TY - JOUR
T1 - Modeling creep and fatigue of copper alloys
AU - Li, G.
AU - Thomas, B. G.
AU - Stubbins, J. F.
N1 - Funding Information:
The authors acknowledge the support of McDonnell Douglas and the Continuous Casting Consortium, University of Illinois. Special thanks are also due to Peter Kurath, who performed the fatigue experiments, and to the National Center for Supercomputing Applications for providing computing time and the ABAQUS program.
PY - 2000
Y1 - 2000
N2 - This article reviews expressions to quantify the thermal creep and fatigue lifetime for four copper alloys: Cu-Ag-P, Cu-Cr-Zr, Cu-Ni-Be, and Cu-Al2O3. These property models are needed to simulate the mechanical behavior of structures with copper components, which are subjected to high heat-flux and fatigue loading conditions, such as molds for the continuous casting of steel and the first wall in a fusion reactor. Then, measurements of four-point bending fatigue tests were conducted on two-layered specimens of copper alloy and stainless steel, and thermal ratchetting behavior was observed at 250 °C. The test specimens were modeled with a two-dimensional elastic-plastic-creep finite-element model using the ABAQUS software. To match the measurements, a primary thermal-creep law was developed for Cu-0.28 pct Al2O3 for stress levels up to 500 MPa and strain rates from 10-8 to 10-2 s-1. Specifically, ε (s-1) = 1.43×1010 exp (-197,000/8.31 T(K)) (σ(MPa))2.5 (t(s))-0.9.
AB - This article reviews expressions to quantify the thermal creep and fatigue lifetime for four copper alloys: Cu-Ag-P, Cu-Cr-Zr, Cu-Ni-Be, and Cu-Al2O3. These property models are needed to simulate the mechanical behavior of structures with copper components, which are subjected to high heat-flux and fatigue loading conditions, such as molds for the continuous casting of steel and the first wall in a fusion reactor. Then, measurements of four-point bending fatigue tests were conducted on two-layered specimens of copper alloy and stainless steel, and thermal ratchetting behavior was observed at 250 °C. The test specimens were modeled with a two-dimensional elastic-plastic-creep finite-element model using the ABAQUS software. To match the measurements, a primary thermal-creep law was developed for Cu-0.28 pct Al2O3 for stress levels up to 500 MPa and strain rates from 10-8 to 10-2 s-1. Specifically, ε (s-1) = 1.43×1010 exp (-197,000/8.31 T(K)) (σ(MPa))2.5 (t(s))-0.9.
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U2 - 10.1007/s11661-000-0194-z
DO - 10.1007/s11661-000-0194-z
M3 - Article
AN - SCOPUS:0034292578
SN - 1073-5623
VL - 31
SP - 2491
EP - 2502
JO - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
JF - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
IS - 10
ER -