Rapid solidification of highly undercooled bulk liquid superalloy: recent developments, future directions
Rapid solidification of highly undercooled bulk liquid superalloy: recent developments, future directions
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高度过冷散装液态高温合金的快速凝固：最新进展，未来方向
DOI：
10.1179/174328006x102484
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发表时间：
2006-06
影响因子：
16.1
通讯作者：
Liu F
中科院分区：
文献类型：
--
作者：
Yang GC;Liu F
对深过冷液态高温合金的快速凝固现状进行了评述，并提出了这一重要技术领域的未来研究方向。本文首先研究了新型SiO2-ZrO 2-B2 O3（即Si-Zr-B）复合铸型涂料对多元高温合金熔体的净化机理和制备方法，重点研究了DD 3合金。在此基础上，讨论了过冷多元熔体的热力学和Si-Zr-B涂层的形核抑制作用。还考虑到在一个宽的过冷度制度，特别是枝晶生长的机制和快速凝固的特点的微观结构和亚结构的演变。本文综述了在不同熔体过冷度下，凝固态高温合金中两种晶粒形态的生长机制，以及γ'（Ni_3Al（Ti））相的析出。最后，研究了过冷高温合金熔体在Si-Zr-B涂层铸型中的定向快速凝固，讨论了不同熔体过冷度下产生的超细定向枝晶组织的力学性能。
The status of rapid solidification of highly undercooled bulk liquid superalloys is critically evaluated and future directions of research in this technologically important area are proposed. First, consideration is given to purification mechanisms and preparation of a novel SiO2–ZrO2–B2O3 (i.e. Si–Zr–B) compound mould coating, for multi-component superalloy melts, with an emphasis on DD3 alloy. On this basis, thermodynamics of the undercooled multi-component melt and the nucleation inhibiting effect of the Si–Zr–B coating are discussed. Consideration is also given to evolution of microstructure and sub-structure within a wide undercooling regime, in particular, the mechanism of dendrite growth and the characteristics of rapid solidification. Growth mechanisms for the two types of grain morphology, at low and high undercoolings, are reviewed, as is precipitation of the strengthening phase, γ' (Ni3Al(Ti)), in the as solidified superalloy subjected to different melt undercoolings. Finally, directional rapid solidification of the undercooled superalloy melt in Si–Zr–B coated moulds is considered, which leads on to discussion of the mechanical properties of the ultra-fine directional dendritic structures produced at different melt undercoolings.
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DOI：
10.1007/bf02650266
发表时间：
1991-12-01
期刊：
METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
影响因子：
--
作者：
KURZ, W;TRIVEDI, R
通讯作者：
TRIVEDI, R
影响因子：
4.5
作者：
Feng Liu;Gencang Yang
通讯作者：
Feng Liu;Gencang Yang
影响因子：
5.4
作者：
E. Otero;A. Pardo;F. Pérez;J. F. Álvarez;M. Utrilla
通讯作者：
E. Otero;A. Pardo;F. Pérez;J. F. Álvarez;M. Utrilla
影响因子：
6
作者：
C. Schulze;M. Feller-Kniepmeier
通讯作者：
C. Schulze;M. Feller-Kniepmeier
DOI：
10.1149/1.2428700
发表时间：
1958
期刊：
2013 2nd IAPR Asian Conference on Pattern Recognition
影响因子：
--
作者：
M. Hansen;K. Anderko
通讯作者：
M. Hansen;K. Anderko