The correction of temperature-dependent Vickers hardness of cemented carbide base on the developed high-temperature hardness tester

Guo, Bicheng; Cao, Liang; Zhang, Tao; Jiang, Feng; Lü, Yan

doi:10.1016/j.jmatprotec.2017.12.041

Cited by 42 publications

(10 citation statements)

References 20 publications

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“…In order to analyze the mechanism of crack initiation, the hardness distribution of the welding region around the fatigue crack is measured by using a Vickers hardness tester [25][26][27] (Figure 12). The route of indentations successively crosses the parent metal (closed rib plate), heat-affected zone, weld toe (around the fatigue-crack-initiating point) and weld of specimen (from left to right in Figure 12b), and the distance between indentations is about 0.5 mm.…”

Section: Hardness Measurements Around the Crackmentioning

confidence: 99%

Fatigue Property and Improvement of a Rounded Welding Region between the Diaphragm Plate and Closed Rib of an Orthotropic Steel Bridge Deck

Zhang

Lü

2020

Metals

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By means of finite element modeling (FEM) and fatigue experiments, we study the fatigue performance of the rounded welding region between the diaphragm plate and closed rib of orthotropic steel bridge deck in this work. A local sub-model of the rounded welding region from the orthotropic steel bridge deck was developed to analyze the stress distributions. Based on the analysis results we designed the fatigue specimen for the fatigue test of this detailed structure. The fatigue experimental results revealed that the crack initiates from the weld toe of the rounded welding region and the stress concentration at the rounded welding region is the main mechanism of fatigue crack initiation. In addition, we propose three improvements to reduce the stress concentration of the rounded welding region, and the local structure optimization scheme of the diaphragm–rib weld can effectively improve the fatigue resistance of the detailed weld structure.

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Section: Hardness Measurements Around the Crackmentioning

confidence: 99%

Fatigue Property and Improvement of a Rounded Welding Region between the Diaphragm Plate and Closed Rib of an Orthotropic Steel Bridge Deck

Zhang

Lü

2020

Metals

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“…Hardness is probably one of the most difficult mechanical properties to predict and compare with experimental data. It not only presents a dependency with the porosity [106] or grain size [107], but also with other variables related to the measurement, such as indentation type (nano or micro), load and time [108,109]. During the last two decades, different models have been proposed to predict the hardness of materials [110][111][112].…”

Section: Isotropic Mechanical Propertiesmentioning

confidence: 99%

High-throughput screening of the thermoelastic properties of ultra-high temperature ceramics

Nath¹,

Plata²,

Santana³

et al. 2020

Preprint

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Ultra-high temperature ceramics, UHTCs, are a group of materials with high technological interest because their use in extreme environments. However, their characterization at high temperatures represents the main obstacle for their fast development. Obstacles are found from a experimental point of view, where only few laboratories around the world have the resources to test these materials under extreme conditions, and also from a theoretical point of view, where actual methods are extremely expensive. Here, a new theoretical high-throughput framework for the prediction of the thermoelastic properties of materials is introduced. This approach can be systematically applied to any kind of crystalline material, drastically reducing the computational cost of previous methodologies. Elastic constants for UHTCs have been calculated at a wide range of temperatures with excellent agreement with experimentally reported values. Moreover, other mechanical properties such a bulk modulus, shear modulus or Poisson ration have been also explored. Other frameworks with similar computational cost have been used only for predicting isotropic or averaged properties, however this new approach opens the door to the calculation of anisotropic properties at a very low computational cost.

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“…Additionally, further parameters, such as Vickers hardness, were considered in the estimation of the wear of the cutting tool for rocks, such as granite, in the research of Sánchez Delgado et al (2005). In this respect, the Vickers hardness test enables a factor to be determined that relates the force applied through the Vickers hardness tester and the existing contact surface of the material analysed (Guo et al 2018;Shahdad et al 2007). Kahraman et al (2006) developed a regression model to predict the number of carbonate minerals produced by diamond segments.…”

Section: Introduction and Literature Reviewmentioning

confidence: 99%

Analysing the life index of diamond cutting tools for marble building stones based on laboratory and field investigations

Bahri

Ghasemi

Kadkhodaei

et al. 2021

Bull Eng Geol Environ

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Cutting tool wear constitutes one of the principal parameters in the processing cost of building stone. The life index of the cutting tool is obtained by evaluating the wear of diamond segments in the processing plants and examining the main parameters thereof. The purpose of this study is to determine the life index of the diamond cutting tool by considering the physico-mechanical properties of marble stones and the operational parameter of cutting speed. To this end, a dataset was provided by collecting the data from eight building stone processing plants in the provinces of Tehran, Isfahan, and Yazd of Iran. In this regard, the number of square metres of building stone that every diamond cutting tool can cut during its lifetime is defined as the cutting tool life index (TLI). After collecting the required data, SPSS software was employed for statistical analysis. The results revealed that the Brazilian tensile strength is the main parameter that affects the cutting tool life index. Linear and non-linear regression analyses were then considered for the development of predictive models for the TLI based on the Brazilian tensile strength. The performance of the developed models was subsequently examined by using three different criteria: the coefficient of determination, the variance accounted for, and the root-mean-square error. The results of this study show that the non-linear predictive model of the TLI presents a very good performance, and thus, the diamond cutting tool life index can be obtained for marble stones by considering the model developed herein.

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The correction of temperature-dependent Vickers hardness of cemented carbide base on the developed high-temperature hardness tester

Cited by 42 publications

References 20 publications

Fatigue Property and Improvement of a Rounded Welding Region between the Diaphragm Plate and Closed Rib of an Orthotropic Steel Bridge Deck

Fatigue Property and Improvement of a Rounded Welding Region between the Diaphragm Plate and Closed Rib of an Orthotropic Steel Bridge Deck

High-throughput screening of the thermoelastic properties of ultra-high temperature ceramics

Analysing the life index of diamond cutting tools for marble building stones based on laboratory and field investigations

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