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Asymmetric Cyclic Behaviour of Fine- and Coarse-Grained Commercially Pure Copper and Aluminium

  • Jayanta Kumar MahatoEmail author
  • Partha Sarathi De
  • Amrita Kundu
  • Pravash Chandra Chakraborti
Conference paper
Part of the Lecture Notes in Mechanical Engineering book series (LNME)

Abstract

In the present study, uniaxial ratcheting behaviour of annealed copper and aluminium with two different grain sizes has been investigated. Engineering stress-control tests have been performed at various combinations of stress amplitudes and mean stresses. To account for grain size variation, stress amplitudes were selected keeping the constant ratio of equivalent stress amplitude and tensile strength. It is found that ratcheting life of fine- and coarse-grained copper and aluminium is inversely related to both stress amplitude and mean stress. However, the effect of stress amplitude on ratcheting life is more as compared to mean stress for both the FCC metals. It is also find out that the ratcheting life of fine-grained FCC metals is more compared to coarse-grained FCC metals. The ratcheting strain rate follows three stages irrespective of stress combination and grain size of both FCC metals. It is observed that for both the FCC metals, the average steady state ratcheting strain rate follows perfect power relationship with cycles to failure.

Keywords

Grain size Ratcheting phenomena Ratcheting lives Ratcheting strain rate Stress parameter 

Notes

Acknowledgements

The authors would like to thank CoE, TEQIP Phase-II and Jadavpur University for providing funding and facilities, respectively, for carrying out the research work.

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Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  • Jayanta Kumar Mahato
    • 1
    • 2
    Email author
  • Partha Sarathi De
    • 1
  • Amrita Kundu
    • 1
    • 2
  • Pravash Chandra Chakraborti
    • 1
    • 2
  1. 1.Metallurgical and Material Engineering DepartmentJadavpur UniversityKolkataIndia
  2. 2.Centre of Excellence in Phase Transformation and Product CharacterisationJadavpur UniversityKolkataIndia

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