In-reactor stress relaxation of selected metals and alloys at low temperatures

In-situ Creep Testing Capability Development for Advanced Test Reactor

“…Moreover, thermal creep is negligible at 300°C for 1000 h. At 0.5 dpa, the strain relaxation ratio is about 40% ±10%. The results obtained on the pressurized tubes are in very good agreement with available published data, [62][63][64][65][66][67][68] mainly obtained on bent beams.…”

Void swelling and irradiation creep in light water reactor (LWR) environments

“…However, as the temperature decreased, the limited data in this set move not only toward higher nickel content but from fast reactor toward thermal reactor spectra, both of which would tend to underestimate the dpa level and artificially increase the creep coefficient as temperature decreased. This result has been cited several times as supporting an observed increase in the creep rate at relatively low temperatures [76,77].…”

Radiation-induced stress relaxation in high temperature water of type 316L stainless steel evaluated by neutron diffraction

“…Ishiyama et al [12] performed radiation-stress relaxation experiments for type 304 and type 316L stainless steels by the C-ring method and bent method at 561 K. They obtained A 3 coefficients having values of 0.6-1.8 (Â10 À6 /MPa/dpa). Causey et al [8] performed radiation-stress relaxation experiments for type 304 stainless steel by the bent method at 570 K. They obtained the A 3 coefficient as 1.1 (Â10 À6 /MPa/dpa). From these results, the A 3 coefficient of austenitic stainless steels is considered to be around 1.0 (Â10 À6 /MPa/dpa).…”

“…From these results, the A 3 coefficient of austenitic stainless steels is considered to be around 1.0 (Â10 À6 /MPa/dpa). Causey et al [8] also did radiation-stress relaxation experiments for nickel and Zircaloy-2 by the bent method at 570 K, and obtained A 3 coefficients of 8 (Â10 À6 /MPa/dpa) for nickel and 0.4 (Â10 À6 /MPa/dpa) for Zircaloy-2. These A 3 coefficients are summarized in Table 2.…”

“…Causey, alone [5,6] and with co-authors [7,8], has extensively investigated the stress relaxation and creep under fast neutron irradiation of austenitic stainless steels and other metals using the bent-beam method. Foster et al [9][10][11] have evaluated irradiation creep of austenitic stainless steels using bent beams and pressurized tubes to predict their stress relaxation behaviors from the obtained creep data.…”