TRANSFORMATION KINETICS OF URANIUM-MOLYBDENUM ALLOYS
TRANSFORMATION KINETICS OF URANIUM-MOLYBDENUM ALLOYS
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DOI：
10.2172/4376847
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发表时间：
1954-10
期刊：
影响因子：
--
通讯作者：
H. Saller;F. Rough;A. A. Bauer-A.
中科院分区：
文献类型：
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作者：
H. Saller;F. Rough;A. A. Bauer-A.
本文研究了铀-钼系中亚稳γ的转变动力学和方式。在等温转变过程中进行的电阻测量，由金相和硬度数据的支持，表明γ-δ转变是一个有序的反应，这可能是通过有序相的成核和生长进行的。从30 a/o合金的电阻测量和金相观察推断出转变的“C曲线”型行为。老化效应归因于有序相沉淀之前基质中的相干应力。21 a/o钼合金的γ相通过成核和生长机制分解以产生α和δ相的层状分布。有序的中间相δ是体心四元晶系，a = 6.84 A，c =6.55 A。证实了δ相高铀侧的溶解度极限。
The kinetics and mode of transformation of metastable gamma in the uranium-molybdenum system have been investigated. Electrical-resistance measurements made during isothermal transformation, supported by metallographic and hardness data, indicate the gamma-to-delta transformation to be an ordering reaction which probably proceeds by nucleation and growth of the ordered phase. A "C-curve" type behavior for the transformation is inferred from resistance measurements and metallographic observations of the 30 a/o alloy. An aging effect is attributed to coherency stresses in the matrix prior to precipitation of the ordered phase. The gamma phase of the 21 a/o molybdenum alloy decomposes by a nucleation and growth mechanism to yield a lamellar distribution of the alpha and delta phases. The ordered, intermediate phase, delta, is body-centered tetragonal with a = 6.84 A and c =6.55 A. The solubility limits on the high-uranium side of the delta phase are substantiated.