Moessbauer analysis of heat affected zones of an SA 508 steel weld

Journal Article · Fri Dec 18 04:00:00 EST 1998 · Scripta Materialia

DOI:https://doi.org/10.1016/S1359-6462(98)00428-X· OSTI ID:328247

Kwon, S J; Oh, S J; Kim, S; Lee, S ^[1]; Kim, J H ^[2]

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1. Pohang Univ. of Science and Technology (Korea, Republic of)
2. Korea Atomic Energy Research Inst., Daejon (Korea, Republic of). Nuclear Materials Technology Development Team

Microstructure of a heat affected zone (HAZ) in a weld is influenced by many factors such as chemical composition, welding condition, and peak temperature. It is more complex under multi-pass welding because of the repeated heat input. For the analysis of the HAZ microstructure, optical microscope, electron microscope, and X-ray diffraction techniques have been widely used. However, their application is limited since they can hardly make quantitative analysis of HAZ where numerous phases such as martensite, bainite, ferrite, pearlite, austenite, and carbides are co-existing. Moessbauer spectroscopy, in such a case, is particularly useful due to the capability of quantitative analysis on the fraction of each phase. In this study, phases present in the HAZ of an SA 508 steel were identified, and their fractions were quantitatively determined by Moessbauer spectroscopy in conjunction with microscopic observations.

• OSTI ID: 328247
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 2 Vol. 40; ISSN 1359-6462; ISSN SCMAF7
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
HEAT AFFECTED ZONE
MICROSCOPY
MICROSTRUCTURE
SPECTROSCOPY
STEELS
WELDED JOINTS