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Home > Prediction of Residual Stresses during Stress-Relief Annealing on Martensitic Stainless Steel AISI 420
 
Prediction of Residual Stresses during Stress-Relief Annealing on Martensitic Stainless Steel AISI 420
Paper Type
Contributed Paper
Title
Prediction of Residual Stresses during Stress-Relief Annealing on Martensitic Stainless Steel AISI 420
Author
Laksamee Angkurarach and Patiphan Juijerm*
Email
juijerm@gmail.com, fengppj@ku.ac.th
Abstract:

Residual stresses at the surface and in near-surface regions were intentionally generated by near-surface plastic deformation called deep rolling process. X-ray diffraction (XRD) technique was used to measure the residual stresses. Specimens with generated residual stresses at the surface were stress relieved by mean of heating at a temperature range of 300–600 °C with different soaking times of 0.1–10,000 min. It was found that generated residual stress of about -650 MPa was detected at the surface after the deep rolling process. Residual stresses decreased with increasing temperature and soaking time. A decrease of residual stresses during the stress-relief annealing was analyzed using the Zener-Wert-Avrami function. The activation enthalpy of residual stress relief was 2.64 eV, which was closed to the activation enthalpy of the iron self-diffusion. The results clearly indicated that the predominant relief mechanism was most likely the volume diffusion-controlled climbing of edge dislocations. Finally, simulation diagram of residual stress relief was shown with an overall error about 15%.

 

Keywords: Residual stress; Stress relief; Heat treatment; Stainless steel

Start & End Page
312 - 318
Received Date
2019-09-20
Accepted Date
2020-01-21
Full Text
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Correspondence:
Author Name
Patiphan Juijerm* - Department of Materials Engineering, Faculty of Engineering, Kasetsart University, 50 Ngamwongwan Rd., Ladyao, Jatujak, Bangkok 10900, Thailand.
Keyword:
Keyword
residual stress, stress relief, heat treatment, stainless steel,
Volume
Vol.47 No.2 (Special Issue I : March 2020)
 




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