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Toughness degradation evaluation of low alloyed steels by electrical resistivity

Abstract

Remaining life of turbine rotors with a crack can be assessed by the fracture toughness on 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. (author). 13 refs, 7 figs.
Authors:
Nahm, S H; Yu, K M; Kim, S C; [1]  Kim, A [2] 
  1. Korea Research Inst. of Standards and Science, Taejon (Korea, Republic of)
  2. Department of Mechanical Engineering, Kongju Univ., Kongju, Chungnam (Korea, Republic of)
Publication Date:
Sep 01, 1997
Product Type:
Conference
Report Number:
IWG-LMNPP-96/1; CONF-9705163-
Reference Number:
SCA: 220200; PA: AIX-28:059463; EDB-97:116706; SN: 97001844457
Resource Relation:
Conference: IAEA specialists` meeting on methodology for pressurized thermal shock evaluation, Esztergom (Hungary), 5-8 May 1997; Other Information: PBD: 1997; Related Information: Is Part Of Methodology for pressurized thermal shock evaluation. Proceedings of the IAEA specialists meeting. Working material; PB: 457 p.
Subject:
22 NUCLEAR REACTOR TECHNOLOGY; LOW ALLOY STEELS; FRACTURE PROPERTIES; SERVICE LIFE; AGING; ELECTRIC CONDUCTIVITY; EVALUATION; ROTORS
OSTI ID:
519619
Research Organizations:
International Atomic Energy Agency, Vienna (Austria). International Working Group on Life Management of Nuclear Power Plants
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
Other: ON: DE97640092; TRN: XA9744642059463
Availability:
INIS; OSTI as DE97640092
Submitting Site:
INIS
Size:
pp. 291-301
Announcement Date:

Citation Formats

Nahm, S H, Yu, K M, Kim, S C, and Kim, A. Toughness degradation evaluation of low alloyed steels by electrical resistivity. IAEA: N. p., 1997. Web.
Nahm, S H, Yu, K M, Kim, S C, & Kim, A. Toughness degradation evaluation of low alloyed steels by electrical resistivity. IAEA.
Nahm, S H, Yu, K M, Kim, S C, and Kim, A. 1997. "Toughness degradation evaluation of low alloyed steels by electrical resistivity." IAEA.
@misc{etde_519619,
title = {Toughness degradation evaluation of low alloyed steels by electrical resistivity}
author = {Nahm, S H, Yu, K M, Kim, S C, and Kim, A}
abstractNote = {Remaining life of turbine rotors with a crack can be assessed by the fracture toughness on 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. (author). 13 refs, 7 figs.}
place = {IAEA}
year = {1997}
month = {Sep}
}