Microstructure Control by Utilizing the Instability of Nano-Structure

利用纳米结构的不稳定性控制微观结构

• 批准号: 17360339
• 负责人: DOI Minoru
• 金额: $ 7.51万
• 依托单位: Nagoya Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17360339/
• 关键词: structural materials; heat resisting alloy; microstructure; phase transformation; precipitation; elasticity effect; 相変体

The formation and the stability of two-phase microstructures in some Ni-base and Fe-base alloys were investigated by means of transmission electron microscopy observations. Main results obtained are as follows.1.Phase-separation behaviours which can be seen in the course of formation and evolution of γ+γ' (A1+L12)two-phase microstructure in Ni-Al-Ti ternary alloys exhibit various aspects depending on the alloy compositions, heat-treatment conditions, etc, as follows.(1) Phase-separation of γ solid solution takes place to form γ precipitate particles in y matrix.(2) Phase-separation of γ' solid solution (γ' intermetallics)takes place to form γ precipitate particles in γ' matrix.(3)Phase-separation of γ' precipitates, which appear due to the phase-separation of γ solid solution, takes place to form γ particles in each γ' precipitate.2.The phenomenon that the phase-separation of precipitate particles takes place to form new particles in each precipitate can be seen not only in γ+γ' microstructure in Ni-base alloys but also in other two-phase microstructures such as A2-FD03 in Fe-base alloys.3.In the course of the phase-separation of precipitate particles, the size of each precipitate does not change practically.4.TEM tomography can successfully be applied to observe the three-dimensional morphology of precipitates in a Ni-Al-Ti alloy.5.Utilizing the phase-separation phenomenon of two-phase microstructure(i.e. the phase separation of already existing precipitates)is important and useful to obtain a stable two-phase microstructure desirable to heat resisting alloys.

用透射电镜观察了几种镍基和铁基合金中两相组织的形成和稳定性。主要结果如下：1. Ni-Al-Ti三元合金中γ+γ'（A1+L12）两相组织的形成和演变过程中的相分离行为随合金成分、热处理条件等的不同而表现出不同的特点。(1)γ固溶体发生相分离，在γ基体中形成γ沉淀颗粒。(2)γ'固溶体（γ'金属间化合物）发生相分离，在γ'基体中形成γ沉淀颗粒。（3）γ固溶体分相导致的γ'相的分相，2.沉淀相发生分相而在每个γ'相中形成新的颗粒的现象不仅在Ni基合金的γ+γ'相组织中存在，而且在Fe基合金的A2-FD 03两相组织中也存在。3.在沉淀颗粒的相分离过程中，TEM层析成像技术可以成功地应用于观察Ni-Al-Ti合金中析出相的三维形貌（即，已经存在的沉淀物的相分离）对于获得耐热合金所需的稳定的两相微结构是重要的和有用的。

项目成果

Two-phase microstmctures of gamma+gamma-prime formed by phase-separation due to heat-treatments of elastically constrained Ni-Al-Ti alloys

弹性约束 Ni-Al-Ti 合金热处理相分离形成的 γ γ ′ 两相显微组织

• 发表时间: 2007
• 期刊: Mater. Sci. Forum 539-543
• 作者: T.;Yamamuro;Y.;Morizono;J.;Honjyo;M.;Nishida;西田 稔(分担執筆);西田 稔(分担執筆);T. Aoyagi;滝沢博胤;T. Aoyagi;H. Takizawa;Takuya Aoyagi;滝沢博胤;H. Takizawa;滝沢博胤;滝沢博胤;H. Takizawa;H. Takizawa;滝沢博胤;Z.J. Wang;Z.J. Wang;Z. J. Wang;J. J. Wang;Z.J.Wang;T. Aoyagi;T. Aoyagi;青柳拓也;T. Aoyagi;米澤岳洋;青柳拓也;T. Aoyagi;岡田福太郎;F. Okada;岡田福太郎;青柳拓也;F. Okada;T. Aoyagi;岡田福太郎;F. Okada;H. Takizawa;H. Takizawa;H. Takizawa;岡田福太郎;F. Okada;H. Takizawa;滝沢博胤;M. Doi
• 通讯作者: M. Doi

Formation of Ti2FeSn Compound and Phase Equilibria at the Ti-Fe Side of Ti-Fe-Sn Ternary System

Ti-Fe-Sn三元体系Ti2FeSn化合物的形成及Ti-Fe侧的相平衡

• 发表时间: 2007
• 期刊: Ti-2007 Science and Technology, Proc. 11th World Conference on Titanium (JIMIC5), ed M. Niinomi, et. al. JIM, Sendai 2
• 作者: T. Kozakai;T. Moritani;M. Doi
• 通讯作者: M. Doi

Precipitations of Cubic γ' and Tetragonal γ" Ordered Phases in Disordered Ni-V-Al Alloys and the Morphology of Microstructures

无序Ni-V-Al合金中立方γ和四方γ"有序相的析出及显微组织形貌

• 发表时间: 2005
• 期刊: Proc. Inter. Cont. on Solid-> Solid Phase Transformations in Inorganic Materials 2005 (PTM2005) ed. J. M. Howe, et. al. 1
• 作者: Takao;Kozakai;Keiichi;Makino;Tomokazu;Moritani;Minoru;Doi
• 通讯作者: Doi

Two-phase microstructures formed by phase-separations of ordered precipitates in Fe-Si-V alloys.

Fe-Si-V 合金中有序析出物相分离形成的两相微观结构。

• 发表时间: 2007
• 期刊: Mater. Sci. Forum 561-565
• 作者: T.;Yamamuro;Y.;Morizono;J.;Honjyo;M.;Nishida;西田 稔(分担執筆);西田 稔(分担執筆);T. Aoyagi;滝沢博胤;T. Aoyagi;H. Takizawa;Takuya Aoyagi;滝沢博胤;H. Takizawa;滝沢博胤;滝沢博胤;H. Takizawa;H. Takizawa;滝沢博胤;Z.J. Wang;Z.J. Wang;Z. J. Wang;J. J. Wang;Z.J.Wang;T. Aoyagi;T. Aoyagi;青柳拓也;T. Aoyagi;米澤岳洋;青柳拓也;T. Aoyagi;岡田福太郎;F. Okada;岡田福太郎;青柳拓也;F. Okada;T. Aoyagi;岡田福太郎;F. Okada;H. Takizawa;H. Takizawa;H. Takizawa;岡田福太郎;F. Okada;H. Takizawa;滝沢博胤;M. Doi;T. Kozakai;M. Doi;M. Doi
• 通讯作者: M. Doi

Two-Phase Microstructures of Gamma+Gamma-Prime Formed by Phase-Separations due to Heat-Treatments of Elastically Constrained Ni-Al-Ti Alloys

弹性约束 Ni-Al-Ti 合金热处理相分离形成的 Gamma Gamma-Prime 两相显微组织

• 发表时间: 2007
• 期刊: Mater. Sci. Forum 539/543
• 作者: M. Doi;T. Kozakai;T. Moritani;S. Naito
• 通讯作者: S. Naito