Theoretical clarification of dislocation bias factor

2015 Fiscal Year Final Research Report

• Project/Area Number: 24561044
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Nuclear engineering
• Research Institution: Japan Atomic Energy Agency
• Principal Investigator: Suzudo Tomoaki 国立研究開発法人日本原子力研究開発機構, システム計算科学センター, 研究主幹 (60414538)
• Co-Investigator(Kenkyū-buntansha): YAMAGUCHI Masatake 国立研究開発法人日本原子力研究開発機構, システム計算科学センター, 研究主幹 (50360417) ; TSURU Tomohito 国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門原子力基礎工学研究センター, 研究副主幹 (80455295)
• Project Period (FY): 2012-04-01 – 2016-03-31
• Keywords: 転位バイアス / 格子間原子の拡散 / 照射スウェリング

Outline of Final Research Achievements

Some materials swells under irradiation, and it is said that this phenomenon is caused by preferential absorption of interstitial atoms into dislocations; this is called dislocation bias. In previous studies, the dislocation bias is theoretically evaluated, but the value failed to reproduce the swelling ratio observed in experiments. The current project examined the cause of this discrepancy by employing a numerical model, which is more accurate than previous theoretical models. As a result, the discrepancy did not disappear even by more accurate analyses, and we become suspicious of the claim that the dislocation bias causes swelling.

Free Research Field

原子力材料モデリング