TRIUMF

Exp. No.

M2098 — Closed

Title of Experiment

Studies of positive muon diffusion and trapping in steels to understand hydrogen embrittlement

Spokesperson(s) for Group

Current Members of Group

Name Institution Status % of research time devoted to experiment
K.M. Kojima TRIUMF Research Scientist
N. Nishida Tokyo Institute of Technology Professor Emeritus
Y. Cai SBQMI/TRIUMF PDF
Marta-Villa de Toro Sanchez U. Edinburgh Student (Graduate)
W. Higemoto Japan Atomic Energy Agency Research Scientist
T.U. Ito Japan Atomic Energy Agency Research Scientist
Masahiko Morinaga Nagoya Industrial Science Research Institute Professor Emeritus

Abstract

By using both positive muon spin rotation and the longitudinal spin relaxation method we study the diffusion and trapping of positive muons in dilute alloys containing the principal alloying elements. The influence of positive muon-impurity interaction and the local strain around the impurity on the diffusion and trapping behaviour will be studied. They are compared with the 1st principle calculations. As the positive muon is a light proton, the new knowledge will make a breakthrough in the studies of hydrogen embrittlement of steels and will help metallurgists to develop new high-strength for understanding the hydrogen embrittlement of steels.