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Articles tagged with "porosity"

Results: 8

	Don't rule out plasma for cutting aluminum: Clearing up the misconceptions By: Michael Bishop, Contributing Writer In any discussion about how to cut metal, plasma cutting is right up there with laser and waterjet. The technology gets a bad rap, though, when the discussion turns to cutting aluminum. There are five preconceptions that many fabricators have about turning to plasma to cut aluminum. But according to three experts, new plasma cutting systems produce good results on aluminum. Publish date: January 27, 2009 Tech cell: Plasma Cutting
	Finding poor-diffusion bonds in ferrous, nonferrous tubes: Pursuing, preventing pasty welds By: John Wallace Determining whether a tube seam has a partial bond can be difficult with standard ultrasonic or eddy current techniques. However, multifrequency, probe-based eddy current equipment can detect poor-diffusion bonds in nonferrous materials. Using a penetrating field to reflect a signal off the planar structure of the weld works on ferrous materials. Publish date: December 11, 2007 Tech cell: Testing and Measuring
	Finding seemingly insignificant flaws: Array By: Richard L. Fisher Array Publish date: Array Tech cell: Testing and Measuring
	Finding seemingly insignificant flaws Part II: Part II: Coil selection, equipment location, system implementation By: Richard L. Fisher Eddy current testing does more than detect product defects. When used with a proper monitoring system on a mill staffed by highly trained operators, it can help to optimize the mill's efficiency. The first part of this two-part article covers eddy current system principles. Publish date: July 17, 2009 Tech cell: Testing and Measuring
	Arc welding discontinuities By: Elia Levi, Contributing Writer Welding discontinuities can affect product performance and longevity. Thoroughly understanding the various defects, their causes, severity, and remedies can help ensure high-quality and superior performance. This article presents an overview of welding defects and discusses design strategies to help prevent them. Publish date: July 11, 2006 Tech cell: Arc Welding
	Great welds need the right gas By: Bill Giese, Contributing Writer Using an inappropriate gas mixture and consumables for a particular GMAW application can cause porosity and excessive spatter, factors that diminish weld quality. Which gases work best with which materials? Why is nozzle selection important? This article addresses these and other questions about GMAW gas and consumables. Publish date: August 22, 2007 Tech cell: Arc Welding
	SMAW: A welder's guide: Advice and troubleshooting tips for beginners By: Harry Sadler Array Publish date: Array Tech cell: Arc Welding
	SMAW: A welder's guide - Advice and troubleshooting tips for beginners Shielded metal arc welding (SMAW) is the most common form of arc welding. However, creating a good weld is not always easy, especially for a beginner. Following a few simple tips as well as learning the common weld defect and how to fix them will have you on your way to laying quality SMAW welds. Publish date: September 1, 2009 Tech cell: Arc Welding