Examining the Effect of Pileup on the Accuracy of Sharp Indentation Testing

Figure 13

Appearance of the indentation geometry by AFM at the center (a) and edge (b) of the HPTed niobium disk. It can be observed that, at the center of the disk, significant pileup effect is present (a2), while, at the edge, neither sink-in nor pileup effect is observed (b2) [15].

(a)  

(b)