Application of small-scale testing for investigation of ion-beam-irradiated materials

Abstract

Abstract

Compressive Properties of ⟨110⟩ Cu Micro-Pillars after High-Dose Self-Ion Irradiation

“…In terms of a radiation effect, the only observation that can be drawn is that the flow stress at 2% strain for the irradiated Cu exceeds ∼122 MPa. This end of range effect reiterates the message of Hosemann et al [35] and Kiener et al [36] that it is important to configure experiments to probe a well-known radiation affected zone.…”

“…To avoid the damage gradient effect, some have suggested fabricating specimens normal to the irradiation direction. [36] A challenge with such an approach is that the region of relatively uniform damage is limited and may require a reduction in pillar size which could introduce a size effect.…”

Characterization of ion irradiation effects on the microstructure, hardness, deformation and crack initiation behavior of austenitic stainless steel:Heavy ions vs protons

“…The small penetration depths associated to the ion irradiations bound to use the small scale material evaluation methods to assess the irradiation induced changes in mechanical properties [35]. Nanoindentation is one of such technique and is generally employed to estimate the irradiation hardening in the ion irradiated material (see e.g.…”

“…6c, each indent made on samples has an associated plastic zone. The hardness value obtained for a given indent at a depth "d" contains the contribution from the entire plastic zone originating from the indent [35,42,43]. In ion irradiated samples, beyond a certain depth, plastic zone originating from the indentation exceeds the boundary between the irradiated and underlying unirradiated material (case A and B in Fig.…”

“…Considering that plastic zone extends up to about 4e5 times the indent depth in ion irradiated samples [23,35,45], indents made at depths ! 0.6 mm are assumed to have a plastic zone extending up to depths > 2.5 mm (i.e.…”