Special Composite Squeeze Castings

Progress in Investment Castings

Accuracy of Investment Castings

In the paper the analysis of wax pattern and casting dimensions changes during each stages of investment casting technology process has been presented. Results of wax patterns and castings of test plate free and restrained contractions dimensions changes research carried out in Department of Foundry Engineering at Brno University of Technology have been presented as well. Moreover obtained resu...

Near-congruent solidification of castings

Chaput Kevin J. Ph.D., Purdue University, May 2015. Near-Congruent Solidification of Castings. Major Professor: Kevin Trumble. A study on the microstructure development of as-cast Cu-Mn alloys based around the congruent minimum at 34.6 wt % Mn and 873 oC was performed. Initially, this was to evaluate the alloy as an alternative to wide freezing range Pb and Sn bronzes that are plagued with poro...

Two Different Squeeze Transformations

Lorentz boosts are squeeze transformations. While these transformations are similar to those in squeezed states of light, they are fundamentally different from both physical and mathematical points of view. The difference is illustrated in terms of two coupled harmonic oscillators, and in terms of the covariant harmonic oscillator formalism. The word “squeezed state” is relatively new and was d...

Surface roughness classification for castings

The proper functioning of a machined part is in many instances largely dependent on the quality of its surface. Engineering properties such as fatigue, hardness and heat transfer are affected by surface finish. Several devices have been developed to measure surface roughness (Amstead et al. 1987). The simplest procedure is a visual comparison with an established standard, while the most commonl...