|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Accelerated Materials Evaluation for Nuclear Applications Utilizing Irradiation and Integrated Modeling
||In-situ Studies on the Mechanical Properties of He Ion Irradiated Nanotwinned Ag
||Tongjun Niu, Jin Li, Jie Ding, Yifan Zhang, Ruizhe Su, Jaehun Cho, Sichuang Xue, Zhongxia Shang, Di Chen, Yongqiang Wang, Haiyan Wang, Xinghang Zhang
|On-Site Speaker (Planned)
Recent studies show that twin boundaries are effective defect sinks in eliminating radiation-induced defects. However, the influence of radiation-induced defects on the mechanical behavior of nanotwinned (NT) materials is less well understood. In this study, we investigate the mechanical properties of He ion irradiated NT Ag using in-situ micropillar compression tests. Post-compression TEM analysis of deformed pillars shows that deformation induces prominent detwinning in as-deposited NT Ag, whereas He bubbles and stacking faults (SFs) generated during irradiation leads to much less detwinning in irradiated Ag. The radiation hardening mechanism and the influence of He bubbles on the deformation behavior of NT Ag are discussed.