U.S. Department of EnergyOffice of Scientific and Technical Information
Effects of thermal aging and neutron irradiation on the mechanical properties of stainless steel weld overlay cladding
Abstract
Stainless steel weld overlay cladding was fabricated using the three-wire, series-arc method. Three layers of cladding were applied to a pressure vessel plate to provide adequate thickness for fabrication of test specimens. Since irradiation of the stainless steel cladding to 5 {times} 10{sup 19} neutrons/cm{sup 2} (>1 MeV) was conducted at 288{degrees}C for 1605 h, tensile, Charpy V-notch (CVN), precracked Charpy V-notch (PCVN), and compact fracture toughness specimens were thermally aged at 288{degrees}C for 1605 h. Additional specimens are being aged to 20,000 and 50,000 h. Thermal aging of three-wire, series-arc stainless steel weld overlay cladding at 288{degrees}C for 1604 h resulted in appreciable decrease (16%) in the CVN upper-shelf energy, but the effect on the 41-J transition temperature shift was very small (3{degrees}C). The combined effect, following neutron irradiation at 288{degrees}C to a fluence of 5 {times} 10{sup 19} neutrons/cm{sup 2} (>MeV), was a 22% reduction in the CVN upper-shelf energy and a 29{degrees}C shift at the 41-J level. The effect of thermal aging on tensile properties was very small or negligible. However, the combined effect after neutron irradiation was an increase in the yield strength (6 to 34% at test temperatures from 288 to {minus}125{degrees}C) and no apparentmore »
- Authors:
- Publication Date:
- Research Org.:
- Oak Ridge National Lab., TN (United States)
- Sponsoring Org.:
- Nuclear Regulatory Commission, Washington, DC (United States)
- OSTI Identifier:
- 10105623
- Report Number(s):
- CONF-910808-7
ON: DE92004443
- DOE Contract Number:
- AC05-84OR21400
- Resource Type:
- Conference
- Resource Relation:
- Conference: 5. international symposium on environmental degradation of materials in nuclear power systems - water reactors,Monterey, CA (United States),25-29 Aug 1991; Other Information: PBD: [1991]
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 22 GENERAL STUDIES OF NUCLEAR REACTORS; 36 MATERIALS SCIENCE; STAINLESS STEEL-308; AGING; PHYSICAL RADIATION EFFECTS; WELDED JOINTS; NEUTRONS; FRACTURE PROPERTIES; TENSILE PROPERTIES; ULTIMATE STRENGTH; ELONGATION; PRESSURE VESSELS; 220200; 360106; 360103; COMPONENTS AND ACCESSORIES; RADIATION EFFECTS; MECHANICAL PROPERTIES
Citation Formats
Haggag, F M, and Nanstad, R K. Effects of thermal aging and neutron irradiation on the mechanical properties of stainless steel weld overlay cladding. United States: N. p., 1991.
Web.
Haggag, F M, & Nanstad, R K. Effects of thermal aging and neutron irradiation on the mechanical properties of stainless steel weld overlay cladding. United States.
Haggag, F M, and Nanstad, R K. 1991.
"Effects of thermal aging and neutron irradiation on the mechanical properties of stainless steel weld overlay cladding". United States.
@article{osti_10105623,
title = {Effects of thermal aging and neutron irradiation on the mechanical properties of stainless steel weld overlay cladding},
author = {Haggag, F M and Nanstad, R K},
abstractNote = {Stainless steel weld overlay cladding was fabricated using the three-wire, series-arc method. Three layers of cladding were applied to a pressure vessel plate to provide adequate thickness for fabrication of test specimens. Since irradiation of the stainless steel cladding to 5 {times} 10{sup 19} neutrons/cm{sup 2} (>1 MeV) was conducted at 288{degrees}C for 1605 h, tensile, Charpy V-notch (CVN), precracked Charpy V-notch (PCVN), and compact fracture toughness specimens were thermally aged at 288{degrees}C for 1605 h. Additional specimens are being aged to 20,000 and 50,000 h. Thermal aging of three-wire, series-arc stainless steel weld overlay cladding at 288{degrees}C for 1604 h resulted in appreciable decrease (16%) in the CVN upper-shelf energy, but the effect on the 41-J transition temperature shift was very small (3{degrees}C). The combined effect, following neutron irradiation at 288{degrees}C to a fluence of 5 {times} 10{sup 19} neutrons/cm{sup 2} (>MeV), was a 22% reduction in the CVN upper-shelf energy and a 29{degrees}C shift at the 41-J level. The effect of thermal aging on tensile properties was very small or negligible. However, the combined effect after neutron irradiation was an increase in the yield strength (6 to 34% at test temperatures from 288 to {minus}125{degrees}C) and no apparent change in ultimate strength and total elongation. Also, neutron irradiation reduced the initiation fracture toughness (J{sub Ic}) much more than did thermal aging. However, irradiation slightly decreased the tearing modulus, but no reduction was caused by thermal aging alone. The effects of long-term thermal exposure times (20,000 and 50,000 h) will be investigated when the specimen become available.},
doi = {},
url = {https://www.osti.gov/biblio/10105623},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Dec 31 00:00:00 EST 1991},
month = {Tue Dec 31 00:00:00 EST 1991}
}