American Welding Society ...

Site Offers More than a Nickel's Worth
Nickel Institute. Among the offerings on this comprehensive Web site are engineering details on nickel alloys, research data on human and environmental exposures, and information on recycling and sustainable development. The site is easy to navigate and to search. It features a "Technical Support" section that includes 375 technical papers available free of charge: 91 are in character-based PDF format and are searchable by keyword, another 94 are in "bit map" PDF format, and the balance are available only as printed editions that can be ordered for delivery by mail. Included in those are seven downloadable papers on welding and fabrication. These include Guidelines for Welding Dissimilar Metals, Guidelines for the Welded Fabrication of Nickel-Containing Stainless Steels for Corrosion-Resistant Services, Fabrication and Postfabrication Cleanup of Stainless Steels, and Welding of Stainless Steels and Other Joining Methods.

In addition, visitors can read articles from recent issues of Nickel magazine. An article titled "Unconventional Welding," by Dean Jobb, which appeared in the July 2004 issue, discusses welding of dissimilar metals for the aerospace industry. An excerpt is reprinted here: "If the aerospace industry is to reach its goals of reducing emissions and lessening its burden on the environment, the next generation of jet engines will need to burn fuel more efficiently and at higher temperatures. But building engine components capable of doing so poses a technological challenge: while nickel-based superalloys offer the heat resistance needed, they are difficult to join using conventional welding techniques.

"Engineers at the University of Manchester and Rolls-Royce plc, one of the world's largest manufacturers of gas turbines for aircraft, have teamed up to tackle this problem by applying inertia welding techniques to the production of compressor drums, turbine discs, and shafts for jet engines. 'Inertia welding has been around for some time,' notes Prof. Philip Withers of the university's Materials Science Centre. 'What's new is inertia welding as applied to aero-engines.'

"Inertia welding uses the heat generated by friction to fuse metal components together. A workpiece is spun at high speed on a flywheel and brought into contact with a stationary component. Within seconds, the pieces reach forging temperature at the point of contact and are bonded together without melting or the addition of liquid metal."

Site Highlights Metalforming Products
Pacific Press Technologies. This comprehensive Web site offers extensive product information on the Mt. Carmel, Ill.-, based company's line of hydraulic C-frame and straightside presses, press brakes, production shears, compression molding presses, and other pressworking equipment. It includes a "Customer Testimonials" section featuring five application stories. If visitors can't take the time to read the entire testimonial, a handy boxed section lists the customer's name and location, the products/markets it serves, statement of the problem it had and the solution it used, and downloadable brochures about the products involved.

The site also includes descriptions of the press maker's capabilities and services, a complete set of literature and other marketing materials, news releases, and dealer locations. The listing of company employees includes their names, titles, phone numbers, and e-mail

Sound and Vibration Measurement Featured
The Modal Shop, Inc. This Web site provides an overview of the company's line of application software and hardware for dynamic sound and vibration measurement in manufacturing environments. Included are descriptions of the company's products, which include a digital signal processor, a machine vibration monitoring unit, and vibration sensors. Visitors can locate their closest sales representative by typing in their postal zip code or view examples of cost savings and improvements the company's customers have realized on the "Dynamic Quality Overview" page. The site also includes four discussion forums related to general sound and vibration applications or specific products. In addition, the site explains the NDT-RAM™ inspection system, which can be used for part quality testing for powdered metal and castings. Included is a downloadable technical paper explaining the resonant acoustic method (RAM) of nondestructive examination. According to the abstract, "RAM NDT tests, reports, and screens for most common part flaws in a manner similar to the way NASA tests flight hardware and automotive manufacturers validate their new car designs. Utilizing structural dynamics and statistical variation, RAM NDT provides mature, laboratory-proven technology in a robust, economical, process-friendly manner."