Dr. Fuad Khoshnaw

PhD, CEng., FHEA

Senior Lecturer at De Montfort University, Leicester

Former Dean/Professor

Country United Kingdom

Short biography and link to the website or Research Gate.

I joined De Montfort University since 2018 as a Senior Lecturer in the School of Engineering and Sustainable Development. My research focuses on structural integrity and failure analysis, considering stress analysis, materials selection and the operation conditions of mechanical components. From 2010 to 2016, I worked as a Professor of Materials and Manufacturing as well as the Dean of Faculty of Engineering at Koya University, Kurdistan, Iraq. Before that, from 1996 to 2004, he worked as Lecturer/Associate Professor at Salahaddin University, Hawler, Iraq. I have published more 50 papers in different international journals and conferences in the fields of corrosion, welding, biomaterials and fracture mechanics.

Presentation title:

Practical Features of Stainless-Steel Alloys in Welding and Biomaterial

Abstract:

The presentation focuses on the metallurgical changes that associate with welding and heat treatments of different types of duplex stainless-steel alloys (2304, 2205 and 2507) and the role of austenitic stainless-steel alloy (316L) as a coating layer on Ti alloy as as antibacterial biomaterials applications. The first part aims to find out the optimum heat treatments to recover the microstructural changes of stainless-steel alloys, The alloys were heated to different temperatures, 750, 850, 950 and 1,050°C, for three different times, 10 min, 1 and 4 h. Findings The microstructural investigations showed that 2205 and 2507 behaved similarly in recovering their microstructures, especially in terms of the ferrite:austenite ratio within specific heat treatments and changing the hardness values. The results indicated that the microstructure of both alloys started to change above 750°C, the largest changes were shown at 850 and 950°C as the lowest ferrite content (FC%) was recorded at 850°C for both alloys. The second part aims to investigate the behaviour of austenitic stainless-steel layer on Ti substrate using a powder metallurgical technique. The Ti6Al4V alloy powder was placed as a substrate and stainless-steel type 316L powder layer was added on the substrate. The two layers were consolidated in-situ using a uniaxial hot press. The samples were metallographically prepared and their antibacterial properties were evaluated. A strong bonding was observed between the Ti6Al4V substrate and the 316L stainless steel layer, and no bacteria were observed on the stainless-steel surface.

Selected recent 2 or 3 Journal publications.

1 F. Khoshnaw, R. Yamanoglu, U. Basci, O, Muratal “Pressure Based Bonding of Stainless Steel on Titanium Alloy Using Powder Metallurgy” Materials Chemistry and Physcis, Vol. 259, 2021.

https://www.sciencedirect.com/science/article/pii/S0254058420313754?via%3Dihub

2 F. Khoshnaw, V. Vitry, F. Delaunois “Recovery of the Microstructural Changes of Different Duplex Stainless-Steel Alloys” Multidiscipline Modeling in Materials and Structures, Vol. 6, 2020.

https://www.emerald.com/insight/content/doi/10.1108/MMMS-06-2020-0148/full/html

3 R. Yamanoglu, F. Khoshnaw, I. Daoud, E. Efendi “Effect of Silver Content on the Wear and Mechanical Properties of Powder Metallurgical Ti-5Al-2.5Fe-xAg Alloys” Journal of Mining and Metallurgy, Section B: Metallurgy, Vol. 56, No. 1, 2020, pp. 119-125.

http://www.jmmab.com/images/pdf/2020/1/1450-53391900056Y.pdf