Interaction of Migrating Twin Boundaries with Obstacles in Magnesium

• Published in: Metals
• Main Authors: Andriy Ostapovets, Konstantin Kushnir, Kristián Máthis, Filip Šiška
• Format: Article
• Language: English
• Published: MDPI AG 2021-01-01
• Subjects: magnesium; twinning; modeling; void; rigid inclusion
• Online Access: https://www.mdpi.com/2075-4701/11/1/154
• ISSN: 2075-4701

Interaction of migrating <inline-formula><math display="inline"><semantics><mrow><mo>{</mo><mn>10</mn><mover accent="true"><mn>1</mn><mo>¯</mo></mover><mn>2</mn><mo>}</mo></mrow></semantics></math></inline-formula> twin boundary with obstacles was analyzed by atomistic and finite elements computer simulations of magnesium. Two types of obstacles were considered: one is a non-shearable obstacle and another one is the void inside bulk material. It is shown that both types of obstacles inhibit twin growth and increased stress is necessary to engulf the obstacle in both cases. However, the increase of critical resolved shear stress is higher for the passage of the twin boundary through raw of voids than for interaction with non-shearable obstacles.