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Abstract

THE EFFECTS OF PLASMA DISRUPTION PHENOMENA IN TOKAMAK FUSION REACTORS ON THE FIRST WALL COMPONENTS HAVE TO BE CONSIDERED FOR DESIGN PURPOSES. THE HIGH HEAT FLUX CAUSES VAPORIZATION AND THE PRODUCTION OF A MOLTEN LAYER. THE RESULTING DAMAGE CAN BE EVALUATED BY DETERMINING THE PROPERTIES OF THE RESOLIDIFIED AND HEAT AFFECTED MATERIAL. THE MORPHOLOGY, THE MICROSTRUCTURE AND THE MECHANICAL BEHAVIOUR OF SOME RESOLIDIFIED AND HEAT AFFECTED (CR-NI AND CR-MN) AUSTENITIC STAINLESS STEELS, OF INTEREST FOR NUCLEAR FUSION PURPOSES, WERE INVESTIGATED AFTER PLASMA DISRUPTIONS, SIMULATED BY ELECTRON BEAM SPOTS REACHING A POWER OF SEVERAL KW ON AN AREA OF A FEW MILLIMETRES. THE RESULTING DAMAGE ON THE CR-MN STEEL (AMCR 0033) WAS PRIMARILY SOLIDIFICATION CRACKING, WHEREAS IN THE HIGH-MN STAINLESS STEEL (VA64) EXTENSIVE CRACKING OCCURRED AND AN EQUIAXED DENDRITE STRUCTURE FORMED CAUSING EMBRITTLEMENT.

Additional information

Authors: PIATTI G, JRC-ISPRA;POLITECNICO DI TORINO, TORINO, I;ZUBLENA M, JRC-ISPRA;POLITECNICO DI TORINO, TORINO, I;DEL TIN G JRC-ISPRA, JRC-ISPRA;POLITECNICO DI TORINO, TORINO, I;POLITECNICO DI TORINO, TORINO, I, JRC-ISPRA;POLITECNICO DI TORINO, TORINO, I
Bibliographic Reference: PAPER PRESENTED: 3RD INTERNATIONAL CONFERENCE ON FUSION REACTOR MATERIALS, KARLSRUHE/D, OCT. 4-8, 1987; JOURNAL OF NUCLEAR MATERIALS, VOLS. 155-157, PP 407-411, 1988
Record Number: 1989126212800 / Last updated on: 1989-04-01
Category: PUBLICATION
Available languages: en