Zhang Zhao
Professor Supervisor of Doctorate Candidates Supervisor of Master's Candidates
Main positions: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:+86-411-84708432 zhangz@dlut.edu.cn
E-Mail:zhangz@dlut.edu.cn
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Indexed by:期刊论文
Date of Publication:2019-06-01
Journal:INTERNATIONAL JOURNAL OF THERMAL SCIENCES
Included Journals:SCIE、EI
Volume:140
Page Number:329-343
ISSN No.:1290-0729
Key Words:Additive manufacturing; Laser metal deposition; Multiscale model; Duplex alloy
Abstract:A new heat source model is proposed for the simulation of the temperature rises in the laser deposition melting additive manufacturing process. The obtained temperature histories in different layers can be used to predict the microstructural evolutions in a multiscale strategy including the grain cluster scale and single grain scale in Monte Carlo model. It is found that re-melting and re-heating due to different temperature histories of different layers are main factors to affect the microstructural evolutions in LAM. By use of the predicted microstructural and the self-consistent model, the flow stresses at different strain rates and temperatures are predicted. The predicted flow stress shows that the flow stress is higher in the middle of the as-built LAM product but lower near the top or the bottom surfaces. The increase of the scanning speed of laser can lead to the increase of the size of heat affected zone, which is the reason for the formation of larger grain sizes and more a generations in higher scanning speed. Higher a volume fraction is the main reason for higher mechanical property in higher scanning speed.
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.
