Evaluation of Toughness Degradation of 1Cr-1Mo-0.25V Steel by Electrical Resistivity
Creators
- 1. Korea Research Institute of Standards and Science, Daejeon (Korea, Republic of)
- 2. Kongju National University, Gongju (Korea, Republic of)
Description
Remaining life of turbine rotors with a crack can be assessed by the fracture toughness of the aged rotors at service temperature. DC potential drop measurement system was constructed in order to evaluate material toughness nondestructively. Test material was 1Cr-1Mo-0.25V steel used widely for turbine rotor material. Seven kinds of specimen with different degradation levels were prepared according to isothermal aging heat treatment at 630 .deg. C . Electrical resistivity of test material was measured at room temperature. It was observed that material toughness and electrical resistivity decreased with the increase of degradation. The relationship between fracture toughness and electrical resistivity was investigated. Fracture toughness of a test material may be determined nondestructively by electrical resistivity
Additional details
Publishing Information
- Journal Title
- Journal of the Korean Society for Nondestructive Testing
- Journal Volume
- 18
- Journal Issue
- 1
- Series
- 12 refs, 7 figs, 4 tabs
- Journal Page Range
- p. 10-16
- ISSN
- 1225-7842
INIS
- Country of Publication
- Korea, Republic of
- Country of Input or Organization
- Korea, Republic of
- INIS RN
- 42102603
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- CHROMIUM STEELS; ELECTRIC CONDUCTIVITY; FRACTURE PROPERTIES; HEAT TREATMENTS; ISOTHERMS; ROTORS
- Descriptors DEC
- ALLOYS; CARBON ADDITIONS; CHROMIUM ALLOYS; ELECTRICAL PROPERTIES; HIGH ALLOY STEELS; IRON ALLOYS; IRON BASE ALLOYS; MECHANICAL PROPERTIES; PHYSICAL PROPERTIES; STAINLESS STEELS; STEELS; TRANSITION ELEMENT ALLOYS