In Situ Studies on the Irradiation-Induced Twin Boundary-Defect Interactions in Cu
In Situ Studies on the Irradiation-Induced Twin Boundary-Defect Interactions in Cu
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DOI：
10.1007/s11661-017-4293-5
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发表时间：
2017-08
期刊：
影响因子：
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通讯作者：
C. Fan;Jin Li;Jin Li;Z. Fan;Z. Fan;Haiyan Wang;Xinghang Zhang
中科院分区：
文献类型：
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作者：
C. Fan;Jin Li;Jin Li;Z. Fan;Z. Fan;Haiyan Wang;Xinghang Zhang
在透射电子显微镜内，室温下对具有纳米级退火孪晶的多晶Cu薄膜进行原位Kr ++离子辐照，辐照剂量为每原子1个位移。辐射引起非相干孪晶界的显著迁移。根据不同的孪晶厚度，观察到三种类型的孪晶边界的演变，包括快速退孪晶，逐渐退孪晶，和自我愈合。讨论了孪晶厚度对显微组织演化的影响机制。该研究为孪晶边界缺陷相互作用提供了进一步的证据，并可能有助于设计耐辐射孪晶金属材料。
Polycrystalline Cu films with nanoscale annealing twins are subjected toin situKr++ion irradiation at room temperature inside a transmission electron microscope up to a dose of 1 displacement-per-atom. Radiation induces prominent migration of incoherent twin boundaries. Depending on twin thickness, three types of twin boundary evolutions are observed, including rapid detwinning, gradual detwinning, and self-healing. The mechanism of twin thickness-dependent evolution of microstructures is discussed. This study provides further evidence on twin boundary-defect interactions and may assist the design of radiation-tolerant twinned metallic materials.