冷却速率对Al-6Cu合金共晶成分和固溶度的影响

IF 1.3 4区材料科学 Q3 METALLURGY & METALLURGICAL ENGINEERING

International Journal of Cast Metals Research Pub Date : 2022-11-02 DOI:10.1080/13640461.2022.2146918

Xiang-Jie Wang, Lin-Lin Yang, H. Tan, F. Yu, Jianzhong Cui

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引用次数: 0

摘要

摘要:采用楔形铜模铸造工艺，在2、10、25、100 K/s的冷却速率下制备Al-6Cu合金铸锭，探讨冷却速率对Al-6Cu合金共晶成分面积分数、α-Al晶格参数和相对固溶度的影响。实验结果表明，当冷却速率从2 K/s提高到10 K/s时，α-Al共晶成分的面积分数和晶格参数均有所下降，但α-Al的相对固溶度有所提高。当冷却速率继续达到100 K/s时，共晶成分的面积分数和α-Al晶格参数升高，α-Al的相对固溶度降低。根据固相非扩散-液相不完全混合凝固模型，Al-6Cu合金的相对固溶度随着冷却速率的增大先增大后减小。模型计算结果与实验结果吻合较好。

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Effect of cooling rate on eutectic constituent and solid solubility of Al-6Cu alloy

ABSTRACT The ingots of Al-6Cu alloy were prepared by the wedge-shaped copper mode casting with the cooling rates of 2 K/s, 10 K/s, 25 K/s and 100 K/s to explore the effect of cooling rate on the area fraction of eutectic constituent, α-Al lattice parameter and relative solid solubility. The experimental results revealed that when the cooling rate rose from 2 K/s to 10 K/s, the area fraction of the eutectic constituent and the lattice parameter of α-Al decelerated, but the relative solid solubility of α-Al increased. When the cooling rate continued to reach 100 K/s, the area fraction of the eutectic constituent and the α-Al lattice parameter elevated, lowering the α-Al relative solid solubility. According to the model of non-diffusion of solid phase and incomplete mixed solidification of a liquid phase, as for Al-6Cu alloy, relative solid solubility initially increases and then decreases with a boost in cooling rate. The model results are consistent with the experimental results.

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来源期刊

International Journal of Cast Metals Research 工程技术-冶金工程

CiteScore

2.70

自引率

7.10%

发文量

审稿时长

7.5 months

期刊介绍： The International Journal of Cast Metals Research is devoted to the dissemination of peer reviewed information on the science and engineering of cast metals, solidification and casting processes. Assured production of high integrity castings requires an integrated approach that optimises casting, mould and gating design; mould materials and binders; alloy composition and microstructure; metal melting, modification and handling; dimensional control; and finishing and post-treatment of the casting. The Journal reports advances in both the fundamental science and materials and production engineering contributing to the successful manufacture of fit for purpose castings.