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Creep mechanisms and cavitation of AA5052 at intermediate stress and temperature region

Abedi, F ; Sharif University of Technology | 2024

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  1. Type of Document: Article
  2. DOI: 10.1177/02670836241235827
  3. Publisher: 2024
  4. Abstract:
  5. Creep mechanism and cavitation of AA5052 were studied employing creep experiments at 200–350°C and stresses 15–70 MPa. The microstructural observations were then performed to assess grain growth and formation of cavities. The apparent activation energy was defined in a range of 154–166 kJ/mole. It was found that at higher normalised stress region ((Formula presented.)), the stress exponent was about 7 and at lower stresses it decreased to about 5. Microstructural instability, that is, grain growth, was detected during creep at a temperature of 300°C or higher. This phenomenon affected the strain rate and the governing mechanisms. Microstructure of the sample tested at 300°C revealed that the coalescence of cavities could occur at creep strains higher than 6.5%. © The Author(s) 2024
  6. Keywords:
  7. Activation energy ; Cavitation ; Creep ; Magnesium alloys ; Strain rate ; Aluminum - magnesium alloys ; Apparent activation energy ; Creep cavitation ; Creep experiments ; Creep mechanism ; Intermediate stress ; Intermediate temperatures ; Micro-structural observations ; Stress exponents ; Temperature regions ; Grain growth
  8. Source: Materials Science and Technology (United Kingdom) ; Volume 40, Issue 13 , 2024 , Pages 998-1014 ; 02670836 (ISSN)
  9. URL: https://journals.sagepub.com/doi/10.1177/02670836241235827