Light Element Analysis in Steel by High-Energy Heavy-Ion TOF-ERDA (Elastic Recoil Detection Analysis)

Wan Honga,b,c, Shinjiro Hayakawab, Kuniko Maedac, Shigekazu Fukudac, Minoru Yanokurac, Michi Aratanid, Kazuie Kimurac, Yohichi Gohshib and Isao Tanihatac

aKorea Institute of Geology, Mining & Materials (KIGAM), Yusung-Ku Kajeong-dong, Taejeon, 305-350, Korea
bThe university of Tokyo, 3-1, Hongo 7 chome, Bunkyo-Ku, Tokyo, Japan
cThe Institute of Physical and Chemical Research (RIKEN), Wako, Saitama, 351-01, Japan
dInstitute for Environmental Sciences, Rokkashomura, Aomori, Japan


Abstract

TOF-ERDA using high-energy heavy ions has been applied to determining the composition of light elements in stainless-steel (SUS304) samples before and after welding in order to monitor the variation in the composition of light elements in sample surfaces during a welding process. An argon-welding method using a welding rod (SUS304) and an arc-welding method using a welding rod were used to prepare samples. Four samples, welded and non-welded using two welding methods, were measured. 40Ar ions accelerated to 40.3 MeV were used as a probe.
Carbon, oxygen and sodium were measured. It was found that the oxygen distributions near to the surfaces of the welded samples increased compared with those of the non-welded samples. However, variations in the carbon distributions were relatively smaller than that of oxygen distributions.

Spectrochim. Acta B54(1999)151

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