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Online since: December 2014
Authors: Yi Sheng Zhang, Kai Wang, Pei Xing Liu, Zhi Bin Wang
Based on tensile tests, the ultimate tensile strength (UTS) and elongation (El) of specimens under different austenitization conditions are obtained.
The specimen austenitized at 850 °C for 3 min has a UTS of 558MPa and an El of 27.99%.
In contrast, the UTS and El of the specimen austenitized at 1000 °C for 10 min are respectively 1540MPa and 5.46%, which indicates that the austenitic transformation is relatively sufficient to obtain a martensitic structure.
S., Thermo-mechanical behavior of the Al-Si alloy coated hot stamping boron steel, Mater.
[4] Wang C., Chen S., The high-temperature oxidation behavior of hot-dipping Al-Si coating on low carbon steel, Surf.
Online since: October 2011
Authors: M. El-Hofy, Morsy M.A. Sekkina, Khaled M. Elsabawy, M. Bediwy
El-Hofya, 1Khaled M.
Wang et al. [7] on Bi (2212) single crystal have observed attenuation peaks at 95 K, 130 K, 200 K, which were attributed to structural phase change.
While, Nes el al. [8] observed internal friction peaks at some different positions (95 K, 130 K, 220 K); with anomalies in the velocity measurements near to Tc.
The effect of Pb on defect formation and intra-granular Jc was investigated by Crossley et al. [15] in bulk material.
According to Abrikosov et al [16] the nonlinear behavior of ,Tc vs x, excluded any magnetic origin for the observed Tc depression, which can be readily attributed to the hole filling caused by the liberated electrons of Te4+ ions.
Online since: September 2007
Authors: Li Ping Yu, Yin Cheng, Han Ning Xiao
El-Maliegy, Br.
Suzuki, et al, J.
Chun, et el., J.
Rotin, et al., J.
Yasumori, et el., J.
Online since: June 2014
Authors: It Meng Low, Wei Kong Pang
However, mixed results have been reported by Radhakrishnan et al. [23].
El-Raghy, The MAX phases: Unique new carbide and nitride materials, Am.
El-Raghy, Synthesis and characterization of remarkable ceramic: Ti3SiC2, J.
El-Raghy, Reaction of Al with Ti3SiC2 in the 800–1000°C temperature range, Mater.
El-Raghy, Influence of small amounts of Fe and V on the synthesis and stability of Ti3SiC2, J.
Online since: February 2012
Authors: Ji Wei Wang, Jian Min Zeng, Yu Sheng Shi, Guang Ke Lin, Qing Song Wei
The average values of ultimate tensile strength (UTS), yield strength (YS) and elongation (EL) are 1119 MPa, 1043 MPa and 18% respectively.
Chemical composition of Ti6Al4V powder [wt.%] Alloy O N C H Fe Al V Ti Ti6Al4V 0.09 0.01 0.02 0.002 0.04 6.0 4.0 balance The microstructures of the as–HIPed blanks were investigated using scanning electron microscopy (Quanta 200, FEI, Holand).
It can be seen from the table the average values yield strength (YS), ultimate tensile strength (UTS) and the elongation (EL) of the as-HIPed tensile samples are 1043 MPa, 1119 MPa and 18 pct respectively.
Tensile properties of HIPed powder Ti6Al4V and forged sample Material condition 0.2% YS [MPa] UTS [MPa] %EL As-HIPed (900℃/100MPa/3h) 1064, 1039, 1027 1141, 1114, 1101 19, 17, 18 Forged sample (920-940℃) [8] 875 965 15 Fractography Fracture surfaces of the tensile specimens were examined, as shown in Figure 6.
Online since: June 2012
Authors: Li Zhou, Li Fu Xu, Shu Tao Huang, Da Shan Bai
SiCp/Al composites have been used in a number of engineering applications including the consumer goods.
SiCp/Al composites are very difficult to machining because of the hard particles in the Al alloy matrix.
But up to now little research work has been done on researching the drilling properties of SiCp/Al composites, especially for the high volume fraction and large particle size SiCp/Al composites.
Microstructure of SiCp/Al composites Fig. 2.
El-Gallab and M.
Online since: January 2010
Authors: Chitoshi Masuda, Yoshiyuki Saito
The ARB experiments were performed for pure Al and Al alloys-sheets in order to validate the computer simulation results concerning the grain boundary stability of textured materials.
This bifurcation was observed by Eichelkraut at el. [4] in their statistical simulation.
This bifurcation was observed by Eichelkraut at el. [4] in their statistical simulations.
Experimental verification The ARB(Accumulative Roll-Bonding)[17] rolling experiments for pure Al and Al alloys sheets were were performed on a pilot mill at the National Research Institute for Materials Science.
In order to validate the simulation results, the ARB experiments were performed for the pure Al system.
Online since: November 2012
Authors: Xiang Jun Liu, Yin Shu Liu, Yun Fei Shi, Hui Jiao Nie
In Fig 8b, EL model can not fit the isotherm data well at medium and high concentration.
(b) (a) Fig 8 The fitting results of AD models and EL model on activated alumina A Summary of fitting standard errors(SE) and relativities(R) are shown in Table 1.
The EL model cann’t fit the isotherm data well at medium and high concentration.
Taveira, et al.
Lee, et al.
Online since: February 2013
Authors: Medhat Nemitallah, Meamer El-Nakla
An excellent review of previous studies was reported by Doerffer et al. [1].
Groeneveld et al. [8], for the mass flux modeling parameter, recommended a dimensionless parameter with the mass flux that is used in the generalized CHF correlation developed by Katto [9].
This factor is based on the heat transfer coefficient equation used in El Nakla work [13]: .
All of the experimental data recorded in this work are from the work done by El Nakla [13].
[13] Meamer El Nakla, On fluid-to-fluid modeling of film boiling heat transfer using dimensional analysis, International Journal of Multiphase Flow 37 (2011) 229–234
Online since: July 2015
Authors: Anil Meena, Mohamed El Mansori
Klocke et al. [4] have shown that the ausferrite microstructure has a tendency to adhere with tungsten-based carbide tools.
EDS spectra of the fracture part revealed the presence of oxidized coating material (Al, Ti with high content of O).
El Mansori.
El Mansori.
El Mansori.
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