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

SCRIPTA MATERIALIA

卷:129

Article

Koyama, Motomichi¹  Yamasaki, Daisuke¹  Nagashima, Tatsuya¹  Tasan, Cemal Cem²  Tsuzaki, Kaneaki¹ 

[1] Kyushu Univ, Dept Mech Engn, Nishi Ku, Motoka 744, Fukuoka, Fukuoka 8190395, Japan

[2] MIT, Dept Mat Sci & Engn, 77 Massachusetts Ave, Cambridge, MA 02139 USA

关键词: Silver decoration;    Hydrogen;    In situ observation;    Pure iron;    Grain boundary misorientation;   

DOI  :  10.1016/j.scriptamat.2016.10.027

来源: Elsevier

【 摘 要 】

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. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved:

【 授权许可】

Free