What is the Advantage and Disadvantage of NiCr Alloy

29 Apr.,2024

 

Nickel-chromium electrothermal alloy series main ...

Nickel-chromium electrothermal alloy series main advantages and disadvantages

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Advantages: high temperature strength is higher than iron chrome aluminum, it is not easy to be deformed under high temperature, its structure is not easy to change, plasticity is good, easy to repair, its emissivity is high, non-magnetic, strong corrosion resistance, long service life, etc.

Disadvantages: Due to the use of the scarce nickel metal material, the price of this series of products is up to several times higher than that of iron-chromium-aluminum, and the use temperature is lower than that of iron-chromium-aluminum.

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Nickel in Engineering: Benefits, Drawbacks, and Testing

Poisson's ratio and shear modulus are two important parameters that describe the elastic behavior of nickel and its alloys under stress. Poisson's ratio is the ratio of the lateral strain to the axial strain when a material is stretched or compressed. Shear modulus is the ratio of the shear stress to the shear strain when a material is twisted or distorted. These parameters can affect the stiffness, deformation, vibration, and stability of nickel and its alloys in engineering applications.

The Poisson's ratio of pure nickel is about 0.31, which means that it contracts slightly in the lateral direction when it is stretched in the axial direction, and vice versa. The Poisson's ratio of nickel alloys can vary depending on their composition and structure, but it is usually between 0.25 and 0.35. The shear modulus of pure nickel is about 76 GPa, which means that it resists shear deformation moderately when it is twisted or distorted. The shear modulus of nickel alloys can also vary depending on their composition and structure, but it is usually between 50 and 100 GPa.

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