Zhang Zhao
Professor Supervisor of Doctorate Candidates Supervisor of Master's Candidates
Academic Titles:Professor in Process Mechanics
Gender:Male
Alma Mater:Dalian University of Technology
Degree:Doctoral Degree
School/Department:Department of Engineering Mechanics, Dalian University of Technology
Discipline:mechanics of manufacturing process. Engineering Mechanics. Computational Mechanics
Business Address:Room 619,Integrated Laboratory building (1#)
Contact Information:
E-Mail:
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Date:2019-03-12
Indexed by:Journal Article
Date of Publication:2017-06-01
Journal:INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
Included Journals:EI、SCIE
Volume:153
Page Number:1-14
ISSN:0308-0161
Key Words:Tungsten inert gas welding; Post weld heat treatment; Residual stress
Abstract:The temperature filed was simulated by use of the established moving heat source model of TIG welded impeller. The obtained computational temperature can be treated as thermal load for the computation of the residual stress near weld. The comparison with experimental data in published literature can validate the proposed models. The effect of the post weld heat treatment (PWHT) was studied by the Norton creep law model. Results indicate that the circumferential residual stress in blade is obviously higher than the vertical residual stress. The final residual stress in the impeller can be greatly decreased by the PWHT. The PWHT temperature is the most important factor in the PWHT process. Higher PWHT temperature can be beneficial to the decrease of the residual stress. But when the PWHT temperature is higher enough, stress concentration occurs at the corner of blade. PWHT process can obviously decrease the residual stress intensity factor. (C) 2017 Elsevier Ltd. All rights reserved.
Zhang Zhao, Ph.D., Professor in Process Mechanics.
Editorial member in Coatings (IF:2.881) from 2020 to 2022.
Editorial member in Crystals (IF:2.589) from 2020 to 2022.
Younth editorial member in Journal of Central South University(IF:1.716) from 2020 to 2022.
Professor Zhang has published more than 60 SCI publications with over 1100 citations. He served as reviewers for more than 30 international journals. His main pulications can be found:
https://orcid.org/0000-0001-7181-8617
https://publons.com/researcher/1987190/zhao-zhang/
The scientific research focuses on experimental and numerical works on friction stir welding/processing/additive manufacturing, numerical modelling and simulation of additive manufacuring, topological design of phononic crystals, locomotive and high speed train design.
