Enhancing surfaces for performance and durability

Surface engineering is a cost-effective way to improve the performance of materials. I am working in the field of materials research focusing on two different topics, namely residual stresses and high temperature coatings.

Residual stresses in engineering materials

The properties of engineering materials such as resistance to fatigue or stress corrosion cracking can be affected by residual stresses originating from different manufacturing processes. I have long research experience in the field, working with different research projects varying from studying residual stresses from various manufacturing processes to analyzing the mechanical/fatigue behavior with regard to residual stresses and microstructure. My specialties are X-ray and neutron diffraction techniques and scanning electron microscopy. My main research interests in the field are given below:
  • Residual stress generation and characterization
  • Fatigue with regard to manufacturing effect
  • In-situ diffraction study of material behavior 
  • Stress corrosion cracking

High Temperature Coatings

High temperature coatings are designed and used to protect metallic components operating in the hot sections of advanced engines. The resistance of such coatings against service induced coating degradation is critical for the performance and durability of the components. My research in the field focuses on optimizing the coatings resistance against degradation, which includes development, characterisation and modelling of metallic coatings for oxidation and corrosion protection and thermal barrier coatings which also provide heat isolation. 

Surface engineering research at LiU

Publications

2018

Dunyong Deng, Ru Peng, Håkan Brodin, Johan Moverare

Microstructure and mechanical properties of Inconel 718 produced by selective laser melting: Sample orientation dependence and effects of post heat treatments

In Materials Science & Engineering

Article in journal

2017

Zhe Chen, Ru Lin Peng, Jinming Zhou, Volodymyr Bushlya, Rachid M Saoubi, Sten Johansson, Johan Moverare

Effect of Cutting Conditions on Machinability of AD 730 TM during High Speed Turning with PCBN Tools

Conference paper

Dunyong Deng, Johan Moverare, Ru Lin Peng, Hans Söderberg

Microstructure and Anisotropic Mechanical Properties of EBM Manufactued Inconel 718 and Effects of Post Heat Treatment

In Materials Science & Engineering

Article in journal