Microstructure and Hardness Variation in a TIG Weldment of Irradiated F82H

Journal Article · Tue Jul 15 00:00:00 EDT 2003 · Fusion Science and Technology

OSTI ID:20849516

Tanigawa, H ^[1]; Ando, M ^[1]; Sawai, T ^[1]; Shiba, K ^[1]; Hashimoto, N ^[2]; Klueh, R L ^[2]

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1. Japan Atomic Energy Research Institute (Japan)
2. Oak Ridge National Laboratory (United States)

Previous work reported that a TIG weld joint of F82H exhibited low irradiation hardening in a tensile test, compared to the base metal. Microhardness tests and microstructure observation on the neutron-irradiated TIG weld joint of F82H revealed that the over-tempered zone in the heat-affected zone (HAZ) exhibited this good performance. The region in the HAZ where the prior austenite grain size became very fine during welding also exhibited lower irradiation hardening. Hypotheses for these low-hardening mechanisms were proposed based on the phase diagram and grain size.

• OSTI ID: 20849516
• Journal Information: Fusion Science and Technology, Vol. 44, Issue 1; Other Information: Copyright (c) 2006 American Nuclear Society (ANS), United States, All rights reserved. http://epubs.ans.org/; Country of input: International Atomic Energy Agency (IAEA); ISSN 1536-1055
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AUSTENITE
GRAIN SIZE
HEAT AFFECTED ZONE
IRRADIATION
MICROHARDNESS
NEUTRONS
NICKEL ALLOYS
PERFORMANCE
PHASE DIAGRAMS
RADIATION HARDENING
THERMONUCLEAR REACTOR MATERIALS
VARIATIONS
WELDED JOINTS
WELDING