Quantitative evaluation of microstructural conditions of high Cr steels based on calorimetry

2016 Fiscal Year Final Research Report

• Project/Area Number: 26420726
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Structural/Functional materials
• Research Institution: Kyushu Institute of Technology
• Principal Investigator: Tokunaga Tatsuya 九州工業大学, 大学院工学研究院, 准教授 (40457453)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 熱量測定 / 耐熱鋼 / 転位密度 / 溶接熱影響部

Outline of Final Research Achievements

DSC measurements indicated that the change of heat content in 9%Cr ferritic heat-resistant steels reflected various microstructural conditions, and thus, it was found that there is a relationship between the change of heat content and the elastic strain energy stored in the materials. The Cr content in the ferritic matrix of the simulated heat affected zone was estimated based on the change in magnetic transformation temperatures. These results suggested the possibility of evaluation of microstructural conditions in high Cr ferritic heat-resistant steels based on macroscopic data obtained from calorimetry.

Free Research Field

材料組織学