Influence of Anisotropy in the Elastic Strain Energy on Morphology of Microstructure in Spinodal Decomposition Alloys
Influence of Anisotropy in the Elastic Strain Energy on Morphology of Microstructure in Spinodal Decomposition Alloys
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弹性应变能各向异性对调节分解合金显微组织形貌的影响
DOI：
10.2320/matertrans1960.18.707
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发表时间：
1977
期刊：
影响因子：
--
通讯作者：
H. Mori
中科院分区：
文献类型：
--
作者：
J. Kagawa;T. Miyazaki;H. Mori
采用超声波脉冲回波法对Ni-37.6at%Cu-6.1at%Si和Ni-36.8at%Cu-7.6at%Al合金单晶的弹性能项2η2 Y[hkl]进行了实验测量，并研究了能量各向异性对两种合金金相形貌的影响。 Ni-Cu-Si合金产生具有高度排列区域的典型调制结构，而Ni-Cu-Al合金形成具有更随机区域排列的斑驳结构。两种合金之间的这种形态差异并非来自弹性模量Y[hkl]的各向异性的差异，而是来自每单位组成变化的线性膨胀系数η的差异。在Ni-Cu-Si合金中，q和弹性模量的各向异性足够大，足以产生调制结构，而在Ni-Cu-Al合金中，尽管弹性模量的各向异性相当大，但弹性能对微观结构的形貌没有任何影响，而在Ni-Cu-Al合金中，弹性能对微观结构的形貌没有任何影响。
The elastic energy term,2η2 Y[hkl] was experimentally measured for single crystals of Ni-37.6at% Cu-6.1at%Si and Ni-36.8at%Cu-7.6at%Al alloys by the pulse echo method using the ultrasonic sound wave, and an influence of the anisotropy of the energy on the metallographic morphology was investigated for the two alloys. The Ni-Cu-Si alloy produces the typical modulated structure having highly aligned zones, while the Ni-Cu-AI alloy forms the mottled structure possessing a more random zone arrangement. Such a morphological difference between the both alloys does not come from a difference in anisotropy of the elastic modulusY[hkl] but from a difference in the linear expansion coefficient per unit composition change η. On the Ni-Cu-Si alloy, q and anisotropy of the elastic modulus are large enough to produce the modulated structure, while in the Ni-Cu-Al alloy η is so small that the elastic energy does not make any influence on the morphology of the microstructure, although the anisotropy of the elastic modulus is fairly large.