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Open AccessArticle

Analytical Model to Compare and Select Creep Constitutive Equation for Stress Relief Investigation during Heat Treatment in Ferritic Welded Structure

1
Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
2
State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China
3
Collaborative Innovation Center of Advanced Nuclear Energy Technology, Beijing 100084, China
*
Author to whom correspondence should be addressed.
Metals 2020, 10(5), 688; https://doi.org/10.3390/met10050688
Received: 9 April 2020 / Revised: 17 May 2020 / Accepted: 21 May 2020 / Published: 23 May 2020
(This article belongs to the Special Issue Heat Treatment of Steels)
The one-dimensional analytical model was promoted to help select the creep constitutive equation and predict heat treatment temperature in a ferritic welded structure, along with neglecting the impact of structural constraint and deformation compatibility. The analytical solutions were compared with simulation results, which were validated with experimental measurements in a ferritic welded rotor. The as-welded and post weld heat treatment (PWHT) residual stresses on the inner and outer cylindrical surfaces were measured with the hole-drilling method (HDM) for validation. Based on the one-dimensional analytical model, different effects of Norton and Norton-Bailey creep constitutive equation on stress relief during heat treatment in a ferritic welded rotor were investigated. View Full-Text
Keywords: residual stress; creep; stress relief; welded rotor residual stress; creep; stress relief; welded rotor
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MDPI and ACS Style

Hu, M.; Li, K.; Li, S.; Cai, Z.; Pan, J. Analytical Model to Compare and Select Creep Constitutive Equation for Stress Relief Investigation during Heat Treatment in Ferritic Welded Structure. Metals 2020, 10, 688.

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