Biaxial Strength Testing on Mini Specimens

Dänzer, Robert; Supancic, Peter; Harrer, Walter; Börger, Andreas

doi:10.1007/1-4020-4972-2_292

Cited by 7 publications

(10 citation statements)

References 5 publications

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“…In addition, extraneous flaws introduced along the edges during the fabrication of the bend bars often become the origin of fracture. 2 In contrast, the equibiaxial flexural strength test also referred to as a TRS test, requires a simple right cylindrical test specimen. Additionally, 3-and 4point bend tests only provide information about the mechanical properties of ceramic materials under uniaxial loading.…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, 3-and 4point bend tests only provide information about the mechanical properties of ceramic materials under uniaxial loading. 2 It is important to use other methods to evaluate the mechanical properties under multiaxial loading states to obtain a more accurate rupture strength, particularly for specimens loaded | 129…”

Section: Introductionmentioning

confidence: 99%

“…Unlike 3-and 4-point flexural strength tests, TRS tests measure mechanical properties in a biaxial stress state, which can better predict the behavior of ceramic parts during operation. 2 The TRS test offers significant advantages over the bend bar techniques, namely, fabrication costs and time can be significantly reduced, and extraneous flaws can be avoided due to the lack of required machining of TRS test specimens. The simple right cylindrical geometry allows for rapid fabrication of test specimens used to obtain the sample size (N > 30) required to develop a statistically relevant description of the mechanical behavior of ceramic materials (N < 30 does not allow a distinction between Weibull, Gaussian or other similar distribution functions).…”

Section: Introductionmentioning

confidence: 99%

“…3 Additionally, the TRS test method provides reduced friction during testing and the quality of the edges does not influence the measurement. 2 Two disadvantages of this test method are the reduced volume being tested and the assumptions used to calculate the contact radius between the test sample and the loading ball as determined by the sample thickness and loading ball radius. The advantages of TRS tests seem to outweigh the disadvantages, and while some of the flexure data are available, several common ceramic materials are lacking, specifically for the ball-on-ring method.…”

Section: Introductionmentioning

confidence: 99%

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Ball‐on‐ring test validation for equibiaxial flexural strength testing of engineered ceramics

Lupercio

Moshkelgosha

Winters

et al. 2021

Int J Ceramic Engine & Sci

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The validation of a ball-on-ring, equibiaxial flexural strength method to obtain the transverse rupture strength (TRS) of right cylindrical ceramic specimens was performed in this study. Validation of the test method was achieved using commercially available engineered high purity alumina disks and finite element (FE) model analysis. The validated fixture was then used to obtain the TRS and Weibull statistical analysis of MgOpartially stabilized zirconia (MSZ) and Y 2 O 3-partially stabilized zirconia (YSZ) ceramic disks. TRS data for alumina, MSZ, and YSZ agreed with the TRS values reported in the literature. A statistically relevant number of samples (N>30) for each material were tested to allow for a Weibull statistical analysis. Weibull parameters for these materials were within the expected values for engineered ceramics. The characteristic strength for alumina, MSZ, and YSZ were determined to be 289 MPa, 786 MPa, and 814 MPa, respectively. The Weibull modulus was determined between 10-25 for each material, which is typical of engineered ceramics. In addition, Accepted Article This article is protected by copyright. All rights reserved FE model results were in close agreement with experimental fracture values for the three ceramic materials tested in this study.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Ball‐on‐ring test validation for equibiaxial flexural strength testing of engineered ceramics

Lupercio

Moshkelgosha

Winters

et al. 2021

Int J Ceramic Engine & Sci

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“…Dentro de la caracterización mecánica, el ensayo de flexión biaxial, ball on three balls, ofrece ventajas respecto a los ensayos uniaxiales, como la fácil preparación de las muestras, la mejor tolerancia a la planitud del disco y la fricción mínima entre la probeta y la bola de carga [8] . Es un ensayo típica-mente utilizado en materiales frágiles que ha sido aplicado al estudio de la resistencia de las aleaciones Ti-Nb.…”

