酸化物分散強化鋼の高温照射環境下における強度劣化とその機構の解明

高温辐照环境下氧化物弥散强化钢的强度劣化及其机理阐明

基本信息

批准号：
14F04903
负责人：
佐藤裕樹
金额：
$ 1.47万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for JSPS Fellows
财政年份：
2014
资助国家：
日本
起止时间：
2014-04-25 至 2017-03-31
项目状态：
已结题

项目摘要

We studied microstructural evolution and mechanical properties change of an oxide dispersion strengthened steel (12Cr-ODS) for nuclear application.The effect of high-temperature annealing at 1473-1673 K on the coarsening kinetics of nanoparticles and microstructural evolution was systematically investigated. The nanoparticles were extremely stable and continued precipitating during annealing at 1473 K, whereas, significant coarsening took place during exposure at 1673 K. Furthermore, heterogeneously distributed voids were developed, sizes of which increased distinctly at 1573 and 1673 K for longer holding time. This is probably due to the growth and/or aggregation of Ar-entrapped and pre-existed voids in the as-fabricated condition. Additionally, no obvious changes were observed in texture at 1473 K, except that its intensity reduced. The hardness slightly decreased at 1473 K up to 24 h, however, obvious reduction was observed after annealing at 1573 and 1673 K for more than 6 h.The helium implantation experiments were carried out in cyclotron accelerator in Tohoku University. The implanted helium reached 390 μm from the surface, and concentration was 35 and 70 appm. The creep properties were tested at 873 and 973 K with different stresses. The helium leaded to slight reduction in creep time-to-rupture and strain-to-rupture at 973 K. While it shows almost no effects at 873 k. It indicates that 12Cr-ODS steel has the good resistance to helium irradiation, which was derived from the high number density and dispersed nano-particles.

我们研究了核用氧化物弥散强化钢（12Cr-ODS）的微观结构演变和力学性能变化。系统研究了1473-1673 K高温退火对纳米颗粒粗化动力学和微观结构演变的影响。在 1473 K 退火期间极其稳定并持续沉淀，而在 1673 K 暴露期间发生显着粗化K. 此外，形成了不均匀分布的空隙，其尺寸在 1573 和 1673 K 下明显增加，这可能是由于加工时捕获的 Ar 和预先存在的空隙的生长和/或聚集所致。此外，在 1473 K 下，除了硬度在 1473 K 下持续 24 小时略有下降外，没有观察到织构的明显变化。然而，在1573和1673 K退火6小时以上后，观察到明显的减少。氦注入实验是在东北大学的回旋加速器中进行的，注入的氦气距离表面390μm，浓度分别为35和70 appm。在 873 K 和 973 K 下以不同的应力测试了蠕变特性。氦气导致蠕变略有降低。 973 K 时的断裂时间和断裂应变。而在 873 K 时几乎没有影响，这表明 12Cr-ODS 钢具有良好的耐氦辐照性能，这源于其高数密度和分散性。纳米颗粒。

项目成果

期刊论文数量（0）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Effects of fabrication processing on the microstructure and mechanical properties of oxide dispersion strengthening steels

DOI：
10.1016/j.msea.2015.12.032
发表时间：
2016-01
期刊：
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
影响因子：
6.4
作者：
Yanfen Li;Jingjie Shen;Feng Li;Huilong Yang;S. Kano;Y. Matsukawa;Y. Satoh;H. Fu;H. Abe;T. Muroga
通讯作者：
Yanfen Li;Jingjie Shen;Feng Li;Huilong Yang;S. Kano;Y. Matsukawa;Y. Satoh;H. Fu;H. Abe;T. Muroga

Study on Anisotropy of Mechanical Property and Microstructure of 12Cr Ferritic - Oxide Dispersion Strengthened Steel

12Cr铁素体-氧化物弥散强化钢力学性能及显微组织各向异性研究

DOI：
发表时间：
2014
期刊：
影响因子：
0
作者：
Yanfen Li;H. Abe;Y. Satoh;Y. Matsukawa;F. Li;J.J. Shen;T. Muroga
通讯作者：
T. Muroga

Effects of fabrication routes on mechanical properties and microstructure for two 12Cr-ODS ferritic steels

制备工艺对两种12Cr-ODS铁素体钢力学性能和显微组织的影响

DOI：
发表时间：
2014
期刊：
影响因子：
0
作者：
Yanfen Li;F. Li;J.J. Shen;S. Kano;Y. Matsukawa;Y. Satoh;H. Abe;T. Muroga
通讯作者：
T. Muroga

Crystallographic analysis on atomic-plane parallelisms between bcc precipitates and hcp matrix in recrystallized Zr-2.5Nb alloys

DOI：
10.1016/j.actamat.2016.12.053
发表时间：
2017-03
期刊：
Acta Materialia
影响因子：
9.4
作者：
Y. Matsukawa;I. Okuma;H. Muta;Y. Shinohara;R. Suzue;Huilong Yang;T. Maruyama;T. Toyama;Jingjie Shen;Yanfen Li;Y. Satoh;S. Yamanaka;H. Abe
通讯作者：
Y. Matsukawa;I. Okuma;H. Muta;Y. Shinohara;R. Suzue;Huilong Yang;T. Maruyama;T. Toyama;Jingjie Shen;Yanfen Li;Y. Satoh;S. Yamanaka;H. Abe

Stability of as-fabricated and cold-rolled 12Cr-ODS steel during high temperature annealing

成品和冷轧 12Cr-ODS 钢在高温退火过程中的稳定性