报告摘要/Abstract：

Joining is an important process that often uses heat to melt metal to assemble two or more individual pieces. Unfortunately, such a processing technology could lead to the degradation of microstructures and mechanical properties, and the generation of residual stresses in the resulting components. Modern technological progress, for example electrical power generation, aerospace turbine blades and fasteners, demands the use of engineering materials in safety-critical components that operate at increasingly higher temperatures under dynamic loading. As a result, from the materials science perspective, it is crucial to understand the processing-microstructure-property interrelationship in order to develop a mechanistic-based lifetime prediction model. This presentation aims to showcase several interesting industrial problems and our research efforts as young academic to explore the materials science behind.  In particular, three themes will be covered:

·         Long-term creep performance of stainless steel

·         Microscopic considerations of the base metal constraint on a brazed joint

·         Electron beam melted non-weldable nickel-base superalloys and titanium aluminide with high cracking sensitivity

·         Fatigue-induced grain growth in ultra-fine grained titanium

I wish that this talk can facilitate us to identify some collaboration topics and define the way to start our joint research initiatives.  In addition, I am recruiting young researchers (both fully-funded PhD students and post-doctoral research associates) to join my group at Leicester.

If the following research keywords align with your area-of-expertise, I believe that this talk is relevant to you.

Keywords: High-temperature, Creep and Fatigue, Welding and Brazing, Residual Stress, Nickel-base Superalloy, Stainless Steel, Titanium and TiAl, Materials Science and Engineering, Microstructural Characterisation, Neutron Diffraction, Synchrotron X-ray Diffraction and Tomography, Electron Beam Melting, Ultra-fine grained structure

报告人简介/Brief Introduction of Speaker：

    Bo obtained a BEng degree from Beihang University between 2003 and 2007, specialising in Materials Engineering.  He then carried out his PhD in Department of Engineering at University of Bristol, between 2007 and 2011, followed by taking two Post-doctoral Research Associate posts in 2011 in Bristol’s High Temperature Centre and then in 2013 in Materials Performance Centre at University of Manchester.  In 2015, Bo moved to a Lectureship at Coventry University, being promoted to Senior Lecturer in 2017.  He was awarded a 5-year EPSRC Early-career Fellowship in Nuclear Fission in 2018 (UK’s Engineering Physical Sciences and Engineering Research Council, ￡1.3M).  Bo became a Professor of Engineering Materials at University of Leicester in March 2019 (at the age of 34) and at the same time he took the Associate Director role for the NISCO UK Research Centre. He has delivered research outcomes by publishing regularly in pre-eminent conference and peer-reviewed journals (41) that include top journals in the field: Acta Materialia (IF: 7.3, 3 papers) and International Materials Reviews (IF: 21.1).

Areas of research interests:

·         Creep, fatigue as well as oxidation

·         Residual stresses at different length-scales

·         High-temperature structural integrity assessment

·         Electron beam melting and other powder-bed-fusion additive manufacturing processes (experiment and process model)

·         Physical metallurgy of high-temperature structural materials

·         Titanium alloys and gamma-TiAl alloys

·         Nickel base superalloys

·         Austenitic stainless steels

·         Large scale experimental facilities (neutron and synchrotron X-ray based)

·         Microstructural characterisation using advanced electron microscopy