Degradation Evaluation of Aged 1Cr-1Mo-0.25V Steel Using Coercive Force
- 1. Korea Research Institute of Standards and Science, Daejeon (Korea, Republic of)
- 2. Hannam University, Daejeon (Korea, Republic of)
Description
The integrity of the turbine rotors can be assessed by the coercive force and Vickers hardness of the aged rotors at service temperature. The coercive force measurement system was constructed in order to evaluate material degradation nondestructively. The test specimen was 1Cr-1Mo-0.25V steel used widely for turbine rotor material, and then the seven kinds of specimens with different degradation levels were prepared by the isothermal heat treatment at 630 .deg. C. The coercive force of the test materials was measured at room temperature. Vickers hardness and coercive force decreased with the increase of degradation. The relationship between Vickers hardness and coercive force was investigated. The degradation of test material may be determined nondestructively by the relationship between Vickers hardness and coercive force
Additional details
Publishing Information
- Journal Title
- Journal of the Korean Society for Nondestructive Testing
- Journal Volume
- 19
- Journal Issue
- 4
- Series
- 10 refs, 8 figs, 3 tabs
- Journal Page Range
- p. 288-293
- ISSN
- 1225-7842
INIS
- Country of Publication
- Korea, Republic of
- Country of Input or Organization
- Korea, Republic of
- INIS RN
- 42102595
- Subject category
- S42: ENGINEERING; S36: MATERIALS SCIENCE;
- Descriptors DEI
- CHROMIUM STEELS; COERCIVE FORCE; HEAT TREATMENTS; MATERIALS TESTING; ROTORS; THERMAL DEGRADATION; VICKERS HARDNESS
- Descriptors DEC
- ALLOYS; CARBON ADDITIONS; CHROMIUM ALLOYS; HIGH ALLOY STEELS; IRON ALLOYS; IRON BASE ALLOYS; STAINLESS STEELS; STEELS; TESTING; TRANSITION ELEMENT ALLOYS