Neutron irradiation-enhanced grain growth in tungsten and tungsten alloys

•Neutron radiation-enhanced recrystallization in W and undoped W-Re alloys was observed at ~850 °C.•Solute Re alloying was ineffective at mitigating recrystallization under neutron irradiation.•Doping with K and La effectively suppressed recrystallization under neutron irradiation at ~850 °C.•Radiation-enhanced diffusion theory is used to explain recrystallization at low temperatures.