Bibliografías temáticas / Indentation cracking

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Literatura académica sobre el tema "Indentation cracking"

Autor: Grafiati
Publicado: 23 de noviembre de 2024

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Artículos de revistas sobre el tema "Indentation cracking"

1

Subhash, Ghatu, and Hongwen Zhang. "Dynamic indentation response of ZrHf-based bulk metallic glasses." Journal of Materials Research 22, no. 2 (2007): 478–85. http://dx.doi.org/10.1557/jmr.2007.0058.

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Static and dynamic Vickers indentations were performed on ZrHf-based bulk amorphous alloys. A decrease in indentation hardness was observed at higher strain rates compared with static indentation hardness. For equivalent loads, dynamic indentations produced more severe deformation features on the loading surface than static indentations. Using bonded interface technique, the induced shear band patterns beneath the indentations were studied. In static indentations, the majority of the deformation was primarily accommodated by closely spaced semicircular shear bands surrounding the indentation. In dynamic indentations two sets of widely spaced semicircular shear bands with two different curvatures were observed. The observed shear band patterns and softening in hardness were rationalized based on the variations in the confinement pressure, strain rate, and temperature within the indentation region during dynamic indentations. It is also proposed that free volume migration and formation of nano-voids leading to cracking are favored due to adiabatic heating and consequently cause the observed softening at high strain rates.
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2

Yamazaki, Yasuhiro. "Investigation of the Cracking Behaviors by Indentation Based on an In Situ Observation." Key Engineering Materials 627 (September 2014): 361–64. http://dx.doi.org/10.4028/www.scientific.net/kem.627.361.

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In this paper, an in-situ measurement of crack size as a function of applied indentation load during indentation test was conducted. To perform the in-situ measurement, an instrumented indentation test machine with the in-situ observation system was developed and used. The joints of transparent ceramics by diffusion bonding were prepared as the specimen used in this study. The indentations were performed at the interface of the joints, and in the monolithic transparent ceramics by means of the instrumented indenter with the in-situ observation system. The relationship between crack shape and indentation load, as well as, the effect of the indenter shape on it were discussed.
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3

Abudaia, F. B., J. T. Evans, and B. A. Shaw. "Spherical indentation fatigue cracking." Materials Science and Engineering: A 391, no. 1-2 (2005): 181–87. http://dx.doi.org/10.1016/j.msea.2004.08.068.

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4

Newman, A., T. Jewett, S. Sampath, C. Berndt, and H. Herman. "Indentation Response of Molybdenum Disilicide." Journal of Materials Research 13, no. 9 (1998): 2662–71. http://dx.doi.org/10.1557/jmr.1998.0371.

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The influence of microstructure on the indentation cracking behavior of molybdenum disilicide (MoSi2) has been examined. The indentation response of samples produced by various methods has been measured to examine the elastic/plastic nature, hardness, and fracture toughness. Fracture toughness comparisons were made by measuring indentation crack lengths, observing the elastic/plastic indentation response, and quantifying the differences in the indentation cracking behavior. Further information was gained by monitoring the acoustic activity during indentation for selected specimens. It has been observed that the fine grain size and the dispersion of the silica phase promote microcracking and crack deflection.
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5

Padture, Nitin P. "Postfailure subsidiary cracking from indentation flaws in brittle materials." Journal of Materials Research 8, no. 6 (1993): 1411–17. http://dx.doi.org/10.1557/jmr.1993.1411.

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Vickers indentation sites in ceramics have been examined after specimen failure from median/radial indentation cracks. Evolution of a new cracking pattern of “ortho-lateral” cracks, originating at the intact corners of the Vickers indentation and running orthogonal to the classic-lateral cracks and parallel to the new fracture surface, has been observed. In some instances postfailure extension of the classic-lateral cracks toward the surface was also observed. Enhanced residual tensile stress from relaxation of constraints on the indentation-plastic cavity by the generation of a fracture surface is postulated to drive the subsidiary cracking. A simple qualitative model to explain this phenomenon is presented. Possible implications of such postfailure subsidiary cracking on residual-stress-driven flaws, postmortem fractography, and wear in ceramics are discussed.
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6

Baran, G., W. Shin, A. Abbas, and S. Wunder. "Indentation Cracking of Composite Matrix Materials." Journal of Dental Research 73, no. 8 (1994): 1450–56. http://dx.doi.org/10.1177/00220345940730080901.

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Composite restorative materials wear by a fatigue mechanism in the occlusal contact area. Here, tooth cusps and food debris cyclically indent the restoration. Modeling this phenomenon requires an understanding of material response to indentation. The question in this study was whether material response depends on indenter size and geometry, and also, whether polymers used in restorative materials should be considered elastic and brittle, or plastic and ductile for modeling purposes. Three resins used as matrices in proprietary restorative composites were the experimental materials. To ascertain the influence of glass transition temperature, liquid sorption, and small amounts of filler on indentation response, we prepared materials with various degrees of cure; some samples were soaked in a 50/50 water/ethanol solution, and 3 vol% silica was added in some cases. Indentation experiments revealed that no cracking occurred in any material after indentation by Vickers pyramid or spherical indenters with diameters equal to or smaller than 0.254 mm. Larger spherical indenters induced subsurface median and surface radial and/or ring cracks. Critical loads causing subsurface cracks were measured. Indentation with suitably large spherical indenters provoked an elastoplastic response in polymers, and degree of cure and Tg had less influence on critical load than soaking in solution. Crack morphology was correlated with yield strain. Commonly held assumptions regarding the brittle elastic behavior of composite matrix materials may be incorrect.
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7

Sellappan, P., T. Rouxel, F. Celarie, E. Becker, P. Houizot, and R. Conradt. "Composition dependence of indentation deformation and indentation cracking in glass." Acta Materialia 61, no. 16 (2013): 5949–65. http://dx.doi.org/10.1016/j.actamat.2013.06.034.

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8

Jiang, L. Z., and C. T. Sun. "Analysis of indentation cracking in piezoceramics." International Journal of Solids and Structures 38, no. 10-13 (2001): 1903–18. http://dx.doi.org/10.1016/s0020-7683(00)00142-6.

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9

Buijs, Maarten, and Liesan A. A. G. Martens. "Effect of Indentation Interaction on Cracking." Journal of the American Ceramic Society 75, no. 10 (1992): 2809–14. http://dx.doi.org/10.1111/j.1151-2916.1992.tb05509.x.

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10

Cook, Robert F., and Eric G. Liniger. "Kinetics of Indentation Cracking in Glass." Journal of the American Ceramic Society 76, no. 5 (1993): 1096–105. http://dx.doi.org/10.1111/j.1151-2916.1993.tb03726.x.

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