Small Specimen Design and Validation for Mechanical Property Evaluation of Aircraft Engine Parts

Hakmin Lee; Donghoon Yoo; Hyeonsu Jang; Hyun-Sun Choi; Bo-Hee Kim; Dong-Yeop Lee; Ki-Deuk Min

doi:10.3740/MRSK.2025.35.9.418

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2025 Vol.35, Issue 9 Preview Page Next Page

Research Paper

Small Specimen Design and Validation for Mechanical Property Evaluation of Aircraft Engine Parts 항공엔진 부품 기계적 특성평가를 위한 소형시편 설계 및 검증

27 September 2025. pp. 418-427

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Abstract

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.

Keywords

17-4PH

small specimen

tensile test

creep rupture test

voce equation

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Information

Publisher :Materials Research Society of Korea
Publisher(Ko) :한국재료학회
Journal Title :Korean Journal of Materials Research
Journal Title(Ko) :한국재료학회지
Volume : 35
No :9
Pages :418-427
Received Date : 2025-08-13
Revised Date : 2025-09-02
Accepted Date : 2025-09-03
DOI :https://doi.org/10.3740/MRSK.2025.35.9.418

Korean Journal of Materials Research ISSN:1225-0562(Print) 2287-7258(Online) 한국재료학회지

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