High-Temperature Microstructural Fences

通过离子注入在表面下引入掺杂剂，将钉钉中心的Welsch阵列（微结构栅栏）引入钉钉晶界。根据获得高强度材料的所需模式，通过层压植入的层状材料来创建块状材料。研究包括离子注入、透射电镜结构表征和力学测试。研究了与在层中创建的栅栏相关的几个参数。这些包括注入浓度、物质、温度和退火后处理。研究包括气泡固定点测定、气泡和晶粒生长动力学以及晶粒尺寸（与Hall-Petch强化有关）。这项研究的一个好处可能是耐蠕变的高温金属合金。提高低温断裂韧性也可能是该研究的成果。* * *

9315755 Welsch Arrays of pinning centers (microstructural fences) are introduced to pin grain boundaries by introducing dopant below the surface by ion implantation. Bulk materials are created by laminating the implanted layered material according to desired patterns for achieving high strength materials. The research involves ion implantation, structural characterization by transmission electron microscopy, and mechanical testing. Several parameters are explored related to the fences that are created in the layers. These include implantation concentration, species, temperature, and post annealing treatment. Studies include bubble pinning point determination, bubble and grain growth kinetics, and grain size (related to Hall-Petch strengthening). %%% A benefit of this research could be creep-resistant metal alloys for high temperature use. Improved low-temperature fracture toughness could also be a product from the research. ***