표제지
목차
국문요약 12
Abstract 13
1. 서론 14
2. 이론적 배경 17
2.1. 이원계 Al-Mg 합금 17
2.2. 강소성 가공법 17
2.3. 집합 조직 18
2.4. X-ray diffraction line profile analysis (XLPA) 19
3. 실험방법 20
3.1. 재료 및 준비 과정 20
3.2. EBSD와 XLPA 분석 21
3.3. 기계적 특성 측정 22
4. 실험 결과 25
4.1. 미세조직 25
4.2. 전위 거동 29
4.3. 기계적 특성 및 이방성 32
4.4. 집합 조직 37
5. 고찰 44
5.1. MAC 효과 44
5.2. 어닐링 효과 46
5.3. Mg 함량 효과 49
6. 결론 50
7. 참고문헌 51
Table. 4-1. Texture components for rolled FCC metals. 40
Fig. 3-1. The schematic illustration of (a) the multi-axial compression (MAC) process and (b) sampling mode for EBSD and XRD observations. 24
Fig. 4-1. Grain orientation spread (GOS) maps of deformed and annealed Al-6Mg ((a)-0 min, (b)-10 min, (c)-30 min, (d)-60 min, (e)-90 min) and... 27
Fig. 4-2. Grain size distribution of deformed and annealed Al-6Mg ((a)-0 min, (b)-10 min, (c)-30 min, (d)-60 min, (e)-90 min) and Al-8Mg... 28
Fig. 4-3. Evolutions of CMWP-measured total dislocation density, EBSD-measured GND density and SSD density (as measured by their... 31
Fig. 4-4. (a) Vickers hardness of deformed and annealed Al-6Mg and Al-8Mg alloys. (b) Optical microscope images of indentation applied to... 35
Fig. 4-5. Engineering strain-stress curves of deformed and annealed for 90 minutes (a) Al-6Mg and (b) Al-8Mg alloys. (c) Formability (average r... 36
Fig. 4-6. (a) Orientation distribution functions and (b) pole figure of deformed and annealed for 90 minutes Al-Mg alloys. 41
Fig. 4-7. Area fraction of grains with ideal FCC texture in deformed and annealed (a) Al-6Mg and (b) Al-8Mg alloys. 42
Fig. 4-8. (a), (b) Misorientation distribution of HAGB in an ideal random state and deformed and annealed Al-Mg alloys. (c) Texture index of... 43
Fig. 5-1. Inverse pole figure (IPF) and IPF maps in final compression direction (FD) of deformed and annealed for 90 minutes Al-Mg alloys... 48