Section: Introductionunclassified

Caracterización mecánica de aleaciones Ti-Nb mediante ensayos de flexión biaxial

Benavente-Martínez¹,

Devesa²,

Amigó³

2010

REVMETAL

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ResumenEn la actualidad, cada vez, son más importantes en la industria las aleaciones de titanio. En especial las aleaciones tipo-β, que destacan por tener buenas propiedades resistentes y bajos módulos elásticos, en comparación con el Ti c.p. o el Ti-6Al-4V. Dentro de estas aleaciones cabe destacar las Ti-Nb con altos contenidos en elementos aleantes. En este trabajo se han obtenido, mediante pulvimetalurgia convencional, una serie de aleaciones Ti-Nb, en el rango del 20-40 % de niobio. Se ha obtenido la evolución de las propiedades de dichas aleaciones en función del porcentaje de niobio, mediante la utilización del ensayo de flexión biaxial con tres apoyos (three ball test). Palabras clavePulvimetalurgia;Ti-Nb; Flexión biaxial; Fractura; Modulo elástico; Aleaciones β-Ti. Mechanical characterization of Ti-Nb alloys by ball on three balls test AbstractNowadays titanium and titanium alloys are increasingly being used in the industry. Particularly β-Ti alloys that stand out for having great strength properties and low elastic modulus compared to Ti c.p. or Ti-6Al-4V. Among Ti alloys, Ti-Nb alloys with high contents of alloying elements are widely used. In this work Ti-Nb alloys have been obtained using conventional powder metallurgy. It has been studied the evolution of properties of these alloys as a function of the percentage of niobium. It can be noted the ball on three balls test used in order to characterize the samples. KeywordsPowder metallurgy; Ti-Nb; Ball on three balls test; Young's modulus; β-Ti alloys. INTRODUCCIÓNEl titanio y sus aleaciones tienen aplicación en diversidad de campos. Uno de los usos más conocidos tiene lugar en el de la biomedicina, por su excelente biocompatibilidad, baja densidad, resistencia a la corrosión y adecuadas propiedades mecánicas [1] . También, en otros campos como en el sector automovilístico [2] o, incluso, en el área de equipamiento deportivo [3] , está siendo ampliamente utilizado, dado que es un material que destaca por su buena relación resistencia frente a peso.Las aleaciones de titanio tipo β son las más versátiles dentro de las aleaciones de titanio. Destacan por su alta resistencia específica y por la interesante combinación de resistencia, tenacidad y resistencia a la fatiga. Además, por su bajo módulo elástico y buena resistencia a la corrosión constituyen un material muy apropiado para implantes quirúrgicos [4 y 5] .Por esta razón es de especial interés el estudio de aleaciones base titanio a partir de elementos no tóxi-cos como niobio, molibdeno o tántalo, que presentan mejor biocompatibilidad, además de un módulo elástico menor que Ti-6Al-4V por ser estabilizadores de la fase β [6 y 7] . La pulvimetalurgia es una téc-nica que permite obtener formas cercanas a la pieza acabada incluso con geometrías complejas y, dada su versatilidad, es una buena alternativa a la hora de procesar este tipo de aleaciones.Dentro de la caracterización mecánica, el ensayo de flexión biaxial, ball on three balls, ofrece ventajas respecto a los ensayos uniaxiales, como la fácil ...

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Testing Efficiency of Stone Conservation Treatments

Drdácký

2018

Advanced Materials for the Conservation of Stone

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Biaxial Strength Testing on Mini Specimens

Cited by 7 publications

References 5 publications

Ball‐on‐ring test validation for equibiaxial flexural strength testing of engineered ceramics

Ball‐on‐ring test validation for equibiaxial flexural strength testing of engineered ceramics

Caracterización mecánica de aleaciones Ti-Nb mediante ensayos de flexión biaxial

Testing Efficiency of Stone Conservation Treatments

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