论文标题
纳米凹痕诱导的变形孪生二型ti $ _2 $ aln
Nanoindentation-induced deformation twinning in MAX phase Ti$_2$AlN
论文作者
论文摘要
塑性变形机制已在最大阶段TI2ALN中进行了研究。纳米引导已被用于诱导单个晶粒中的塑性变形，并通过使用聚焦离子束（FIB）技术在凹痕中在横截面中提取了透射电子显微镜（TEM）Lamella。通过将TEM观测值和自动晶体取向映射（ACOM）相结合，在纳米凹痕烙印下已揭示了高度不良的域（HMD）。由于对这些HMD，{11-22}和{11-21}变形双胞胎之间的相对晶体方向进行了仔细的分析，在最大阶段首次确定了双胞胎。还表征了涉及次级孪生或不同{11-22}双变体的复杂结构。
Plastic deformation mechanisms have been investigated in the MAX phase Ti2AlN. Nanoindentation has been used to induce plastic deformation in a single grain, and a Transmission Electron Microscopy (TEM) lamella has been extracted in cross section through the indent by using Focused Ion Beam (FIB) technique. By combining TEM observations and automated crystal orientation mapping (ACOM), highly misoriented domains (HMD) have been revealed below a nanoindentation imprint. Thanks to a careful analysis of the relative crystal orientations between these HMD, {11-22} and {11-21} deformation twins have been identified for the first time in a MAX phase. Complex structures, involving secondary twinning or different {11-22} twin variants have also been characterized.
