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Creep of OFHC and silver copper at simulated final repository canister-service conditions

Technical Report:

Abstract

Result of high-resolution creep rate measurements are described for estimating very long term creep life of copper and silver alloyed copper at room temperature and at stresses approaching the expected service conditions of final repository canisters. The aim was to assess the limiting service stress levels for potential canister wall materials. The 0.1 % silver alloyed copper showed minimum creep rates of 10{sup -}9 to 10{sup -}10 l/h, corresponding to 1 % strain in about 1000 to 10000 years, at room temperature and uniaxial stress level of 50 to 75 MPa. The predicted time to 1 % strain, when extrapolated from literature data, was at least one order of magnitude shorter. From the results of the present work, the 1 % creep life for OFHC copper was at most a few hundreds of years at 50 MPa stress level. The technique developed and used in this work for measuring very low strain rates appears useful for assessing low temperature creep life of practical structures essentially without accelerating the test from the service conditions.
Authors:
Auerkari, P; Leinonen, H.; Sandlin, S [1] 
  1. Valtion Teknillinen Tutkimuskeskus, Espoo (Finland). Metallilaboratorio
Publication Date:
Jul 01, 1991
Product Type:
Technical Report
Report Number:
YJT-91-16
Reference Number:
SCA: 052002; 420500; PA: AIX-23:009073; SN: 92000619800
Resource Relation:
Other Information: PBD: Jul 1991
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 42 ENGINEERING; UNDERGROUND DISPOSAL; MATERIALS TESTING; COPPER ALLOYS; RADIOACTIVE WASTE DISPOSAL; SILVER ADDITIONS; SIMULATION; STRAINS; STRESSES; 052002; 420500; WASTE DISPOSAL AND STORAGE
OSTI ID:
10104148
Research Organizations:
Voimayhtioeiden Ydinjaetetoimikunta, Helsinki (Finland)
Country of Origin:
Finland
Language:
English
Other Identifying Numbers:
Other: ON: DE92612985; TRN: FI9100115009073
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
FIN
Size:
32 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Auerkari, P, Leinonen, H., and Sandlin, S. Creep of OFHC and silver copper at simulated final repository canister-service conditions. Finland: N. p., 1991. Web.
Auerkari, P, Leinonen, H., & Sandlin, S. Creep of OFHC and silver copper at simulated final repository canister-service conditions. Finland.
Auerkari, P, Leinonen, H., and Sandlin, S. 1991. "Creep of OFHC and silver copper at simulated final repository canister-service conditions." Finland.
@misc{etde_10104148,
title = {Creep of OFHC and silver copper at simulated final repository canister-service conditions}
author = {Auerkari, P, Leinonen, H., and Sandlin, S}
abstractNote = {Result of high-resolution creep rate measurements are described for estimating very long term creep life of copper and silver alloyed copper at room temperature and at stresses approaching the expected service conditions of final repository canisters. The aim was to assess the limiting service stress levels for potential canister wall materials. The 0.1 % silver alloyed copper showed minimum creep rates of 10{sup -}9 to 10{sup -}10 l/h, corresponding to 1 % strain in about 1000 to 10000 years, at room temperature and uniaxial stress level of 50 to 75 MPa. The predicted time to 1 % strain, when extrapolated from literature data, was at least one order of magnitude shorter. From the results of the present work, the 1 % creep life for OFHC copper was at most a few hundreds of years at 50 MPa stress level. The technique developed and used in this work for measuring very low strain rates appears useful for assessing low temperature creep life of practical structures essentially without accelerating the test from the service conditions.}
place = {Finland}
year = {1991}
month = {Jul}
}