Affiliation: | (1) Structural Materials and Integrity Research Centre, Materials & Engineering Research Institute, Sheffield Hallam University, City Campus, Howard Street, Sheffield, S1 1WB, UK;(2) Laboratory of Technology and Strength of Materials, Department of Mechanical Engineering & Aeronautics, University of Patras, Patras, 26 500, Greece;(3) Applied Ultrasonics, 5871 Old Leeds Rd, Irondale, AL 35210, USA;(4) Northern Scientific Technological Company, 6 Voronin str. , Severodvinsk, Arkhangelsk Region, 164500, Russian Federation |