Automatic Website Traffic RSS

Novel weld filler could solve hydrogen-induced cracking in energy applications - Power Engineering

Oak Ridge National Laboratory materials scientists operate a welding robot inside a robotic welding cell. Credit: Carlos Jones/ORNL, U.S. Dept. of Energy The U.S. Departments of Energy and Defense ... read more

TAINTED WIRE IS BLAMED FOR CRACKS IN SUB – Hartford Courant

Tainted welding wire is one reason for microscopic cracking in the partially completed hull of the nation’s first Seawolf submarine, causing the work to be scrapped at a cost that could exceed ... read more

New welding process coming to ANAD - The United States Army

"It will mostly eliminate hydrogen embrittlement, or hydrogen cracking," said Randall Holbrook, a depot welding supervisor. "Hydrogen cracking happens when you get water vapor in the metal while ... read more

Using Temperature- Measuring Indicators - POWER Magazine

Root cracks, toe cracks, under-bead cracks, and transverse cracks are all common, given sufficient thermal stress and the presence of hydrogen. In welding these materials, it is important to keep ... read more

Slipped through the cracks: How highway authorities missed the flaw that nearly brought down the I-40 bridge - Arkansas Times

The cracks were caused by hydrogen gas building up in the weld metal, a common problem that can be mitigated by practices such as pre-heating the base metal before welding. read more

Experts say dilbit could have created pressure swings, hydrogen cracks in Pegasus rupture

In the five months since ExxonMobil’s Pegasus oil pipeline burst in Arkansas, two things have become clear. Flawed, 1940s-era welding techniques used when the Pegasus was built set the stage for ... read more

NASA plans to weld shuttle cracks - New Scientist

Cracks measuring up to eight millimetres were found in metal linings that regulate the flow of super-cold hydrogen fuel. The cracks may have developed a number of years ago, but NASA fears a piece ... read more