Compressive creep behavior of an electric brush-plated nanocrystalline Cu at room temperature

AbstractThe creep behavior of a commercial grade polycarbonate was investigated in this study. 10 different constant stresses ranging from 8 MPa to 50 MPa were applied to the specimen, and the resultant creep strains were measured at room temperature. It was found that the creep could be modeled linearly below 15 MPa, and nonlinearly above 15 MPa. Different nonlinear viscoelastic models have been briefly reviewed and used to fit the test data. It is shown that the Findley model is a special case of the Schapery model, and both the Findley model and the simplified multiple integral representation are suitable for properly describing the creep behavior of the polycarbonate investigated in this paper; however, the Findley model fit the data better than the simplified multiple integral with three terms.

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Effect of hydrogen on creep behavior of Ti-6AI-4V alloy at room temperature

Metallurgical Transactions A ◽

10.1007/bf03325723 ◽

1991 ◽

Vol 18 (6) ◽

pp. 1125-1130 ◽

Cited By ~ 1

Author(s):

G. Y. Gao ◽

S. C. Dexter

Keyword(s):

Creep Behavior ◽

Room Temperature

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Tensile and Compressive Creep Behavior of IN718 Alloy Manufactured by Selective Laser Melting

Materials Science Forum ◽

10.4028/www.scientific.net/msf.986.102 ◽

2020 ◽

Vol 986 ◽

pp. 102-108 ◽

Cited By ~ 1

Author(s):

Zhen Xu ◽

Chuan Guo ◽

Zhen Rong Yu ◽

Xin Li ◽

Xiao Gang Hu ◽

...

Keyword(s):

Creep Behavior ◽

Chemical Potential ◽

Creep Process ◽

Tension Stress ◽

Creep Tests ◽

Compressive Creep ◽

Large Size ◽

Stress Orientation ◽

Evolution Of Microstructure ◽

Tension Compression Asymmetry

Tensile and compressive creep behavior of SLMed IN718 alloy under 973K (700°C) were investigated. Crept samples were analyzed by SEM and TEM to expose evolution of microstructure, precipitates and dislocation structure during the creep process. Results show that initial creep rate under compression is higher than under tension for the same creep conditions. Minimum creep rates are approximately the same both in tensile and compressive creep tests. The different creep behaviors may be related to the fact that tension stress promotes precipitations of fine needle-like γ′′ phases, while compression stress promotes precipitations of large size δ phases. The tension-compression asymmetry owns to the increment of chemical potential varying with the stress orientation.

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Compressive Creep Measurements of Fired Magnesia Bricks at Elevated Temperatures Including Creep Law Parameter Identification and Evaluation by Finite Element Analysis

Ceramics ◽

10.3390/ceramics3020019 ◽

2020 ◽

Vol 3 (2) ◽

pp. 210-222 ◽

Cited By ~ 1

Author(s):

Guenter Unterreiter ◽

Daniel R. Kreuzer ◽

Bernd Lorenzoni ◽

Hans U. Marschall ◽

Christoph Wagner ◽

...

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Creep Behavior ◽

Elevated Temperatures ◽

Cell Model ◽

Experimental Investigations ◽

Load Range ◽

Element Analysis ◽

Compressive Creep ◽

Creep Deformations

Creep behavior is very important for the selection of refractory materials. This paper presents a methodology to measure the compressive creep behavior of fired magnesia materials at elevated temperatures. The measurements were carried out at 1150–1500 °C and under compression loads from 1–8 MPa. Creep strain was calculated from the measured total strain data. The obtained creep deformations of the experimental investigations were subjected to detailed analysis to identify the Norton-Bailey creep law parameters. The modulus of elasticity was determined in advance to simplify the inverse estimation process for finding the Norton-Bailey creep parameters. In the next step; an extended material model including creep was used in a finite element analysis (FEA) and the creep testing procedure was reproduced numerically. Within the investigated temperature and load range; the creep deformations calculated by FEA demonstrated a good agreement with the results of the experimental investigations. Finally; a finite element unit cell model of a quarter brick representing a section of the lining of a ferrochrome (FeCr) electric arc furnace (direct current) was used to assess the thermo-mechanical stresses and strains including creep during a heat-up procedure. The implementation of the creep behavior into the design process led to an improved prediction of strains and stresses.

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