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Title: Fatigue-crack propagation behavior of wrought Alloy 600 and weld-deposited EN82H in an elevated temperature aqueous environment

Abstract

The fatigue-crack propagation (FCP) behavior of wrought Alloy 600 and weld-deposited Alloy EN82H was studied in an deaerated aqueous environment at 243 C. Stress corrosion cracking is not expected to be a major factor at this temperature. FCP rates in the EN82H were slightly higher (by a factor of less than two) than those in wrought Alloy 600 tested under similar conditions. two orientations of the crack relative to the direction of welding were tested for the EN82H: parallel to the direction of welding, and perpendicular to the direction of welding. No significant effect of crack orientation relative to the welding direction was observed. Stress ratio (R=K{sub min}/K{sub max}) effects were studied in wrought Alloy 600 at R=0.26, R=0.51, and R=0.71, and small increases in FCP rates were observed with increasing values of R. Most of the experiments were conducted at a cyclic frequency of 0.0167 Hz (sine), but limited testing was also done at a cyclic frequency of 0.002 Hz (sine). FCP rates were observed to increase with decreasing cyclic frequency. Electrochemical potential measurements were made on Alloy 600 FCP specimens in the test environment. The fracture surface morphologies for Alloy 600 and EN82H were characterized to determine operativemore » FCP mechanisms as a function of applied stress intensity factor.« less

Authors:
;  [1]
  1. Westinghouse Electric Corp., West Mifflin, PA (United States)
Publication Date:
OSTI Identifier:
131840
Report Number(s):
CONF-950740-
ISBN 0-7918-1334-7; TRN: IM9551%%448
DOE Contract Number:  
AC11-89PN38014
Resource Type:
Book
Resource Relation:
Conference: Joint American Society of Mechanical Engineers (ASME)/Japan Society of Mechanical Engineers (JSME) pressure vessels and piping conference, Honolulu, HI (United States), 23-27 Jul 1995; Other Information: PBD: 1995; Related Information: Is Part Of Service experience, structural integrity, severe accidents, and erosion in nuclear and fossil plants. PVP-Volume 303; Paterson, S.R.; Bamford, W.H; Geraets, L.H.; Okazaki, M.; Cipolla, R.C.; Cowfer, C.D.; Means, K.H. [eds.]; PB: 425 p.
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; INCONEL 600; FATIGUE; CRACK PROPAGATION; INCONEL 82; WELDED JOINTS; WATER CHEMISTRY; ELECTROCHEMICAL CORROSION; FRACTOGRAPHY; YIELD STRENGTH; ULTIMATE STRENGTH; ELONGATION; MICROSTRUCTURE; EXPERIMENTAL DATA

Citation Formats

James, L A, and Mills, W J. Fatigue-crack propagation behavior of wrought Alloy 600 and weld-deposited EN82H in an elevated temperature aqueous environment. United States: N. p., 1995. Web.
James, L A, & Mills, W J. Fatigue-crack propagation behavior of wrought Alloy 600 and weld-deposited EN82H in an elevated temperature aqueous environment. United States.
James, L A, and Mills, W J. Fri . "Fatigue-crack propagation behavior of wrought Alloy 600 and weld-deposited EN82H in an elevated temperature aqueous environment". United States.
@article{osti_131840,
title = {Fatigue-crack propagation behavior of wrought Alloy 600 and weld-deposited EN82H in an elevated temperature aqueous environment},
author = {James, L A and Mills, W J},
abstractNote = {The fatigue-crack propagation (FCP) behavior of wrought Alloy 600 and weld-deposited Alloy EN82H was studied in an deaerated aqueous environment at 243 C. Stress corrosion cracking is not expected to be a major factor at this temperature. FCP rates in the EN82H were slightly higher (by a factor of less than two) than those in wrought Alloy 600 tested under similar conditions. two orientations of the crack relative to the direction of welding were tested for the EN82H: parallel to the direction of welding, and perpendicular to the direction of welding. No significant effect of crack orientation relative to the welding direction was observed. Stress ratio (R=K{sub min}/K{sub max}) effects were studied in wrought Alloy 600 at R=0.26, R=0.51, and R=0.71, and small increases in FCP rates were observed with increasing values of R. Most of the experiments were conducted at a cyclic frequency of 0.0167 Hz (sine), but limited testing was also done at a cyclic frequency of 0.002 Hz (sine). FCP rates were observed to increase with decreasing cyclic frequency. Electrochemical potential measurements were made on Alloy 600 FCP specimens in the test environment. The fracture surface morphologies for Alloy 600 and EN82H were characterized to determine operative FCP mechanisms as a function of applied stress intensity factor.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {12}
}

Book:
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