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304 스테인리스강의 열간동적재결정과 미세조적 예측에 대한 연구
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | 권영표 | - |
| dc.date.accessioned | 2017-02-22T02:13:23Z | - |
| dc.date.available | 2017-02-22T02:13:23Z | - |
| dc.date.issued | 2001 | - |
| dc.date.submitted | 2005-10-19 | - |
| dc.identifier.uri | http://kmou.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000002173720 | ko_KR |
| dc.identifier.uri | http://repository.kmou.ac.kr/handle/2014.oak/8068 | - |
| dc.description.abstract | The flow stresses of 304 stainless steel during hot forming process were determined by conducting hot compression tests at the range of 1273 K ∼ 1423 K and 0.05 /s ∼ 2.0 /s as these are typical temperature and strain rate in hot forging operation. In the material Dynamic recrystallization was found to be the major softening mechanism with this conditions as previous studies. Based on the observed phenomena, a constitutive model of flow stress was assumed as a function of strain, strain rate, temperature. In the constitutive model, the effects of strain hardening and dynamic recrystallization were taken into consideration. A finite element method connected to constitutive model was performed to predict the dynamic recrystallization behaviors and also stress-strain curves in hot compression of 304 stainless steel. | - |
| dc.description.tableofcontents | ABSTRACT = ⅰ 기호설명 = ⅲ List of Tables and Photographs = ⅴ List of Figures = ⅵ 1. 서론 = 1 1.1 연구 배경 = 1 1.2 연구 동향 = 2 1.3 연구 목적 = 3 2. 열간가공시 재료의 미세조직 변화 = 4 2.1 동적회복 = 5 2.2 동적재결정 = 5 2.3 정적재결정 = 6 2.4 입자성장 = 6 Figures = 8 3. 강점소성 유한요소법 = 10 3.1 강점소성 유한요소법의 변분 방정식 = 10 3.2 열전달방정식의 유한요소방정식 수식화 = 11 4. 실험과 시뮬레이션 = 13 4.1 기초실험 = 13 4.2 등속·등온 압축실험 = 14 4.3 시뮬레이션 = 14 Tables = 16 Photos and Figures = 17 5. 결과 및 고찰 = 24 5.1 고온유동곡선 모델링 = 24 5.1.1 구성식의 정량화 = 24 5.1.2 유동응력곡선 모델링 = 27 5.2 등온·등속 압축실험결과와 시뮬레이션 결과의 고찰 = 31 Photos and Figures = 34 6. 결론 = 48 참고문헌 = 50 | - |
| dc.publisher | 한국해양대학교 대학원 | - |
| dc.title | 304 스테인리스강의 열간동적재결정과 미세조적 예측에 대한 연구 | - |
| dc.title.alternative | (The) Prediction of Dynamic Recry stallization and Grain Size of 34 Stainless Steel during Hot Deformation | - |
| dc.type | Thesis | - |
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