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2016-01-01

Mohammadijoo, M., Kenny, S., Ivey, D.G., Collins, L., Henein, H.

High strength low carbon microalloyed steels may be adversely affected by the high heat input and thermal cycle that they experience during tandem submerged arc welding (TSAW). The heat affected zone (HAZ), particularly the coarse grained heat affected zone (CGHAZ), i.e., the region adjacent to...

2016-01-01

C. Jian, M.R. Poopari, Q.X. Liu, N. Zerpa, H. Zeng & T. Tang

2016-01-01

Mohammadijoo, M., Ivey, D.G., Collins, L., Henein, H.

The addition of a cold wire in conventional tandem submerged arc welding (TSAW), i.e., the CWTSAW process, is proposed to improve the productivity of pipeline manufacturing by increasing welding travel speed and deposition rate, while retaining adequate joint geometry without increasing the...

2016-01-01

Delshad Khatibi, P., Phillion, A.B., Henein, H.

The effect of isochronal annealing on D2 tool steel powder, rapidly solidified via both Impulse Atomization and Water Atomization, has been evaluated using high-resolution scanning electron microscopy and Vickers microhardness. The amount of supersaturation of the alloying elements inside the...

2016-01-01

Bedel, M., Reinhart, G., Bogno, A.-A., Gandin, Ch.-A., Jacomet, S., Boller, E., Nguyen-Thi, H., Henein, H.

The Impulse Atomization process developed at the University of Alberta (Canada) enables metallic powders to be solidified with well controlled process parameters. The inner microstructure of several droplets of Al-4.5wt.%Cu alloy produced by this technique has been investigated by using both...

2016-01-01

Bogno, A.-A., Riveros, C., Henein, H., Li, D.

This paper investigates amorphous phase formation and rapid solidification characteristics of a CoCr alloy. High cooling rate and high undercooling-induced rapid solidification of the alloy was achieved by impulse atomization in helium atmosphere. Two atomization experiments were carried out to...

2016-01-01

Feng, Lin, Chen, Ming, Zheng, Fei, Niu, Meng-Si, Zhang, Xuehua, Hao, Xiao-Tao

A novel nanocomposite of P3HT and Ag nanoparticles (Ag-P3HT) has been synthesized by laser ablation. The fluorescence wavelength of the nanocomposite can be tuned by varying the ablation duration. The steady-state emission maximum at 580 nm for pristine P3HT shows significant blueshift to...

2015-07-02

Alireza Fatehi

The Hybrid tank pilot plant was designed in Process Control Laboratory (PCL) of the University of Alberta at 2009. In this report, we try to construct a model for this process. Using the physical behavior of the plant, it is possible to have the nonlinear first principle dynamic model of that...

2015-12-01

Liu, Xiumei, Bao, Lei, Dipalo, Michele, De Angelis, Francesco, Zhang, Xuehua

Bubble formation from plasmonic heating of nanostructures is of great interest in many applications. In this work, we study experimentally the intrinsic effects of the number of three-dimensional plasmonic nanostructures on the dynamics of microbubbles, largely decoupled from the effects of...

2015-01-01

Guo, Zhenjiang, Liu, Yawei, Lohse, Detlef, Zhang, Xuehua, Zhang, Xianren

We numerically study different forms of nanoscale gaseous domains on a model for rough surfaces. Our calculations based on the constrained lattice density functional theory show that the inter-connectivity of pores surrounded by neighboring nanoposts, which model the surface roughness, leads to...