In situ observations of silver-decoration evolution under hydrogen permeation: Effects of grain boundary misorientation on hydrogen flux in pure iron

详细信息    查看全文

• 作者：Motomichi Koyama^a ; ^{koyama@mech.kyushu-u.ac.jp} ; Daisuke Yamasaki^a ; Tatsuya Nagashima^a ; Cemal Cem Tasan^b ; Kaneaki Tsuzaki^a
• 关键词：Silver decoration ; Hydrogen ; In situ observation ; Pure iron ; Grain boundary misorientation
• 刊名：Scripta Materialia
• 出版年：2017
• 出版时间：1 March 2017
• 年：2017
• 卷：129
• 期：Complete
• 页码：48-51
• 全文大小：1448 K
• 卷排序：129

文摘

An in situ silver decoration technique using a light microscope was developed. Hydrogen was introduced from the bottom surface of an annealed pure iron specimen, and its top surface was covered with a chemical solution containing silver ions. Samples were exposed for sufficient time for hydrogen permeation to occur from the back to the top surface. The resultant in situ silver decoration visualized that the hydrogen flux through low-angle grain boundaries is lower than that observed at high-angle grain boundaries. The in situ silver decoration technique can be used for kinetic analysis of solute hydrogen in ferritic iron and steels.