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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학위논문
- 저자정보
- 지도교수
- 김인수
- 발행연도
- 2013
- 저작권
- 금오공과대학교 논문은 저작권에 의해 보호받습니다.
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이 논문의 연구 히스토리 (4)
2014
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초록· 키워드
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Al alloy is one of the light weight materials. But Al alloy sheets are not good deep drawability. It needs to increase deep drawability to decrease vehicle weight to decrease environmental pollution from carbon dioxide production.
In this study, changes of texture and plastic strain ratio were investigated after two-steps asymmetric rolling and heat-treatment process of AA1050 Al alloy sheet. The first, AA1050 Al alloy sheet was 60% and 80% asymmetrically rolled and heat-treated, respectively. The second, 60% and 80% asymmetrically rolled and heat-treated Al alloy sheets were 10?25% asymmetrically rolled and heat-treated, respectively. Calculated and measured plastic strain ratio were compared each other.
The calculated and measured average plastic strain ratios were shown the highest values after the second 15?20% asymmetric rolling and heat treatment of AA1050 Al sheet. Because, after the second 15?20% asymmetric rolling and heat treatment of AA1050 Al sheet, the rot-CND, {001}<110> texture component was reduced, γ-fiber, {111} // ND texture component was increased.
After the first 60 and 80% asymmetrically rolled and heat-treated then the second 15 and 20% asymmetrically rolled and heat-treated sheet, measured average plastic strain ratios were 1.6 and 1.5 times higher than initial samples, respectively.
After the first 60 and 80% asymmetrically rolled and heat-treated then the second 15 and 20% asymmetrically rolled and heat-treated sheet, measured values were 1/15 and 1/6 times lower than initial samples, respectively. This results were able to be explained by Taylor factor theory.
In this study, changes of texture and plastic strain ratio were investigated after two-steps asymmetric rolling and heat-treatment process of AA1050 Al alloy sheet. The first, AA1050 Al alloy sheet was 60% and 80% asymmetrically rolled and heat-treated, respectively. The second, 60% and 80% asymmetrically rolled and heat-treated Al alloy sheets were 10?25% asymmetrically rolled and heat-treated, respectively. Calculated and measured plastic strain ratio were compared each other.
The calculated and measured average plastic strain ratios were shown the highest values after the second 15?20% asymmetric rolling and heat treatment of AA1050 Al sheet. Because, after the second 15?20% asymmetric rolling and heat treatment of AA1050 Al sheet, the rot-CND, {001}<110> texture component was reduced, γ-fiber, {111} // ND texture component was increased.
After the first 60 and 80% asymmetrically rolled and heat-treated then the second 15 and 20% asymmetrically rolled and heat-treated sheet, measured average plastic strain ratios were 1.6 and 1.5 times higher than initial samples, respectively.
After the first 60 and 80% asymmetrically rolled and heat-treated then the second 15 and 20% asymmetrically rolled and heat-treated sheet, measured values were 1/15 and 1/6 times lower than initial samples, respectively. This results were able to be explained by Taylor factor theory.
목차
제 1 장 서 론 1제 2 장 이론적 배경 42.1 알루미늄의 일반적인 성질 42.2 비대칭 압연 62.3 집합조직의 표현 82.4 집합조직의 측정 122.5 FCC결정구조 금속의 집합조직 162.6 금속판재의 성형성 182.7 Taylor factor 21제 3 장 실험 방법 233.1 시편 준비 233.2 비대칭 압연 243.3 열처리 263.4 집합조직의 측정 263.5 EBSD 측정 263.6 소성변형비(R-value) 측정 28제 4 장 실험 결과 314.1 집합조직 분석 314.2 소성변형비(R-value) 분석 494.3 EBSD 분석 59제 5 장 결 론 64[참고 문헌] 65
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