한국해양대학교

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잔류오스테나이트의 안정도에 따른 TRIP강의 고속인장 특성에 관한 연구

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dc.contributor.author 김동민 -
dc.date.accessioned 2017-02-22T06:55:21Z -
dc.date.available 2017-02-22T06:55:21Z -
dc.date.issued 2005 -
dc.date.submitted 56823-03-29 -
dc.identifier.uri http://kmou.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000002175736 ko_KR
dc.identifier.uri http://repository.kmou.ac.kr/handle/2014.oak/10022 -
dc.description.abstract The safety of passengers is very important during an automobile collision. Because the collision event involves high speed deformation, property data and deformation mechanisms of materials under high strain rate conditions are needed to choose proper materials for automobiles. Therefore, in this study, dynamic mechanical properties of low carbon TRIP steels with varying retained austenite stabilities were evaluated over a wide range of strain rates using a high-velocity hydraulic tensile testing machine. Tensile tests were performed at strain rates ranging from 10-2 to 6x102/sec using normal ASTM E-8 specimens with an elastic strain gage attached to the sample grip end to measure load and a plastic strain gage mounted on the gage section to measure strain precisely. Ultimate tensile strengths, strain rate sensitivities, and strain hardening behaviors are reported. The strength of TRIP steels increased with increasing strain rate, that is, positive strain rate sensitivity was observed. -
dc.description.tableofcontents 1. 서 론 1 2. 이론적 배경 3 2.1 TRIP(Transformation Induced Plasticity) 냉연강판 3 2.1.1 변태유기소성(TRIP) 현상 4 2.2 잔류오스테나이트 형성에 영향을 미치는 인자 8 2.2.1 합금원소의 영향 8 2.2.2 열처리 조건의 영향 9 2.3 잔류오스테나이트의 안정도 11 2.3.1 잔류오스테나이트 안정도에 미치는 합금원소의 영향 11 2.3.2 연성 향상에 기여하는 잔류오스테나이트 기구 12 2.4 고속인장시험 14 2.4.1 TRIP강의 고속인장특성 14 2.4.2 고속변형에서의 TRIP 냉연강판 21 3. 실 험 방 법 23 3.1 TRIP 냉연강판의 제조 23 3.2 이상영역 열처리 및 항온변태처리 24 3.3 고속인장시험 27 3.4 미세조직 관찰 30 3.5 잔류오스테나이트 부피분율 측정 30 4. 실험결과 및 고찰 32 4.1 미세조직 관찰 32 4.2 진응력 - 진변형률 곡선 36 4.3 Strain Rate Sensitivity 41 4.4 Elongation 43 4.5 Absorbed Energy 43 5. 결 론 49 참고문헌 51 Abstract 54 -
dc.language kor -
dc.publisher 한국해양대학교 대학원 -
dc.title 잔류오스테나이트의 안정도에 따른 TRIP강의 고속인장 특성에 관한 연구 -
dc.title.alternative The Effect of Retained Austenite Stability on High Speed Deformation Behavior of TRIP Steels -
dc.type Thesis -
dc.date.awarded 2005-02 -
dc.contributor.alternativeName Dong-Min Kim -
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재료공학과 > Thesis
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