Recent Developments in Irradiation-Resistant Steels

Advanced fission and future fusion energy will require new high- performance structural alloys with outstanding properties that are sustained under long-term service in ultrasevere environments, including neutron damage producing up to 200 atomic displacements per atom and, for fusion, 2000 appm of...

Full description

Saved in:
Bibliographic Details
Published in:Annual review of materials research 2008-01, Vol.38 (1), p.471-503
Main Authors: Odette, G R, Alinger, MJ, Wirth, B D
Format: Article
Language:English
Subjects:
Alloys
Atomic structure
Creep (materials)
Damage
Dispersion hardening alloys
Embrittlement
Nanostructure
Nuclear power generation
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Advanced fission and future fusion energy will require new high- performance structural alloys with outstanding properties that are sustained under long-term service in ultrasevere environments, including neutron damage producing up to 200 atomic displacements per atom and, for fusion, 2000 appm of He. Following a brief description of irradiation damage and damage resistance, we focus on an emerging class of nanostructured ferritic alloys (NFAs) that show promise for meeting these challenges. NFAs contain an ultrahigh density of Y-Ti-O-enriched dispersion-strengthening nanofeatures (NFs) that, along with fine grains and high dislocation densities, provide remarkably high tensile, creep, and fatigue strength. The NFs are stable under irradiation up to 800C and trap He in fine-scale bubbles, suppressing void swelling and fast fracture embrittlement at lower temperatures and creep rupture embrittlement at high temperatures. The current state of the development and understanding of NFAs is described, along with some significant outstanding challenges.
ISSN:1531-7331
1545-4118
DOI:10.1146/annurev.matsci.38.060407.130315