A Comprehensive Review of Fatigue Strength in Pure Copper Metals (DHP, OF, ETP)

Due to their exceptional electrical and thermal conductivity properties, high-purity copper (Cu-DHP) and copper alloys of similar composition, such as electrolytic tough-pitch (ETP), oxygen-free electronic (OFE) and oxygen-free (OF), have often been used in the manufacture of essential components fo...

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Bibliographic Details
Published in:Metals (Basel ) 2024-04, Vol.14 (4), p.464
Main Authors: Jiménez-Ruiz, Eduardo, Lostado-Lorza, Rubén, Berlanga-Labari, Carlos
Format: Article
Language:English
Subjects:
Amplitudes
Copper
Copper base alloys
Cu-DHP
Cyclic loads
Electrical resistivity
Failure
Fatigue failure
Fatigue life
Fatigue strength
Grain size
Heat exchangers
Heat treating
High cycle fatigue
Load
Low cycle fatigue
Nuclear power plants
Oxygen
pure copper metals
S N diagrams
Software
Strain
Thermal conductivity
Titanium alloys
Ultimate tensile strength
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Summary:Due to their exceptional electrical and thermal conductivity properties, high-purity copper (Cu-DHP) and copper alloys of similar composition, such as electrolytic tough-pitch (ETP), oxygen-free electronic (OFE) and oxygen-free (OF), have often been used in the manufacture of essential components for the electrical, electronic and power generation industries. Since these components are subject to cyclic loads in service, they can suffer progressive structural damage that causes failure due to fatigue. The purpose of this review is to examine the most relevant aspects of mechanical fatigue in Cu-DHP, ETP, OFE and OF. The impact of many factors on fatigue strength (Se), including the frequency, temperature, chemical environment, grain size, metallurgical condition and load type, were analyzed and discussed. Stress–life (S-N) curves under zero mean stress (σm = 0) were found for high-cycle fatigue (HCF). For non-zero mean stress (σm ≠ 0), stress curves were based on a combination of Gerber, Soderberg and ASME elliptic failure criteria. Stress–life (S-N) curves were also developed to correlate fatigue strength (Se) with stress amplitude (σa), yield strength (Syp) and ultimate strength (Sut). Finally, for low-cycle fatigue (LCF), strain–life (ε-N) curves that establish a relationship between the number of cycles to failure (N) and total strain amplitude (εplastic) were determined. Hence, this review, as well as the proposed curves, provide valuable information to understand fatigue failure for these types of materials.
ISSN:2075-4701
2075-4701
DOI:10.3390/met14040464