| Budget Amount *help |
¥16,900,000 (Direct Cost: ¥13,000,000、Indirect Cost: ¥3,900,000)
Fiscal Year 2018: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2017: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2016: ¥7,020,000 (Direct Cost: ¥5,400,000、Indirect Cost: ¥1,620,000)
|
|---|
| Outline of Final Research Achievements |
We have investigated effects of various factors on variant structure of martensite and bainite in ferrous alloys. We found that strong variant selection occurs in the nucleation of bainite at austenite grain boundary, which cause the formation of coarse grain boundary structure especially for in low carbon steel. Increase in carbon content, self-accommodation is enhanced and the formation of coarse grain boundary bainite structure is suppressed.
On the other hand, thickness and length of martensite are reduced at higher carbon content. Block length is decreased at smaller austenite grain size while effects of austenite grain size on block thickness is small.
|
