Thermal stability of nanocrystalline Fe-Zr alloys

被引：189
作者：
Darling, K. A. [2 ]
VanLeeuwen, B. K. [1 ]
Koch, C. C. [1 ]
Scattergood, R. O. [1 ]
机构：
[1] N Carolina State Univ, Dept Mat Sci & Engn, Raleigh, NC 27695 USA
[2] USA, Res Lab, Weap & Mat Res Directorate, RDRL WMM B, Aberdeen Proving Ground, MD 21005 USA
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2010年 / 527卷 / 15期
基金：
美国国家科学基金会;
关键词：
Mechanical alloying; Nanostructured materials; Grain growth; GRAIN-GROWTH; SOLUTE SEGREGATION; SIZE; STABILIZATION; NANOSTRUCTURES; TIO2; TEM; NI;
D O I：
10.1016/j.msea.2010.02.043
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Fe-Zr nanocrystalline alloys with an as-milled grain size less than 10 nm were synthesized by ball milling. The microstructure changes due to annealing were characterized using X-ray line broadening, microhardness, focused ion beam channeling contrast imaging, and transmission electron microscopy (TEM). Additions of 1/3 to 4 at.% Zr stabilized nanocrystalline grain sizes at elevated annealing temperatures compared to pure Fe. With 4 at.% Zr, a fully nanocrystalline microstructure with a TEM grain size of 52 nm was retained at temperatures in excess of 900 degrees C. Alloys with lower Zr contents showed less stability, but still significant compared to pure Fe. Bimodal nano-micro grain size microstructures were also observed. (c) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：3572 / 3580
页数：9
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