High strength and high conductivity nanoparticle-precipitated copper ally : optimizaiton of thermomechanical processing

高强度和高导电性纳米颗粒沉淀铜合金：热机械加工的优化

• 批准号: 15560601
• 负责人: FUJII Toshiyuki
• 金额: $ 1.86万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15560601/
• 关键词: precipitation hardening; crystallographic orientation relationship; invariant line; yield stress; high resolution electron microscopy; particle shape; age hardening; 時効析出; 不変線; 降伏点降下現象; ナノ粒子; 粒子形態; 形状安定性; 分散強化; 高導電性Cu基合金; 加工熱処理; 飽和磁化; 磁気異

Crystallography and morphology of precipitate particles in Cu-Fe-Co, Cu-Co-Cr and Cu-Ni-Si alloys were investigated. From experiments using Cu-Fe-Co alloys, it has been found that fcc Fe-Co particles transform into bcc particles by applying magnetic field. Transformability of the particles strongly depends on the particle size, cooling rate and the composition of the particles. It has been found that the magnetic field is useful to control microstructures without any deformation of a specimen.Through extensive investigation using Cu-Ni-Si alloys, it has been found that the crystallographic orientation relationship between Ni_2Si precipitate particles and a Cu matrix, (110)_<Cu>//(001)_<Ni2Si>, [001]_<Cu>//[010] _<Ni2Si>, is satisfied. The Ni_2Si particles tend to grow along the invariant-line direction. The strength is strongly affected by not only the size but also the shape of particles. The elongated shape of the particles results in retarding the peak aging time. We concluded that we are able to obtain the optimum aging condition for the maximum strength with precise consideration of the shape of particles.

研究了Cu-Fe-Co、Cu-Co-Cr和Cu-Ni-Si合金中析出相的晶体学和形貌。通过对Cu-Fe-Co合金的实验研究发现，在磁场作用下，Fe-Co合金中的fcc结构的颗粒转变为bcc结构的颗粒。颗粒的可变形性强烈地取决于颗粒的尺寸、冷却速率和颗粒的组成。通过对Cu-Ni-Si合金的大量研究，发现Ni_2Si沉淀颗粒与Cu基体之间的晶体取向关系满足（110）_<Cu>//（001）_<Ni2Si>，[001]_<Cu>//[010] _<Ni2Si>。Ni_2Si颗粒倾向于沿沿着生长。强度不仅受颗粒大小的影响，而且受颗粒形状的影响。颗粒的细长形状导致延迟峰值老化时间。我们的结论是，我们能够获得最佳的老化条件，最大强度与精确考虑的颗粒形状。

项目成果

田村 友和: "Co-Cr粒子を含むCu合金単結晶の磁気特性評価と電子顕微鏡観察"日本金属学会春期講演概要. 132. 453 (2003)

Tomokazu Tamura：“含Co-Cr颗粒的Cu合金单晶的磁性能评估和电子显微镜观察”日本金属学会春季讲座摘要。

エネルギー論による転位上優先析出の理解

基于能量学理解位错的择优沉淀

• 发表时间: 2004
• 期刊: まてりあ 43・11
• 作者: N.Kobayashi;大野 良;N.Kobayashi;R.Ono;N.Kobayashi;大野良;藤居 俊之
• 通讯作者: 藤居 俊之

Morphology and Growth Direction of Precipitate Particles in a Cu-Ni-Si Alloy

Cu-Ni-Si合金中析出相的形貌和生长方向

• 发表时间: 2005
• 期刊: Collected Abstracts of the 45th Meeting of Japan Research Institute for Advanced Copper-Base material ane technologies 45
• 作者: N.Kobayashi;大野 良;N.Kobayashi;R.Ono
• 通讯作者: R.Ono

Magnetic Field-Induced martensitic transformation of Fe-Co Particles in a Cu matrix

Cu 基体中 Fe-Co 颗粒的磁场诱导马氏体转变

• 发表时间: 2003
• 期刊: Materials Transactions 44・12
• 作者: N.Kobayashi;大野 良;N.Kobayashi;R.Ono;N.Kobayashi;大野良;藤居 俊之;T.Fujii;S.Onaka;T.Fujii
• 通讯作者: T.Fujii

Morphological stability of inclusions : two-dimensional analysis with a superelliptic approximation

夹杂物的形态稳定性：采用超椭圆近似的二维分析

• 发表时间: 2005
• 期刊: Materials Science and Engineering A 392
• 作者: N.Kobayashi