Clarification of ultra low strain rate creep behavior and its microscopic mechanism of metal material

2014 Fiscal Year Final Research Report

• Project/Area Number: 24360292
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Structural/Functional materials
• Research Institution: Kyushu University
• Principal Investigator: NAKASHIMA Hideharu 九州大学, 総合理工学研究科(研究院), 教授 (80180280)
• Co-Investigator(Kenkyū-buntansha): HATA Satoshi 九州大学, 総合理工学研究院, 教授 (60264107) ; IKEDA Ken-ichi 北海道大学, 工学(系)研究科(研究院), 准教授 (20335996)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: クリープ / 耐熱金属材料 / 微細組織 / 電子顕微鏡 / 極低ひずみ速度

Outline of Final Research Achievements

An ultra-low strain rate time-dependent (creep) deformation causes the destruction of the heat-resistant material for the thermal power plant. In this study, we have established a method to measure and analyze it with high accuracy. We have also performed detailed microstructural observation using electron microscopes. By combining the two methods, it was revealed that the microstructural elements which act as a reinforcing factor in the steel changes under the ultra-low strain rate condition unlike that of the conventional experiment conditions.

Free Research Field

金属材料の高温変形