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Jun Liu

Dr Jun Liu



School of Engineering

+44 29208 79056
Queen's Buildings, Room Room E/3.19, 5 The Parade, Newport Road, Cardiff, CF24 3AA
Available for postgraduate supervision


Dr. Jun Liu is a Lecturer and an academic member of Magnetics and Materials Research Groups at School of Engineering of Cardiff University. With a strong foundation in the intricacies of metallurgy and magnetic materials, Dr. Jun Liu has developed a comprehensive research portfolio that meticulously explores the correlation between microstructures and the magnetic properties of soft magnetic materials.

Research Interests:

Dr. Jun Liu's research is anchored in a profound interest in unveiling the intricate relationships between the microstructures and magnetic properties of magnetic materials. This encompasses a spectrum of specialized areas, including:

  • Non-Destructive Evaluation of Microstructures: Utilizing advanced electromagnetic and magnetic techniques to innovatively assess the microstructures of steels without causing any material damage or alteration.

  • Microstructural Magnetic Modelling: Engaging in cutting-edge modelling to analyze and predict the magnetic properties influenced by various microstructures.

  • Microstructure and Magnetic Property Characterisation: Conducting thorough characterizations to deeply understand the mutual influences between microstructures and magnetic properties.

  • Finite Element Modelling of Electromagnetic Sensor Systems: Applying sophisticated finite element modelling approaches to develop and optimize electromagnetic sensor systems, enhancing their performance and reliability.




















Book sections




Microstructural Magnetic Modelling

Microstructure profoundly influences the magnetic properties of magnetic alloys, akin to how it affects the mechanical attributes of structural alloys. Established theories and empirical laws successfully correlate microstructure with mechanical properties, supported by advanced commercial simulation tools that enable precise predictions. Despite these advancements, there remains a notable knowledge and modelling deficit concerning the relationship between microstructure and magnetic properties.

The prevailing comprehension of the connection between microstructure and magnetic attributes in magnetic alloys is primarily empirical. It often remains confined to singular correlations between individual microstructural parameters and magnetic properties, and is generally restricted to a narrow scope of applicability.

In light of these challenges, our objective is to pioneer the development of a sophisticated Microstructural Magnetic Modelling System. This innovative system will serve as a cornerstone for the microstructure engineering and analytics of magnetic materials. We aim to transcend existing boundaries, enriching the modelling landscape with tools capable of not only predicting magnetic properties from microstructures, but also enabling the inversion—forecasting microstructures based on magnetic properties. Through our groundbreaking research, we seek to unveil new dimensions in the understanding and manipulation of the magnetic properties in alloys.

An overview of my research in Microstructural Magnetic Modelling

Enhance microstructural modelling with realistic microstructure

I have developed and am mainting the repository for a MATLAB-based app, EBSDPolygonizer, designed to transform EBSD grain data into polygonal representations. In this conversion, each grain is represented by a distinct polygon. This transformation allows for the direct utilization of real microstructures as geometries in finite element (FE) models and automated assignment of material parameters and boundary conditions to individual grains.



I teach the following modules:

  • Foundation: EN0012 Electrical Circuits and Analysis
  • Year 1: EN1040 Electrical Technology
  • Year 2: EN2709 Power System Analysis
  • Year 3: EN3820 Introduction to Magnetic Materials


Dr. Jun Liu is a dedicated educator and researcher, currently serving as a Lecturer at Cardiff University since November 2020. With a rich background in materials science and engineering, Jun has cultivated extensive expertise in the nuanced domains of materials and magnetics.

Jun embarked on his academic journey at the Harbin Institute of Technology in China, earning a Bachelor of Engineering in Welding in 2001, followed by a Master of Engineering in Materials Processing Engineering in 2003. Driven by a passion for deepening their knowledge, he furthered their education at Loughborough University, where he was awarded a PhD in electrocrystallisation and electronic materials in 2010.

Before joining Cardiff University, Jun enriched his professional journey through significant research contributions in the area of non-destructive evaluation of steel microstructure. He held a position as a Research Fellow, contributing to various EPSRC and EU funded projects. His impactful work, carried out at the University of Birmingham and the University of Warwick, has been instrumental in advancing understanding and methodologies in the field.

Academic positions

  • 2020 - Present: Lecturer, School of Engineering, Cardiff University
  • 2014 - 2020: Postdoctoral Research Fellow, WMG, University of Warwick
  • 2010 - 2014: Postodctoral Research Fellow, School of Metallurgy and Materials, University of Birmingham

Committees and reviewing

  • Journal reviewer: 
    • Metallurgical and Materials Transaction A
    • Journal of Magentism and Magnetic Materials
    • Materials Science and Engineering A
    • NDT & E International
    • International Journal of Pressure Vessels and Piping
    • IEEE Sensors Journal
    • IEEE Transactions on Industrial Informatics
    • IEEE Access
    • Journal of Alloys and Compounds
    • Thin Solid Films
    • Physica Scripta
    • The International Journal of Advanced Manufacturing Technology
    • Sensors
    • Measurements
    • Smart Materials and Structures Metals
    • Crystals
    • Metals


I am interested in supervising research students in the area of magnetic materials and applications including but not limited to: 

  • Magnetic materials characterisation, processing and applications
  • Magnetic non-destructive evaluation and testing
  • Magnetic hysteresis modelling
  • Finite Element modelling of electromagnetic systems
  • Microstructure - physical property - mechanical property relationships

External supervision: 

Co-supervisor (15%) for Ondi Mukherjee (PhD at University of Warwick) -- Simulation of Texture Development during Steel Processing (2019--Present)

Current supervision

Yating Li

Yating Li

Research student