Development of DEMO-grade irradiation-resistant copper alloy with meso-heterogeneous nano-composite microstructure

2016 Fiscal Year Final Research Report

• Project/Area Number: 15K14280
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Nuclear fusion studies
• Research Institution: Kyoto University
• Principal Investigator: KASADA RYUTA 京都大学, エネルギー理工学研究所, 准教授 (20335227)
• Co-Investigator(Renkei-kenkyūsha): KONISHI Satoshi 京都大学, エネルギー理工学研究所, 教授 (40354568)
• Research Collaborator: IHIRA Ryota 京都大学, 大学院エネルギー科学研究科, 院生
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: 銅合金 / メカニカルアロイング / 加工熱処理 / 粉末冶金 / 核融合炉 / ダイバータ / 酸化物分散強化

Outline of Final Research Achievements

In order to elucidate the mechanism of simultaneously improving the strength and ductility of Cu subjected to cryogenic rolling and to clarify the applicability of the cryogenic rolling to CuCrZr alloy for improvement of strength properties and irradiation resistance of Cu base material, we investigated microstructure, tensile properties and neutron irradiation effect. In the CuCrZr alloy, heterogenious crystal grain shown in Cu and a following remarkable simultaneous improvement phenomenon of strength and ductility was not obtained, but a brass type texture different from that of room temperature rolling with good ductility was obtained.
In addition, it was shown that water-cooling mechanical alloying method can be applied to Cu alloy as basic experiment of new MA process for development of ODS - Cu alloy having nanocomposite structure.

Free Research Field

核融合材料