Phase transformation of metastable discontinuous precipitation products to equilibrium phases in U10Mo alloys

被引：23
作者：
Devaraj, Arun [1 ]
Kautz, Elizabeth [1 ]
Kovarik, Libor [2 ]
Jana, Saumyadeep [3 ]
Overman, Nicole [3 ]
Lavender, Curt [3 ]
Joshi, Vineet V. [3 ]
机构：
[1] Pacific Northwest Natl Lab, Phys & Computat Sci Directorate, POB 999, Richland, WA 99354 USA
[2] Pacific Northwest Natl Lab, Environm Mol Sci Lab, POB 999, Richland, WA 99354 USA
[3] Pacific Northwest Natl Lab, Energy & Environm Directorate, POB 999, Richland, WA 99354 USA
来源：
SCRIPTA MATERIALIA | 2018年 / 156卷
关键词：
Phase transformation; Discontinuous precipitation; Microstructural evolution; Characterization; DU-XMO ALLOYS; FUEL;
D O I：
10.1016/j.scriptamat.2018.07.010
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The discontinuous precipitation (DP) mechanism is prevalent in over 80 alloy systems. We report a new type of DP occurring along prior gamma-UMo grain boundaries of an alloy of uranium with 10 wt% molybdenum (U10Mo) during annealing at 500 degrees C, forming alternate lamellae of Mo-enriched gamma-UMo and alpha-U. During prolonged annealing, the metastable Mo-enriched gamma-UMo lamellae gradually transform into a composite mixture of equilibrium gamma'-U2Mo embedded in Mo-depleted gamma-UMo. Using high resolution scanning transmission electron microscopy and atom probe tomography, a comprehensive description of the structural and compositional changes of the metastable lamellar DP product to near-equilibrium phases is provided. (C) 2018 Published by Elsevier Ltd on behalf of Acta Materialia Inc.
引用
收藏
页码：70 / 74
页数：5
相关论文
共 12 条
  • [1] Microstructural characteristics of DU-xMo alloys with x=7-12 wt%
    Burkes, Douglas E.
    Hartmann, Thomas
    Prabhakaran, Ramprashad
    Jue, Jan-Fong
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2009, 479 (1-2) : 140 - 147
  • [2] Mechanical Properties of DU-xMo Alloys with x=7 to 12 Weight Percent
    Burkes, Douglas E.
    Prabhakaran, Ramprashad
    Jue, Jan-Fong
    Rice, Francine J.
    [J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2009, 40A (05): : 1069 - 1079
  • [3] Devaraj A, 2016, DETECTING EXTENT EUT
  • [4] Devaraj A., 2016, HIGH RESOLUTION CHAR
  • [5] Grain boundary engineering to control the discontinuous precipitation in multicomponent U10Mo alloy
    Devaraj, Arun
    Kovarik, Libor
    Kautz, Elizabeth
    Arey, Bruce
    Jana, Saumyadeep
    Lavender, Curt
    Joshi, Vineet
    [J]. ACTA MATERIALIA, 2018, 151 : 181 - 190
  • [6] Kinetics of cellular transformation and competing precipitation mechanisms during sub-eutectoid annealing of U10Mo alloys
    Jana, S.
    Devaraj, A.
    Kovarik, L.
    Arey, B.
    Sweet, L.
    Varga, T.
    Lavender, C.
    Joshi, V.
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2017, 723 : 757 - 771
  • [7] High-density, low-enriched uranium fuel for nuclear research reactors
    Keiser, DD
    Hayes, SL
    Meyer, MK
    Clark, CR
    [J]. JOM-JOURNAL OF THE MINERALS METALS & MATERIALS SOCIETY, 2003, 55 (09): : 55 - 58
  • [8] Discontinuous reactions in solids
    Manna, I
    Pabi, SK
    Gust, W
    [J]. INTERNATIONAL MATERIALS REVIEWS, 2001, 46 (02) : 53 - 91
  • [9] IRRADIATION PERFORMANCE OF U-Mo MONOLITHIC FUEL
    Meyer, M. K.
    Gan, J.
    Jue, J. F.
    Keiser, D. D.
    Perez, E.
    Robinson, A.
    Wachs, D. M.
    Woolstenhulme, N.
    Hofman, G. L.
    Kim, Y. S.
    [J]. NUCLEAR ENGINEERING AND TECHNOLOGY, 2014, 46 (02) : 169 - 182
  • [10] Ageing characteristics of the metastable gamma phase in U-9 wt.% Mo alloy: experimental observations and thermodynamic validation
    Neogy, S.
    Saify, M. T.
    Jha, S. K.
    Srivastava, D.
    Dey, G. K.
    [J]. PHILOSOPHICAL MAGAZINE, 2015, 95 (26) : 2866 - 2884
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