Tempering of quenched martensite steel is necessary to improve Ductility

Electron Beam welding techniques require a vacuum environment.

Electron Beam Welding is a welding process utilizing a heat generated by a beam of high energy electrons. The electrons strike the work piece and their kinetic energy converts into thermal energy heating the metal so that the edges of work piece are fused and joined together forming a weld after Solidification. Electron Beam Welding is performed under vacuum conditions to prevent dissipation of the electron beam.