Details

Autor(en) / Beteiligte

• Fan, Yue
• Iwashita, Takuya
• Egami, Takeshi

Titel

Crossover from Localized to Cascade Relaxations in Metallic Glasses

Ist Teil von

• Physical review letters, 2015-07, Vol.115 (4), p.045501-045501, Article 045501

Ort / Verlag

United States: American Physical Society (APS)

Erscheinungsjahr

2015

Quelle

American Physical Society

Beschreibungen/Notizen

• Thermally activated deformation is investigated in two metallic glass systems with different cooling histories. By probing the atomic displacements and stress changes on the potential energy landscape, two deformation modes, a localized process and cascade process, have observed. The localized deformation involves fewer than 30 atoms and appears in both systems, and its size is invariant with cooling history. However, the cascade deformation is more frequently observed in the fast quenched system than in the slowly quenched system. The origin of the cascade process in the fast quenched system is attributed to the higher density of local minima on the underlying potential energy landscape.