On the Sublattice Formalism Applied to the B2 Phase
On the Sublattice Formalism Applied to the B2 Phase
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DOI：
10.1515/ijmr-1999-900114
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发表时间：
1999-01
影响因子：
0.8
通讯作者：
N. Dupin;I. Ansara
中科院分区：
文献类型：
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作者：
N. Dupin;I. Ansara
B2期紊乱进入A2期。这两个阶段的热力学行为可以模拟两个亚晶格（SL）模型。一个新的制定这个模型，指定为修改的子晶格（MSL）形式主义，已被引入，以简化其使用模型的有序-无序变换。允许SL模型转换成MSL形式主义的方程中的二进制，三元和四元的情况下。它们表明，MSL的一些有序参数是自由的，不应该在评估过程中使用。两个实际情况下的转换，为铝-镍和镍-钛系统，进行了讨论。
The B2 phase disorders into the A2 phase. The thermodynamic behaviour of these two phases can be modelled by a two sublattice (SL) model. A new formulation of this model, designated as modified sublattice (MSL) formalism, has been introduced to simplify its use to model order-disorder transformations. The equations allowing the conversion of the SL model into the MSL formalism are presented in the binary, ternary and quaternary cases. They show that some ordering parameters of the MSL are free and should not be used in an assessment procedure. Two practical cases of conversion, for the Al-Ni and Ni-Ti systems, are discussed.