Ion beam analysis of single crystal austenitic stainless steel

Radiation effect on lattice structure of single crystal austenitic stainless steel SUS310S under He+ ion bombardment was studied. The He+ ions with the energy of 1.7MeV were incident along <110>, <100> or <111> axis of the specimen. K X-rays of the constituent elements induced by the He+ ions as well as Rutherford back-scattered He ions were measured. From the analysis of the K X-ray spectra obtained, the lattice position of the alloying and impurity atoms and their disordering caused by the He irradiation were investigated. It was found that the impurity atom P locates at the octahedral site of the fcc crystal and it tends to displace from the site under the irradiations of the energetic He ion beams. (author)