Effects of electric field aging on the precipitation of θ(Al2Cu) phase in 2014 aluminum alloy
Journal Title: Science Paper Online - Year 2009, Vol 4, Issue 4
Abstract
Effects of the electric field aging at 170 ℃ for 6, 8, 10 and 12 h on precipitation behaviors of 2014 aluminum alloy were investigated by transmission electron microscope (TEM). The results show that electric field can reduce the size of the precipitation phase θ(Al2Cu) and increase the dispersion of the fine precipitations. Especially, this kinds of effect is very evident when the aging time is 12 h, the dispersion degree of the fine precipitations is increased with increasing the intensity of electric field. This is because that the nucleation and growth of the precipitation phase θ(Al2Cu) are changed by the electric field aging.
Authors and Affiliations
Botao Xiao, Changshu He, Minglong Gong, Xiang Zhao
Keywords
Related Articles
- EP ID EP96845
- DOI -
- Views 83
- Downloads 0
仅采用Fr(φ)项的中长基线解算法的研究
仅采用Fr(φ)项的基线向量解算法由于不进行周跳的探测和修复，以及整周模糊度的确定等工作，无法利用双频观测值来消除电离层延迟，因而只能用于短基线向量的解算。利用IGS提供的全球电离层格网图GIM来进行电离层延迟改正，取得了较好的效...
一种含三氟甲基侧基的聚酰胺酰亚胺的<br /> 合成与性能研究<br />
本文采用分子设计的方法，合成一种新型含三氟甲基侧基的二氨单体。并运用一步合成法，得到高分子量可溶性聚酰胺酰亚胺。通过1HNMR、FT-IR、TGA 、DSC等对所制备聚合物的结构和性能进行了表征。结果表明，合成的聚合物为无规高分子结构，...
高效个性化PageRank算法综述
对高效的个性化PageRank算法进行综述，从个性化程度、可扩展性、计算效率和精确度等方面对部分个性化算法、可扩展的PPV算法和混合算法等3类算法进行了详细分析和比较，并讨论了目前工作中的不足及未来的研究方向。
一种基于网络行为特征的分布式LDoS攻击
利用遗传算法设计了一种分布式低速率拒绝服务攻击。在该攻击中，各攻击分布结点的行为是正常的、非周期性的，但它们的攻击叠加效果等同于经典的低速率拒绝服务攻击；同时，该攻击模式符合网络流量行为特征，所以更加难以检测和追踪定位攻...
Key concerns about hydrogen safety of fuel cell vehicles
The development of hydrogen safety of fuel cell vehicles (FCVs), including safety measures, testing experiment, and daily maintenance of on-board hydrogen system, were introduced based on long term experimental experienc...