| 학회 |
한국재료학회 |
| 학술대회 |
2016년 봄 (05/18 ~ 05/20, 여수 디오션리조트 ) |
| 권호 |
22권 1호 |
| 발표분야 |
D. 구조 재료 분과 |
| 제목 |
Interpretation of macroscopic mechanical properties in Fe-Nb-B composite alloys utilizing systematic nano-scale analysis |
| 초록 |
The ultrafine eutectic - primary dendrite composites have high yield strength as well as large plasticity. Recently, the addition of minor element leads to change the mechanical properties due to heterogeneities in length-scale of the microstructure. In the present study, the microstructural evolution and change of mechanical properties are investigated as increasing boron contents into Fe-Nb binary eutectic alloy. With addition of Boron from 0 at.% to 10 at.%, the lamellar eutectic structure drastically changes into a composite-type structure which consists of primary dendrites and a eutectic. Furthermore, it is found that the pseudo-peritectic structure is observed with increase of Boron. Ultimately, the whole matrix is formed by pseudo-peritectic microstructure. Further increase Boron contents from 10 at.% to 20 at.%, the volume fractions of pseudo-peritectic structure decrease. Moreover, the matrix structure is dramatically changed. According to change of microstructure, the plastic strain was decreased with increase of yield strength from ~1.5Gpa to ~3Gpa by B addition. To understand deformation behavior, fracture and lateral surface analysis are performed by Scanning Electron Microscopy and Atomic force microscopy. |
| 저자 |
김정태1, 홍성환1, 박혜진1, 김영석1, 서진유2, 박진만3, 김기범1
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| 소속 |
1세종대, 2한국과학기술(연), 3삼성전자 |
| 키워드 |
Fe-based alloy; mechanical properties; eutectic alloy; plastic deformation; nanoindentation
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| E-Mail |
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