Nano-particle precipitation in mechanically alloyed and annealed precursor powders of legacy PM2000 ODS alloy

被引：26
作者：
Dawson, Karl [1 ]
Haigh, Sarah J. [2 ]
Tatlock, Gordon J. [1 ]
Jones, Andy R. [1 ]
机构：
[1] Univ Liverpool, Sch Engn, Ctr Mat & Struct, Liverpool L69 3GH, Merseyside, England
[2] Univ Manchester, Ctr Mat Sci, Sch Mat, Manchester M13 9PL, Lancs, England
来源：
JOURNAL OF NUCLEAR MATERIALS | 2015年 / 464卷
基金：
英国工程与自然科学研究理事会;
关键词：
DISPERSION-STRENGTHENED ALLOYS; FERRITIC STEEL; OXIDE PARTICLES; TEMPERATURE; RECRYSTALLIZATION; MICROSTRUCTURE; NANOCLUSTERS; DIFFRACTION; MORPHOLOGY; STABILITY;
D O I：
10.1016/j.jnucmat.2015.04.039
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The early stages of nano-particulate formation in mechanically alloyed and annealed, precursor powders used to manufacture the legacy commercial oxide dispersion strengthened alloy PM2000, formerly produced by Plansee GmbH, have been investigated. Powders were analysed in both the as-mechanically-alloyed condition and after annealing over the temperature range 923-1423 K. The nucleation and growth of coherent nano-particles in the partially recovered, fine grained, ferritic matrix of powders annealed at temperatures as low as 923 K has been confirmed. Powders annealed for 1 h at temperatures of 1123 K and 1223 K were partially recrystallised and contained high number densities (N-v > 10(23) m(-3)) of coherent 2 nm yttrium-aluminium-oxygen rich nano-particles. The identification of particle free zones in recrystallised grains, adjacent to recrystallising interfaces, plus the identical orientation relationships between nano-particles and the matrices in both unrecrystallised and recrystallised grains, indicates that the Y-Al-O nano-particles, first formed in fine grained regions, are dissolved during recrystallisation and re-precipitated subsequently in recrystallised grains. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：200 / 209
页数：10
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