Thoriated nickel bonded by solid-state diffusion method

Solid-state diffusion bonding in an inert-gas atmosphere forms high-strength joints between butting or overlapping surfaces of thoriated nickel. This method eliminates inert-phase agglomeration

Exposure of Tradescantia Microspores to Periodic Vibrations of 40-100 Hertz

Spherical chromosomal fragments determined in exposure of Tradescantia microspores to periodic vibration

The weld-brazing metal joining process

Superior mechanical properties were obtained in metal joints weld-brazed between faying surfaces. Weld-braze applications and advantages are listed

Weld-brazing - a new joining process

A joining process designated weld brazing which combines resistance spot welding and brazing has been developed. Resistance spot welding is used to position and align the parts as well as to establish a suitable faying surface gap for brazing. Fabrication is then completed by capillary flow of the braze alloy into the joint. The process has been used successfully to fabricate Ti-6Al-4V titanium alloy joints using 3003 aluminum braze alloy. Test results obtained on single overlap and hat-stiffened structural specimens show that weld brazed joints are superior in tensile shear, stress rupture, fatigue, and buckling than joint fabricated by spotwelding or brazing. Another attractive feature of the process is that the brazed joints is hermetically sealed by the braze material

Controlled glass bead peening Patent

Method and apparatus for inducing compressive stresses in pressure vessel to prevent stress corrosio

Communications for Social Good - Discussion Guide

This discussion guide contains six sets of questions designed to help foundations, and the nonprofit organizations they support, to plan effective communications campaigns. The questions are excerpted from the paper, Communications for Social Good, by Susan Nall Bales and Franklin D. Gilliam, Jr., and cover the key elements in the design of successful campaigns: defining the problem, audience, messenger, medium, and evaluation strategy. The questions are included here for the convenience of readers who wish to use them for individual review or group discussion purposes.

Communications for Social Good - Executive Summary

If foundations are more intentional in using communications as a tool for social change, and if they incorporate what is known about how the media affect individuals and groups into their grantmaking, they will be much more likely to achieve the kind of long-term change in public understanding and opinion that is needed to maximize their impact. This paper presents the latest perspectives from communications theory and practice in order to update philanthropic thinking and help philanthropists judge effective communications practices among their grantees and within their own organizations

Communications for Social Good

Examines foundation opportunities and techniques to leverage social change goals through the use of communications media. Part of the series Practice Matters: The Improving Philanthropy Project

Fabrication and evaluation of superplastically formed/weld-brazed corrugated compression panels with beaded webs

A study was made to investigate the feasibility of superplastically forming corrugated panels with beaded webs and to demonstrate the structural integrity of these panels by testing. The test panels in the study consist of superplastically formed titanium alloy Ti-6Al-4V half-hat elements that are joined by weld-brazing to titanium alloy Ti-6Al-4V caps to form either single-corrugation compression panels or multiple-corrugation compression panels. Stretching and subsequent thinning of the titanium sheet during superplastic forming is reduced by approximately 35 percent with a shallow half-hat die concept instead of a deep die concept and results in a more uniform thickness across the beaded webs. The complete panels are tested in end compression at room temperature and the results compared with analysis. The heavily loaded panels failed at loads approaching the yield strength of the titanium material. At maximum load, the caps wrinkled locally accompanied with separation of the weld-braze joint in the wrinkle. None of the panels tested, however, failed catastrophically in the weld-braze joint. Experimental test results are in good agreement with structural analysis of the panels