A study of the suppression of the high-temperature helium embrittlement in an oxide-particle dispersion strengthened alloy

• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2008,（21）
• 页码范围: 3416-3421
• 页数: 6页
• 语种: 英文
• DOI: 10.1007/s 11434-008-0446-7

摘要

In this paper, an investigation on the micro-structure of an Fe-base oxide-dispersion-strengthened (ODS) alloy irradiated with high-energy 20Ne ions to different doses at a temperature around 0.5Tm (Tm is the melting point of the alloy) is presented. Investigation with the transmission electron microscopy found that the accelerated growth of voids at grain-boundaries, which is usually a concern in conven-tional Fe-base alloys under conditions of inert-gas implantation, was not observed in the ODS alloy irradiated even to the highest dose (12000 at.ppm Ne). The reason is ascribed to the enhanced recom-bination of point defects and strong trapping of Ne atoms at the interfaces of the nano-scale oxide par-ticles in grains. The study showed that ODS alloys have good resistance to the high-temperature in-ter-granular embrittlement due to inert-gas accumulation, exhibiting prominence of application in harsh situations of considerable helium production at elevated temperatures like in a fusion reactor.