Improvement of strength and conductivity for Cu-Ti alloys aged in a hydrogen atmosphere

氢气氛中时效铜钛合金强度和电导率的提高

• 批准号: 23686104
• 负责人: SEMBOSHI Satoshi
• 金额: $ 6.74万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (A)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011-11-18 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23686104/
• 关键词: 組織制御; 銅合金; 水素; 相変態; 時効析出; 力学特性; 電気伝導性; 構造評価; 導電率; 強度; 透過型電子顕微鏡; X線回折; 導電性材料; 抽出分離; 状態図

We attempted to prepare Cu-Ti based alloys with a high strength and a high electrical conductivity by hydrogenation procedures. The electrical conductivity of Cu-Ti alloys was significantly improved without degradation of the mechanical properties by aging in a hydrogen atmosphere. The strengthening was primarily due to fine dispersion of needle-shaped Cu4Ti precipitates, which was similar with the case of conventional aging in vacuum. The enhancement of the conductivity was due to a reduction of a concentration of solute Ti in the matrix phase, which was caused by co-precipitation of Cu4Ti and TiH2. The balance of the strength and conductivity was improved by aging under a higher hydrogen pressure at a low temperature. Prior-deformation before aging was also useful to improve the properties. Eventually, we demonstrated that optimizing the thermomechanical process conditions imparted an excellent balance of strength and conductivity, of more than 950 MPa and 25% IACS, respectively.

我们尝试通过氢化过程制备具有高强度和高电导率的Cu-Ti基合金。 Cu-Ti合金的电导率显着提高，而在氢气气氛中时效不会降低机械性能。强化主要是由于针状Cu4Ti析出物的细小弥散，这与常规真空时效的情况类似。电导率的提高是由于基体相中固溶Ti浓度的降低，这是由Cu4Ti和TiH2的共沉淀引起的。通过在低温下较高氢压下时效，强度和导电率的平衡得到改善。老化前的预变形也有助于改善性能。最终，我们证明优化热机械工艺条件可以实现强度和电导率的出色平衡，分别超过 950 MPa 和 25% IACS。

项目成果

Fabrication of high-strength and high-conductivity Cu-Ti alloy wire by aging in a hydrogen atmosphere

氢气氛时效制备高强高导铜钛合金丝

• 发表时间: 2013
• 影响因子: 6.2
• 作者: S. Semboshi;T. Takasugi:
• 通讯作者: T. Takasugi:

Aging of Copper-Titanium dilute alloys in hydrogen atmosphere : Influence of prior-deformation on strength and electrical conductivity

铜钛稀合金在氢气氛中的时效：预变形对强度和导电性的影响

• 发表时间: 2011
• 作者: S. Semboshi; S. Orimo; H. Suda; W.L. Gao;A. Sigawara
• 通讯作者: A. Sigawara

Cu-Ti合金に生ずるスピノーダル分解と時効析出のX線散乱法を用いた解析

X射线散射法分析Cu-Ti合金的旋节线分解和时效析出

• 发表时间: 2011
• 作者: 長谷川啓史;佐藤成男;高橋洋平;千星聡;我妻和明
• 通讯作者: 我妻和明

メゾスコピック組織制御分野

细观组织控制场

Aging of Copper-Titanium dilute alloys in hydrogen atmosphere: Influence of prior-deformation on strength and electrical conductivity

铜钛稀合金在氢气氛中的时效：预变形对强度和电导率的影响

• 发表时间: 2011
• 作者: S. Semboshi; S. Orimo; H. Suda; W.L. Gao;A. Sigawara
• 通讯作者: A. Sigawara