논문 상세보기
pp.418-427
In situations where materials are rare difficult to obtain, the ability to test small specimens is becoming increasingly important, particularly for aerospace. In the nuclear power generation field, tensile and small punch testing of small specimens is being utilized to evaluate integrity. In this study, we designed and validated small specimens suitable for aircraft engine components. A fixture for small plate specimens was optimized using finite element analysis to ensure uniform stress distribution, and the specimens were manufactured through precision machining. Tensile tests and creep rupture tests were conducted, and the results were analyzed and compared with those from round specimens made from the same alloy. The yield strength and tensile strength of the small plate specimens were within 5 % of the round specimens, but there was less elongation compared to the round specimens. The difference in the decrease in elongation of the round specimens and small plate specimens was analyzed using the Voce equation to identify the cause. The approach used in this study enables the evaluation of the mechanical properties of engine components with limited material options or those in operation, and is expected to be utilized for monitoring the condition of critical components.
1. 서 론
2. 실험 방법
3. 결 과
3.1. 미세조직 분석
3.2. 인장시험
3.3. 크리프 파단 시험
4. 고 찰
4.1. 지그형상에 따른 응력분포 영향 분석
4.2. 시편형상에 따른 변형경화 특성
4.3. 가공방법에 따른 영향
5. 결 론
Acknowledgement
References
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