X-ray Diffraction Investigation of Annealing Behavior of Peened Surface Deformation Layer on Precipitation Hardening Stainless Steel

  • Junjie Huang
  • Zhou Wang
  • Jin Gan
  • Ying Yang
  • Feng Huang
  • Gang Wu
  • Qingshuai Meng


In order to investigate the recrystallization behavior of peened surface deformation layer of precipitation hardening stainless steel, a classic x-ray diffraction line profile analysis, Voigt method, was carried out on peened 17-4PH with different isothermal annealing temperatures. The activation energy of domain boundary migration (Qa) and the activation energy of microstrain relaxation (Qb) were calculated by regression analysis in different annealing temperature conditions. The results show that the value of Qa decreases with annealing temperature increasing, which is due to the influence of precipitation (ε-Cu) size on the movements of grain and subgrain boundaries. The maximum growth rate of ε-Cu particles occurs during 400 to 500 °C interval. Compared with growth behavior of domain size, microstrain relaxation behavior is less sensitive to precipitation particle size. The effects of annealing temperature and time on dislocation density are both significant when annealing temperature is lower than 500 °C. However, the effect of annealing temperature on dislocation density becomes insignificant when annealing temperature is higher than 500 °C. 300 °C annealing temperature only leads to the microstrain relaxation but nearly cannot lead to the domain size growth even if prolonging annealing time. Microstructure enhancement effect still exists in plastic deformation layer when 300 °C annealing temperature lasts for 60 min but nearly disappears when 600 °C annealing temperature lasts for 20 min.


dislocation density precipitation hardening stainless steel recrystallization behavior shot peening Voigt method 



The financial support of the National Natural Science Foundation of China (NSFC) (No. 51405356), the Research Fund for the Doctoral Program of Higher Education of China (No. 20130143120015) and State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology (P2016-06), are gratefully acknowledged.


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Copyright information

© ASM International 2018

Authors and Affiliations

  • Junjie Huang
    • 1
  • Zhou Wang
    • 2
    • 4
  • Jin Gan
    • 3
  • Ying Yang
    • 2
    • 4
  • Feng Huang
    • 2
    • 4
  • Gang Wu
    • 2
    • 4
  • Qingshuai Meng
    • 2
    • 4
  1. 1.Nanjing CenterChina Geological SurveyNanjingPeople’s Republic of China
  2. 2.School of Automotive EngineeringWuhan University of TechnologyWuhanPeople’s Republic of China
  3. 3.School of TransportationWuhan University of TechnologyWuhanPeople’s Republic of China
  4. 4.Hubei Key Laboratory of Advanced Technology of Automotive ComponentsWuhan University of TechnologyWuhanPeople’s Republic of China

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