Journal
JOURNAL OF MANUFACTURING PROCESSES
Volume 32, Issue -, Pages 763-772Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jmapro.2018.04.004
Keywords
Finite element modelling; Arrhenius equation-based model; Post weld heat treatment; Residual stress; Ti-6Al-4V
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Funding
- National Research Foundation (NRF) Singapore under the NRF-RR-NTU [M-RT3.2]
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Creep models are generally utilized for predicting the residual stress relief during post weld heat treatment (PWHT). However, a comprehensive model considering the temperature effect is still lacking. In the present work, a new temperature dependent Arrhenius equation-based model has been developed to predict the residual stress relief of PWHT of Ti-6Al-4V. The model was validated by the surface residual stress measurement of the Ti-6Al-4V plate before and after PWHT using X-ray Diffraction (XRD). The comparative study of modelling results and measurements indicates that the temperature dependent Arrhenius equation-based model developed in this work is accurate and effective for predicting the residual stress relief of PWHT of Ti-6Al-4V. Besides, the creep induced strain increment takes the dominant role in residual stress relief during the PWHT process of Ti-6Al-4V.
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