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

• 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
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14F04903/
• 关键词: 原子力材料; 酸化物分散強化鋼; クリープ強度; 微細組織変化; ヘリウム注入; 高温熱処理; ナノ粒子; nuclear materials; oxide dispersion; creep properties; irradiation effect; thermal stability; microstructure; nano-scale particles; ODS steels

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.

研究了一种核用氧化物弥散强化钢（12Cr-ODS）的组织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组织演化的影响。在1473 K下退火时，纳米颗粒非常稳定，并继续析出，而在1673 K下暴露时，纳米颗粒发生了明显的粗化。在1573 K和1673 K保温时间较长，形成了非均匀分布的孔洞，孔洞尺寸明显增大。这可能是由于在制造条件下，ar包裹和预先存在的空洞的生长和/或聚集。1473 K时，除了织构强度降低外，织构无明显变化。在1473 K退火至24 h时，硬度略有下降，但在1573和1673 K退火超过6 h后，硬度有明显下降。注入的氦距表面390 μm，浓度分别为35和70 appm。在873和973 K不同应力条件下，测试了材料的蠕变性能。在973 K时，氦导致蠕变破裂时间和应变破裂略有降低。12Cr-ODS钢具有良好的抗氦辐照性能，这是由于12Cr-ODS钢中纳米粒子密度大、分布分散所致。

项目成果

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

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

• 发表时间: 2014
• 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

Microstructure and mechanical behavior of metallic glass fiber-reinforced Al alloy matrix composites.

• DOI: 10.1038/srep24384
• 发表时间: 2016-04-12
• 期刊: Scientific reports
• 影响因子: 4.6
• 作者: Wang Z;Georgarakis K;Nakayama KS;Li Y;Tsarkov AA;Xie G;Dudina D;Louzguine-Luzgin DV;Yavari AR
• 通讯作者: Yavari AR

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

• 发表时间: 2014
• 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 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