Correlation between elastic modulus of Al–Cu alloys and metallurgical characteristics of their constituent elements
Correlation between elastic modulus of Al–Cu alloys and metallurgical characteristics of their constituent elements
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Al-Cu合金弹性模量与其组成元素冶金特性的相关性
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
M. Sobhy
中科院分区：
文献类型：
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作者：
M. Abo;H. Esmail;M. Sobhy
在我们之前的工作中，已经提出了Al固溶体合金中晶粒尺寸、活化焓和Cu含量之间的关系。另外，还评价了析出相的体积分数对弹性模量的影响。实验结果表明，随着铜含量增加至~1 at.%，弹性模量值 E exp 增加，随后单调减少。在大约 10 at.% 时，合金的模量降至纯铝以下。已发现平均晶粒尺寸取决于 Cu 含量，并在 3 at.% Cu 时表现出最大值，当 Cu 含量升高到该值以上并分别在室温、100 和 580 °C 时效时，平均晶粒尺寸减小。与 Cu 含量相关的焓活化体积 V* 的行为本质上表明位错交叉点的障碍物密度增加。
In our previous work, the relation between grain size, enthalpy activation volume, and Cu-content in Al solid solution alloys have been presented. Also, the effect of volume fraction of the precipitate phase on the elastic modulus was assessed. The experimental results indicate an increase in the elastic modulus values, E exp, with increasing Cu-content up to ∼1 at.% followed by a monotonic decrease. At approximately 10 at.%, the modulus of the alloys drops below that of the pure Al. The average grain size has been found to depend on the Cu-content and exhibited a maximum value at 3 at.% Cu and decreased when the Cu-content was raised above this value and aged at room temperature, 100 and 580 °C, respectively. The behavior of the enthalpy activation volume, V*, in dependence of the Cu-content essentially suggests an increase in the density of obstacles of dislocation intersections.