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Effect of Temperature and Strain Amplitude on Low Cycle Fatigue Behaviour of DD11

  • Yuanyuan GuoEmail author
  • Yunsong Zhao
  • Jian Zhang
  • Yanfei Liu
  • Zhenyu Yang
  • Jiang Hua
  • Yushi Luo
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 217)

Abstract

The fatigue behaviours, including the fatigue cycle life, cyclic stress response, microstructure evolution and the fatigue fracture morphology of DD11 alloy with [0 0 1] orientation under the isothermal low cycle fatigue condition at 760 and 980 °C were investigated. The fatigue life decreased significantly with increasing total strain amplitude, but did not decrease with increasing temperature. The cyclic softening was related to the climb and cross-slip of dislocations. The dislocations which cut through the γ′ phase caused cyclic hardening. The fracture mode included shear fracture and normal fracture. This work is beneficial to build the relationship between microstructure and cyclic stress response behaviour.

Keywords

Low cycle behaviour Cyclic softening and hardening behaviour Fatigue life Dislocation 

Notes

Acknowledgements

This study was financially supported by Beijing Natural Science Foundation (2184132).

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Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • Yuanyuan Guo
    • 1
    Email author
  • Yunsong Zhao
    • 1
  • Jian Zhang
    • 1
  • Yanfei Liu
    • 2
  • Zhenyu Yang
    • 1
  • Jiang Hua
    • 1
  • Yushi Luo
    • 1
  1. 1.Science and Technology on Advanced High Temperature Structural Materials LaboratoryBeijing Institute of Aeronautical MaterialsBeijingChina
  2. 2.Sichuan Gas Turbine Research EstablishmentSichuanChina

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