics, and the interfacial morphology of the final interfaces

Nickel base superalloys having low chromium and cobalt

This invention relates to superalloys suited for use at elevated temperatures, and in particular, to nickel base superalloys used at elevated temperatures in gas turbine engines. The superalloys of the present invention are characterized by unusually low chromium and cobalt contents compared to many currently used nickel based superalloys.

How are Advanced Alloys Used in Aircraft?

Low-pressure blades and high-pressure compressor blades once made of a nickel-based superalloy are now constructed from titanium aluminide. Ti 5553 - an alloy of titanium, aluminum, vanadium, molybdenum, and chromium – is reasonably new to the industry and boasts high strength, good corrosion resistance and is lightweight.

Gas Turbine Technology Evolution: A Designers

2012/5/23Thickness Influence on the Creep Response of DD6 Ni-Based Single-Crystal Superalloy High Temperature Materials and Processes, Vol. 35, No. 9 Prediction of soot and thermal radiation in a model gas turbine combustor burning kerosene fuel spray at different swirl levels

Microstructure and hot corrosion behavior of hot dip

2020/5/29The Ni-based superalloy IN738LC was coated through a novel hot-dip siliconizing process, in which the samples were immersed in a mixture of molten Si powder and KCl/NaCl/NaF/ Na 2 SiF 6 salts. The molten salt applies a coating which contains high amounts of Si on the surface of IN738LC.

[PDF] DEVELOPMENT OF A NEW SINGLE CRYSTAL

In order to raise the turbine inlet gas temperature to improve thermal efficiency of gas turbines, turbine blade and vane materials are required to have high creep rupture strengths. In the present study, a new single crystal superalloy with a moderate Re addition (2.4wt%) has been developed. The alloy shows a higher creep rupture strength than the second and even the third generation single

[PDF] DEVELOPMENT OF A NEW SINGLE CRYSTAL

Materials used in gas turbine

Alloy 718, the most frequently used superalloy for aircraft gas turbines. 8. TURBINE BLADES AND VANES Challenges:- High Temp., creep and oxidation resistant. Wrought alloys with increase level of aluminium based alloy. Problem Forgeability. Cast nickel-base alloys: 1) Good high temp strength 2)Coarse grain size of casting.

Ni based superalloy and its use as gas turbine disks, shafts,

Ni based superalloy and its use as gas turbine disks, shafts, and impellers European Patent Application EP1195446 Kind Code: A1 Abstract: An alloy which is particularly useful in aircraft gas turbine disks (22), shafts (24), and impellers (22) has a

Microsegregation and precipitates of an as

The demand for increased efficiency of industrial gas turbines and aero engines drives the search for the next generation of materials. Promising candidates for such new materials are Co-based superalloys. We characterize the microsegregation and solidification of a multi-component Co-based superalloy and compare it to a ternary Co–Al–W compound and to two exemplary Ni-based superalloys by

Shape

The two most prevalent shape-memory alloys are copper-aluminium-nickel and nickel-titanium (), but SMAs can also be created by alloying zinc, copper, gold and iron.Although iron-based and copper-based SMAs, such as Fe-Mn-Si, Cu-Zn-Al and Cu-Al-Ni, are commercially available and cheaper than NiTi, NiTi-based SMAs are preferable for most applications due to their stability and practicability.