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Online since: March 2014
Authors: James Kear, Andrew P. Bunger
Table 1 - Material Properties of Adeliade Black Granite Property Value Unit Elastic Modulus 102 GPa Poisson's Ratio 0.27 Fracture Toughness 2.5 MPa.m0.5 Density 3065 kg/m3 Typical grain diameter 1-10 mm As Adelaide Black Granite is a brittle material that is much stronger in compression than tension, each of the following three experimental configurations resulted in tensile failure of the material: three-point bend, four-point bend and indirect tensile (Brazilian) tests.
Table 2 - Results Summary Three-point bend Four-point bend Indirect tensile Specimen Size Height: 40mm Thickness: 20mm Support: 180mm Height: 40mm Thickness: 20mm Support: 180mm Diameter 62mm Thickness 28mm Number of tests 9 18 10 Exponential fitting parameters a = 1.321018 b = -2.00 a = 2.131018 b = -2.368 a = 1.141020 b = -3.894 Goodness of fit (exponential) r2=0.98 r2=0.67 r2=0.80 Power law fitting parameters a = 41046 b = -35.16 a = 31043 b = -34.49 a = 71041 b = -38.81 Goodness of fit (power law) r2=0.98 r2=0.66 r2=0.81 Predicted tensile stress for time to failure of 1s (approx instantaneous failure) 20.7 MPa 17.8 MPa 11.9 MPa Predicted tensile stress for time to failure of s or 317 million years (See discussion section) 2.4 MPa 2.3 MPa 2.4 MPa Discussion The dependence of both the coefficient and the power law exponent (or the scaling of the quantity in the argument of the exponential law) on the testing configuration is consistent with a conceptual explanation
Online since: June 2014
Authors: Wen Yuan Xu, Li Jie Guo, Xiao Cong Yang, Chao Yang
Second, although the cement content in the fill body at the far end of the model increases along the length, its grain size fraction composition also changes to a finer particle size, which decreases fill body strength and offsets any possible positive effect of increase in cement content.
Microanalysis by SEM and XRD allows for a possible explanation: the cement content is not in direct proportion to the fill body strength but rather, the cement particle distribution is closely related to the fill body strength and the aggregation of a large number of cement particles adversely affects fill body strength.
Online since: April 2013
Authors: Marion Merklein, Ozan Singar
Hardness values less than 100 HV can be related to a fine grain formation in the welding zone.
similar gage tailor welded blanks using the rule of mixtures Abudallah, K., Wild, P.M., Jeswiet, J.J., Ghasempoor, A., Journal of Materials Processing Technology, 112 (2001), 91-97 [3] Influence of Filler Composition on the Microstructure and Mechanical Properties of Steel- Aluminum Joints Produced by Metal Arc Joining Agudo, L.J, Weber, S., Leitner, A., Arenholz, E., Bruckner, J., Hackl, H., Pyzalla, A.R., Advanced Engineering Materials,11, No.5 (2009), 350-358 [4] Intermetallic FexAly-phases in a steel/Al-alloy fusion weld Agudo, L.J, Eyidi, D., Schmaranzer, C.H., Arenholz, E., Jank, N., Bruckner, J., Pyzalla, A.R, Journal of Mater Sci 42: (2007), 4205-4214 [5] Die Stahl – Aluminium- Hybridplatine – eine innovative Lösung für den Mischbau Bruckner, J., Arenholz, E., DVS Congress 275 (2011), 235-237 [6] Schweißverbindungen von Stahl mit Aluminium – eine Perspektive für die Zukunft Jank, N., Staufer, H., Bruckner, J., BHM Berg- und Hüttenmännische Monatshefte, (2008) Volume 153, Number
Online since: July 2013
Authors: A.I. Rudskoy, G.E. Kodzhaspirov
The past decades has involved a number of investigators in many countries developing mathematical models to predict the final mechanical properties of hot rolled steels.
During TMCP at the deformation temperature of 850°C, no recrystallized grains were observed in any of the specimens studied.
Online since: October 2011
Authors: Yan Xiang Wang, Jian Sun, Min Xu
The viscosity of isopropanol is higher than that of ethanol, so the number of TiO2 nuclei in isopropanol system is less than that in the ethanol system, which led to grain sizes of TiO2 powders using isopropanol as the oxygen donor are smaller and easier to agglomerate than that using ethanol.
Online since: March 2023
Authors: Munawir Munawir, Wahyuni Wahyuni, Sarina Zein Keumala Citra, Rizqy F. Vito, Tamim I. Rais
The cement has met Indonesian National Standard (SNI) 2049:2015 [9] and Indonesian Standard (SI), so that no laboratory examination is carried out, but the inspection is only carried out visually on the bag that is not torn and the state of the grains (no hard lumps) on the cement.
The design of the study is shown table 1 which consists of three variations of Anadara granosa shell ash and fly ash mixture with different testing specimen age and three type of mechanical properties testing and the number of specimen for each test.
Online since: June 2013
Authors: Li Li
A number of studies have shown that FeCAPs are tolerant to 10 keV X–rays and 60Co gamma rays [20].
Radiation effects resulted in increased space charge because of the trapped charge on the grain surfaces.
Online since: August 2008
Authors: Wei Chen Lee, Liang Wei Chen
In addition, to obtain a better surface finish with a grinding depth of about 0.01 mm, the grain size of 100 (fine level) and the structure of J (medium-density level) were selected.
Acknowledgement This work was supported by National Science Council, Taiwan, Republic of China under grant number NSC 80-04010-E008-22.
Online since: October 2014
Authors: Qiu Sheng Yan, Ji Sheng Pan, Sen Kai Chen
Large numbers of experiments show that, the subsurface cracks configuration and depth of the ground SiC wafer were similar in the different detection methods.
The grinding process can be regarded as lots of single grain cross scratches at the surface of the wafer.
Online since: August 2021
Authors: Vyacheslav V. Barakhtenko, Tatiana H. Sahabutdinova, Yury V. Novikov
A number of studies previously conducted [3] have established that finely dispersed mineral industrial waste can not only reduce the cost of PVC-compositions, but also improve the physical and mechanical properties, reduce the coefficient of linear thermal expansion - compression, improve resistance to UV exposure, reduce flammability [4-8].
Study of the Properties of Dispersed Mineral Waste The research objects are: - microspheres (cenospheres) isolated from the ash-and-slag material of a dump of a coal-fired thermal power plant, LLC “Baikal Energy Company”, Angarsk, Irkutsk Region, RF; - microcalcite (marble flour), waste from the extraction and processing of marble in the open pit of the Pereval mine, Slyudyanka, Irkutsk region, RF; - silicon dust - entrainment from the hearth of an electric furnace of fine-grained suspension during the production of refined silicon at the Kremniy enterprise, Shelekhov, Irkutsk region, RF.
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