Makhlai, V. A.Herashchenko, S. S.Aksenov, N. N.Byrka, O. V.Garkusha, I. E.Malykhin, S. V.Surovitskiy, S. V.Kulik, N. V.Staltsov, V. V.Lebedev, S. I.Shevchuk, P. B.Wirtz, M.Sadowski, M. J.2021-08-112021-08-112018Erosion properties of tungsten and WTa5 alloy exposed to repetitive QSPA plasma loads below melting threshold / V. A. Makhlai [et al.] // Problems of atomic science and technology. Ser. : Plasma physics. – 2018. – No. 6 (118). – P. 59-62.https://repository.kpi.kharkov.ua/handle/KhPI-Press/53860The damage of deformed double forged pure tungsten (W) and tungsten alloyed with 5 wt.% tantalum (WTa5) have been studied in experimental simulations of ITER-like transient events (surface heat load of 0.45 MJ/m² and the pulse duration of 0.25 ms) with quasi-stationary plasma accelerator QSPA Kh-50. The plasma exposures were performed for targets maintained at room temperature and preheated at 200 or 300°C. The large and fine cracks appeared in result of plasma impacts. The high number of repetitive plasma loads below the melting threshold led to the clear degradation of thermo-mechanical properties of the affected surface layers on tungsten. Comparative analysis of the cracks propagation to the bulk is presented for both W and WTa5 samples.entungstenheat loadthermo-mechanical propertiesplasma loadsArticle