منابع مشابه
Analysis on Pseudo-steady Indentation Creep
Theoretical analysis and finite element (FE) simulation have been carried out for a constant specific load rate (CSLR) indentation creep test. Analytical results indicate that both the representative stress and the indentation strain rate become constant after a transient period. Moreover, the FE simulation reveals that both the contours of equivalent stress and equivalent plastic strain rate u...
متن کاملIndentation creep studies of iron aluminide intermetallic alloy
Indentation creep behaviour of iron aluminide intermetallic (Fe–28Al–3Cr) was studied in the temperature range of 843–963 K. The hardness and the plasticity parameter were also calculated from room temperature to 1273 K. The variation of hardness with time showed that the stress exponent ðnÞ was weakly dependent on temperature. Thermal activation parameter-activation area and energy were also c...
متن کاملExperimental and computational creep characterization of Al–Mg solid-solution alloy through instrumented indentation
Carefully designed indentation creep experiments and detailed finite-element computations were carried out in order to establish a robust and systematic method to extract creep properties accurately during indentation creep tests. Samples made from an Al–5.3mol%Mg solid-solution alloy were tested at temperatures ranging from 573 to 773K. Finite-element simulations confirmed that, for a power-la...
متن کاملInvestigation of indentation derived creep response using constant load and constant strain rate methods
Time dependent plastic deformation in metals can occur at high temperatures. Typically the creep test is conducted to characterize the deformation features; however, the conventional uniaxial power-law creep test may be impractical for small scale materials. Accordingly, instrumented indentation techniques are frequently employed. This study concerns the employment of instrumented indentation t...
متن کاملA viscoelastic constitutive model can accurately represent entire creep indentation tests of human patella cartilage.
Cartilage material properties provide important insights into joint health, and cartilage material models are used in whole-joint finite element models. Although the biphasic model representing experimental creep indentation tests is commonly used to characterize cartilage, cartilage short-term response to loading is generally not characterized using the biphasic model. The purpose of this stud...
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ژورنال
عنوان ژورنال: Journal of Materials Research
سال: 2010
ISSN: 0884-2914,2044-5326
DOI: 10.1557/jmr.2010.0092