Tungsten self-ion irradiation was performed at 800 °C up to 0.01-1 dpa on two different W grades with essentially different dislocation density. Nanoindentation was applied to characterize the radiation hardening in two W grades with different microstructure. Different methods to analyze the indentation curves were applied to extract the bulk equivalent radiation hardening. It was shown that depending on the applied method, different outcomes may occur. The most satisfactory procedure was established and a consistent set of parameters was found. The bulk equivalent radiation hardening was found to saturate above 0.1 dpa. The characteristic distance between irradiation induced defects acting as dislocation pinning points was found to decrease up to 0.1 dpa, and then saturate/increase with irradiation dose. No essential difference in radiation hardening was observed between the studied W grades with essentially different initial dislocation density.

钨自离子辐照是在800°C至0.01-1 dpa的两种不同W级下进行的，这些W级的位错密度基本不同。纳米压痕用于表征具有不同微观结构的两个W级的辐射硬化。应用了不同的方法来分析压痕曲线，以提取整体等效辐射硬化。结果表明，根据所采用的方法，可能会出现不同的结果。建立了最令人满意的程序，并找到了一致的参数集。发现总当量辐射硬化在0.1dpa以上饱和。发现作为位错钉扎点的辐照引起的缺陷之间的特征距离减小到0.1 dpa，然后随着辐照剂量的增加而饱和/增大。