Response of Fe-Cr-Mn austenitic alloys to thermal aging neutron irradiation

Conference · Tue Sep 01 04:00:00 EDT 1987

OSTI ID:5576648

Garner, F A; Abe, F; Noda, T

The Fe-Cr-Mn austenitic alloy system is being studied as a replacemnet of the Fe-Cr-Ni system for fusion applications in which reduced long-term radioactivation is an important consideration. This paper describes two aspects of the respone of this alloy system to material and environmental variables. First, the neutron-induced void swelling of simple binary and ternary alloys is investigated as a function of composition, thermal-mechanical treatment, temperature (693 to 873K) and displacement level (9 to 76 dpa). The swelling rate of this alloy system approaches 1%/dpa for those conditions which do not favor formation of large levels of ferrite phases. Second, the tendency of the potentially detrimental sigma phase to form during thermal aging is explored at high manganese levels. Variables such as carbon concentration, cold-work level and aging time are shown to influence the distribution and rate of sigma formation. 18 refs., 10 figs., 1 tab.

• Research Organization: Pacific Northwest Lab., Richland, WA (USA); National Research Inst. for Metals, Tokyo (Japan)
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 5576648
• Report Number(s): PNL-SA-15322; CONF-871036-29; ON: DE88003415
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700209* -- Fusion Power Plant Technology-- Component Development & Materials Testing
AGING
ALLOYS
AUSTENITIC STEELS
COHERENT SCATTERING
CRYSTAL STRUCTURE
DAMAGING NEUTRON FLUENCE
DENSITY
DIFFRACTION
DISPLACEMENT RATES
GRAIN BOUNDARIES
IRON ALLOYS
IRON BASE ALLOYS
MANGANESE ALLOYS
MATERIALS
MICROSTRUCTURE
NEUTRON FLUENCE
NUCLEATION
PHYSICAL PROPERTIES
SCATTERING
STEELS
SWELLING
TEMPERATURE DEPENDENCE
THERMONUCLEAR REACTOR MATERIALS
VOIDS
X-RAY DIFFRACTION