Void swelling and microstructure evolution at very high damage level in self-ion irradiated ferritic-martensitic steels

被引：80

作者：

Getto, E. ^{[1
,4
]}

Sun, K. ^{[2
]}

Monterrosa, A. M. ^{[1
]}

Jiao, Z. ^{[1
]}

Hackett, M. J. ^{[3
]}

Was, G. S. ^{[1
,2
]}

机构：

[1] Univ Michigan, Dept Nucl Engn & Radiol Sci, Ann Arbor, MI 48109 USA

[2] Univ Michigan, Dept Mat Sci Engn, Ann Arbor, MI 48109 USA

[3] Terrapower LLC, Bellevue, WA 98005 USA

[4] US Naval Acad, Annapolis, MD 21402 USA

来源：

JOURNAL OF NUCLEAR MATERIALS | 2016年 / 480卷

关键词：

ALLOYS; SUPPRESSION; NUCLEATION; IRONS; PHASE; DPA;

D O I：

10.1016/j.jnucmat.2016.08.015

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The void swelling and microstructure evolution of ferritic-martensitic alloys HT9, T91 and T92 were characterized following irradiation with Fe++ ions at 460 degrees C to damage levels of 75-650 displacements per atom with 10 atom parts per million pre-implanted helium. Steady state swelling rate of 0.033%/ dpa was determined for HT9, the least swelling resistant alloy, and 0.007%/ dpa in T91. In T91, resistance was due to suppression of void nucleation. Swelling resistance was greatest in T92, with a low density (similar to 1 x 10(20) m(-3)) of small voids that had not grown appreciably, indicating suppression of nucleation and growth. Additional heats of T91 indicated that alloy composition was not the determining factor of swelling resistance. Carbon and chromium-rich M2X precipitates formed at 250 dpa and were correlated with decreased nucleation in T91 and T92, but did not affect void growth in HT9. Dislocation and G-phase microstructure evolution was analyzed up to 650 dpa in HT9. Published by Elsevier B.V.

引用

页码：159 / 176

页数：18

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