WJ TOC 2005-05-toc
 WELDING JOURNAL - May 2005, Volume 84, Number 5
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welding journal May 2005 coverMAY, 2005

FEATURES

Cold Spray: A New Technology
A new solid-state spray process (Fig. 1) is quickly being adopted by many industries. Cold spray is capable of providing restoration, sealing, surface modification, wear resistance, thermal barriers, corrosion protection, heat dissipation, rapid prototyping, near net shapes, aesthetic coatings, and many other applications without the undesirable effects of process temperatures or metallurgical incompatibilities among materials.

Cold spray is capable of producing coatings or components made of metals, cermets, polymers, or composites. Its ability to prevent thermal effects such as oxidation, vaporization, melting, recrystallization, grain growth, and residual thermal stresses makes this new process unique for preserving the original characteristics of the feedstock materials. It is especially attractive for the processing of advanced industrial materials, such as those based on nanotechnology.
J. Villafuerte

Solid Wire vs. Metal Cored Wire: Which Should Be Used to
Optimize the Robotic Process?
Robotic welding systems are a fixture in industries where speed and repeatability are required to maintain a high volume of production. Companies invest large amounts of capital on robotics expecting a very fast payback and, in many cases, they achieve it. This return on investment can be attributed to both the robot itself and the welding consumable that is used. The automotive and metal fabrication industries, specifically, have become two of the biggest consumers for this technology.

The following is a classic robotic "widget" scenario: Acme Widgets runs welding consumable type A in its robotic welding cells and produces 500 parts per shift.
P. Cortina


Online Filler Metal Help
Whether we're writing procedures, inspecting welds, or purchasing filler metals, we all need to research data related to the selected filler material. There is free software out there to help welding engineers, inspectors, and buyers determine the necessary data. It is called fnumbers.com (www.fnumbers.com), and it is provided by C-spec, Concord, Calif.

Fnumbers.com
Industry's many ways of classifying filler metals can be a bit cumbersome at times. Fnumbers.com can make the process of referring to an American Welding Society (AWS) classification from a Unified Numbering System (UNS) number or a trade name, and finding F-numbers and A-numbers much easier — all it takes is a click of a mouse.
M. Mossman

Corrosion Testing of Austenitic Stainless Steel Weldments
There are significant differences in testing and evaluating the corrosion resistance of stainless steel welds compared to carbon steel, low-alloy steel, copper-based alloy, and aluminum alloy welds.

Some of the major differences in evaluating stainless steel are its susceptibility to severe intergranular attack (IGA), stress corrosion cracking (SCC), and crevice corrosion. Accurately testing for the susceptibility for each of these conditions has been problematic over the years.

Determining Corrosion Behavior Is Not Easy
The common practice of assuming that weight loss is relatively uniform over the full area of the specimen in calculating a corrosion rate is reasonable for carbon steel and other materials, but results in unusually low and misleading corrosion rates for stainless steel. This is due to the fact that corrosion of stainless steel is typically not uniform, but highly localized.
A. H. Tuthill


THE AMERICAN WELDER

Obelisk Stands Sentry to Honor Heroes
M. R. Johnsen

School Builds Its Reputation on Students' Successes
A. R. Neilson

Temperature-Indicating Methods Are Tested
R. K. Wiswesser

Selecting the Right Type of Portable Wire Feeder
M. Vandenberg


WELDING RESEARCH SUPPLEMENT

*An Experimental Study Determines the Electrical Contact Resistance in Resistance Welding (.pdf)
A parametric study was carried out on a Gleeble™ machine to evaluate the influence of pressure, temperature, and metal properties on resistance welding
Q. Song et al.

*Microstructural Characterization of a Double-Sided Friction Stir Weld on a Superaustenitic Stainless Steel (.pdf)
Results from various characterization techniques were used to describe formation of different microstructural zones in friction stir welded AL-6XN
S. Klingensmith et al.

Departments

Press Time News

Editorial

News of the Industry

Book Review

Stainless Q&A

Letters to the Editor

CyberNotes

Technology

New Products

Coming Events

Conferences

Society News

Guide to AWS Services

Navy Joining Center

New Literature

Personnel

The American Welder

  Fact Sheet

  Welding Project

  Keep It Safe

Classifieds (in pdf)

Advertiser Index

Welding Journal (ISSN 0043-2296) is published monthly by the American Welding Society for $90.00 per year in the United States and possessions, $130 per year in foreign countries: $6.00 per single issue for AWS members and $8.00 per single issue for nonmembers. American Welding Society is located at 550 NW LeJeune Rd., Miami, FL 33126-5671; telephone (305) 443-9353. Periodicals postage paid in Miami, Fla., and additional mailing offices. POSTMASTER: Send address changes to Welding Journal, 550 NW LeJeune Rd., Miami, FL 33126-5671.

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