고온 재질 열화도를 반영한 CrMoV 터빈로터의 재료 위험도 및 잔여수명 평가Assessment of Material Risk and Residual Life of CrMoV Turbine Rotor Considering High Temperature Material Degradation
- Authors
- 마영화; 이진상; 윤기봉
- Issue Date
- 2006
- Publisher
- 한국안전학회
- Keywords
- material degradation; DBTT; fracture toughness; ageing; CrMoV steel
- Citation
- 한국안전학회지, v.21, no.4, pp 33 - 41
- Pages
- 9
- Journal Title
- 한국안전학회지
- Volume
- 21
- Number
- 4
- Start Page
- 33
- End Page
- 41
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/28914
- ISSN
- 1738-3803
- Abstract
- Material degradation should be considered to assess integrity and residual life of high temperature equipments. However, the property data reflecting degradation are not sufficient for practical use. In this study measuring properties for 1Cr-1Mo-0.25V forging steel generally used for turbine rotor was carried out. Degradation was simulated by isothermal ageing heat treatment and variation of microstructure was observed. Mechanical properties such as tensile strength, impact energy, hardness and fracture toughness were measured. Assuming a semi-elliptical surface crack at the bore hole in a turbine rotor, material risk was estimated by using the aged material property data obtained in this study. Safety margin was decreased and life of the rotor was exhausted. This procedure can be used in assessing the residual life of a turbine rotor due to material degradation.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > School of Mechanical Engineering > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/28914)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.