Experimental Study on Strengthening Mechanism of Al-Zn-Mg-Cu System Alloy.

The surface of Al2O3 coating sprayed on 40Cr substrate was re-melted with high power continuous CO2 laser, and its micro-hardness and residual stresses were measured, respectively. The strengthening mechanism of Al2O3 coating by laser re-melting was analyzed and discussed. The experimental results shown that the surface of Al2O3 coating by laser re-melting is neat and smooth, and its compositions are even, its structures are compact, and Al2O3 coating is evenly distributed in its surface with grain forms, and its micro-hardness increases about 200%; Residual stress of Al2O3 coating by laser re-melting is changed into compressive stress from tensile stress, which is benefit to improving bonding strength of coating-substrate interface.

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Experimental Study on Dry Shrinkage of LSFRC and LHFRC

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.204-208.1933 ◽

2012 ◽

Vol 204-208 ◽

pp. 1933-1936

Author(s):

Peng Li ◽

Dong Qing He

Keyword(s):

Experimental Study ◽

Influencing Factors ◽

Layered Structure ◽

Concrete Structure ◽

Theoretical Study ◽

Strengthening Mechanism ◽

Enhancement Effect ◽

Dry Shrinkage ◽

Complex Components

Layered structure (LSFRC and LHFRC) have some characteristics: the composition of complex components, influencing factors, structure forms. Fiber mixed really adds the complexity of the test and theoretical study. In view of the dry shrinkage performance, the study is done on the research of the general concrete structure (C) enhancement effect and strengthening mechanism for the wide use in engineering foundation.

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Experimental study on the restoration from a tilt-azimuth series for improvement in resolution

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010013955x ◽

1995 ◽

Vol 53 ◽

pp. 636-637

Author(s):

Norio Baba ◽

Norihiko Ichise ◽

Syunya Watanabe

Keyword(s):

Experimental Study ◽

Spherical Aberration ◽

Incident Beam ◽

Optical Parameters ◽

Beam Tilting ◽

Illumination Method ◽

Restoration Method ◽

Illumination Mode

The tilted beam illumination method is used to improve the resolution comparing with the axial illumination mode. Using this advantage, a restoration method of several tilted beam images covering the full azimuthal range was proposed by Saxton, and experimentally examined. To make this technique more reliable it seems that some practical problems still remain. In this report the restoration was attempted and the problems were considered. In our study, four problems were pointed out for the experiment of the restoration. (1) Accurate beam tilt adjustment to fit the incident beam to the coma-free axis for the symmetrical beam tilting over the full azimuthal range. (2) Accurate measurements of the optical parameters which are necessary to design the restoration filter. Even if the spherical aberration coefficient Cs is known with accuracy and the axial astigmatism is sufficiently compensated, at least the defocus value must be measured. (3) Accurate alignment of the tilt-azimuth series images.

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