Dr. Jamie Pennington

Graduate Trainee at Inductelect Ltd

After studying Physical Sciences with the Open University I joined Sheffield University in 2012 to undertake my MSc (Eng) in Environmental and Energy Engineering in the Chemical and Biological Engineering department.

My MSc (Eng) research project focused on the development of composite carbon electrodes in electrochemical supercapacitors for energy storage applications. During the course of this research I became extremely interested in the materials science underpinning the production of large micro-scale surface areas on activated carbon particles to increase energy and power density.

After graduating in 2013 and receiving the departmental prize for best Masters research project I joined the Advanced Metallic Systems Centre for Doctoral Training (CDT) in the Materials Science and Engineering Department to broaden my understanding and appreciation of the fundamental and enabling role materials science plays in engineering applications and technological development.

Current Research

My PhD research, under the supervision of Professor Bradley Wynne and in conjunction with industrial partners NeoNickel Ltd. and Rolled Alloys Inc., concerns the thermo-mechanical processing of super duplex stainless steel with the aim of better understanding microstructure development during forging and final quality heat treatment of components for extreme environment applications in for example, offshore oil and gas sub sea pipework systems, water desalination and phosphoric acid production plant.

In this way it is hoped that improved service life and more efficient manufacturing can be achieved as well as extending the performance envelope of this particular class of engineering material.This is a multi-scale, multi-faceted project and during the course of my research I have employed finite element analysis to simulate the temperature, stress and strain distributions in components during forging and heat treatment. Additionally, I have also investigated experimental replication of the temperature and strain rate in industrial forging on the University’s Servotest Ltd.

Thermo-Mechanical Compression machine. This has formed the basis of the development of a constitutive flow model to describe the plasticity of super duplex alloys over a range of thermo-mechanical processing conditions.

I also employ the electron back scattered detection technique through the facilities in the University’s Sorby Centre for Electron Microscopy to analyse crystallographic textural developments as a result of thermo-mechanical processing.

My work also concerns establishing relationships between this crystallographic data and macro-scale mechanical properties such as impact toughness and hardness as determined though Charpy testing and nano indentation/Vickers hardness testing, respectively.