A study of dislocation transmission through a grain boundary in hcp Ti-6Al using micro-cantilevers
A study of dislocation transmission through a grain boundary in hcp Ti-6Al using micro-cantilevers
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DOI：
10.1016/j.actamat.2015.10.023
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发表时间：
2016-01-15
期刊：
影响因子：
9.4
通讯作者：
Jones, Ian P.
中科院分区：
文献类型：
--
作者：
Ding, Rengen;Gong, Jicheng;Jones, Ian P.
采用聚焦离子束（FIB）加工技术，在Ti-6Al合金试样中加工出了具有等边三角形横截面和底部为顶点的微悬臂梁。使用纳米压头使微悬臂梁变形。通过< a >控制微悬臂梁沿着的晶体取向，在上晶粒中选择性地激活了棱镜滑移系统。使用双束FIB从变形的微悬臂梁制备用于透射电子显微镜（TEM）的样品。利用明场扫描透射电子显微镜研究了滑移在晶界上的传播过程。(c)2015 Acta Materialia Inc.由爱思唯尔有限公司出版。保留所有权利。
Micro-cantilevers with an equilateral triangular cross-section and an apex at the bottom were machined across grain boundaries in a Ti-6Al alloy sample using a focused ion beam (FIB). A nanoindenter was used to deform the micro-cantilevers. An < a > prism slip system was selectively activated in the upper grain by controlling the crystal orientation along the micro-cantilever. Specimens for transmission electron microscopy (TEM) were prepared from the deformed micro-cantilevers using dualbeam FIB. Bright field scanning transmission electron microscopy was used to investigate the process of slip propagation through the grain boundary.(c) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.