TY JOUR TI Use of Radiography Techniques to Analyze the Quality of Beryllium Parts Welding KW beryllium KW radiography KW weld defects KW finite element method KW net force KW welding tooling KW geometry evaluation JO NDT World AU Eliseev, D.P. AU Leonova, T.G. AU Fedorovich, S.N. AU Filippov, A.Y. AU Scherbak, A.G. PY 2020 IS 23 PB LLC SVEN