IN 100 VM

IN 100, developed by GE Aircraft Engines, is a nickel-based super heat-resistant alloy engineered to deliver exceptional mechanical strength and oxidation resistance at extreme temperatures. In particular, IN 100 VM—produced via vacuum melting (VM)—is highly valued in the aerospace industry for its high purity, excellent durability, and structural reliability.


Chemical Composition and Alloying Elements

IN 100 is primarily composed of nickel (Ni), with alloying elements including:

- Chromium (Cr) for oxidation resistance

- Cobalt (Co) for high-temperature strength

- Aluminum (Al) and Titanium (Ti) for gamma prime (γ') precipitation hardening

- Molybdenum (Mo) and Vanadium (V) for solid-solution strengthening

- Zirconium (Zr) and Boron (B) to enhance grain boundary strength and creep resistance

This combination provides superior high-temperature stability and exceptional mechanical performance.


High-Temperature Strength and Oxidation Resistance

IN 100 VM maintains high yield strength and creep fracture resistance at temperatures exceeding 980°C. The alloy exhibits excellent oxidation resistance, making it suitable for turbine blades, combustion chambers, and other components exposed to prolonged heat stress.

Its precipitation hardening mechanism, refined by post-casting heat treatment, improves fracture strength and fatigue life, making it ideal for aerospace and power generation applications.


Importance of Vacuum Melting (VM) Process

To achieve its performance characteristics, IN 100 must be produced using vacuum melting techniques such as vacuum induction melting (VIM) or vacuum arc remelting (VAR). This process:

- Minimizes impurities like oxygen, nitrogen, and hydrogen

- Ensures chemical homogeneity

- Improves fatigue resistance and tensile strength

- Reduces defect rates in critical components

Vacuum melting is essential for ensuring material reliability in high-temperature aviation systems.


Key Applications

Thanks to its outstanding properties, IN 100 VM is widely used in:

- Turbine blades, disks, and rings for aircraft engines

- Combustion chamber liners

- High-pressure turbine parts in gas turbines

- High-performance automotive turbines

- Heat exchangers and high-temperature pumps

- Select parts in aerospace jet engines and power plants


Recycling and Resource Circularity

IN 100 scrap has high recycling value due to its composition and production method. Since it is originally manufactured by vacuum melting, the recycled scrap must meet strict purity standards to prevent performance degradation during remelting.

Key steps in IN 100 recycling include:

- Chemical analysis of recovered scrap

- Sorting and refining of qualifying material

- Reuse in remelt feedstock for high-performance applications

With growing demand for sustainable resource circulation in the aviation industry, high-purity IN 100 recycling contributes to carbon reduction, cost efficiency, and supply chain security.



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