List of Metals or Alloys With Fatigue Limits?

In summary, fatigue limits refer to the pressure levels that metals or alloys can withstand without experiencing any permanent damage. While steel and titanium have fatigue limits, aluminum does not. Some people may question the existence of fatigue limits, but they are recognized in the field of physical metallurgy. Other types of metals or alloys may also have fatigue limits, and further information can be found in Physical Metallurgy 4E vol 3 under the references section.
  • #1
TheAzn
15
0
I know that steel and titanium have fatigue limits.

Just to clarify, metals or alloys with fatigue limits are metals that - as long as they experience pressures that lower than the limits - can last "indefinitely".

Aluminum, for example, does NOT have a fatigue limit. No matter how small the forces, they will add up over time and the aluminum will disintegrate.

I know that some people do not consider fatigue limits to be real, but just assume that it exists for now.

Are there any other types of metals or alloys that can be considered to have "fatigue limits"?
 
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  • #2
you can find the answer in Physical Metallurgy 4E vol 3, look under the references in that section of the book for more details.
 

1. What is the purpose of a list of metals or alloys with fatigue limits?

A list of metals or alloys with fatigue limits is used to provide information on the fatigue strength of various materials. This is important for engineers and designers in determining the durability and reliability of a material when subjected to repeated loading and unloading.

2. How is the fatigue limit of a metal or alloy determined?

The fatigue limit of a metal or alloy is determined through experimental testing, where the material is subjected to cyclic loading until it fails. The stress level at which the material can withstand an infinite number of cycles without failure is considered its fatigue limit.

3. What factors can affect the fatigue limit of a metal or alloy?

The fatigue limit of a metal or alloy can be affected by various factors, such as the composition and microstructure of the material, surface conditions, loading frequency, and temperature. Hardening treatments, such as heat treatment or cold working, can also greatly influence the fatigue limit.

4. How does the fatigue limit compare to other measures of a material's strength?

The fatigue limit is a measure of a material's resistance to failure under cyclic loading, whereas other measures of strength, such as ultimate tensile strength or yield strength, indicate the maximum stress a material can withstand before permanent deformation or fracture. The fatigue limit is typically much lower than these measures of strength.

5. Is the fatigue limit the same for all applications of a particular metal or alloy?

No, the fatigue limit can vary depending on the specific application and loading conditions. A material that has a high fatigue limit in one application may have a lower fatigue limit in a different application. Therefore, it is important to consider the specific conditions in which a material will be used when determining its fatigue limit.

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