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Showing 1 to 8 of 8 for “"indentation creep"”.
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Indentation vs. Uniaxial Power-law Creep of Sn-based Solder Material: A Numerical Assessment
It is crucial to understand the creep behavior of Pb-free solder alloys in electronic packaging. Typical service environments are between 298 and 373K. The thermal mismatch induced stresses acting on solder joints result in extensive rate-dependent plastic deformation. The solder alloy is …
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Synthesis, Consolidation, and Mechanical Testing of Nanophase Metals
Indentation creep experiments were performed on nanocrystalline copper and palladium specimens and also on sinterforged Ti-48Al specimens. The copper and palladium specimens showed a higher creep rate than their microcrystalline counterparts, exhibiting creep even at room temperature. The …
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Extraction of mechanical properties over a range of strain rates from indentation data
A procedure is described for indentation creep plastometry. It is based on iterative numerical simulation of the indentation process, with repeated comparison between an experimental outcome and the corresponding model prediction, systematically varying the values of parameters in a constitutive …
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Investigation of indentation derived creep response using constant load and constant strain rate methods
… 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 …
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Multiscale In-Situ Characterization of Crystal Orientation, Temperature, and Microstructure Effects on Creep Defromation of Pure Magnesium and Mg-Al-RE Alloys
… Their broader use is restricted by limited creep resistance and pronounced anisotropy of plastic deformation, especially at elevated temperatures. This thesis examines how crystal orientation, temperature, and β-phase morphology govern creep behavior in pure Mg and AE44 alloys. Novel in-situ …
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Creep properties of source rocks using indentation : the role of organic matter on texture and creep rates
… of organic matter affecting texture and driving creep behavior in source rocks. To isolate the porous organic-rich clay composites, we adopt elaborate methodology that uses the mechanical properties probed with the indentation technique, chemistry obtained from spectroscopy, and chemo-mechanical …
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Multi-Component Characterization of Strain Rate Sensitivity in Pharmaceutical Materials
… scaled values of three lab-scale parameters: 1) Indentation Creep SRS Exponent, 2) ΔSFfinal, and 3) Heckel-Based SRS Index were used to describe material behavior. Using this combination of parameters, the sensitivity of the materials and mixtures can be quantified in terms of plasticity and …
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Numerical and Experimental Study of Rock Fracture Creep Under Dry Conditions
… fractures changes with time (the rock fractures creep). Rock fracture creep is a coupled process of four mechanisms: mechanical compression, pressure solution, dissolution, and erosion. To obtain systematic results, it is important to consider these mechanisms separately. Previous research …