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Articles tagged with "crystal"

Results: 6

Choosing the right coated abrasive for plate finishing applications: A look at grain properties

Most plate fabricating companies need to select a coated abrasive to finish their parts. This selection process can be intimidating, as well as confusing, because so many types of coated abrasives are available.

Publish date: January 29, 2004

Tech cell: Finishing


The structure of metal

Let's start with the obvious: Molten metals have no particular structure. The atoms that make up that metal are just whipping around helter-skelter—at a high rate of speed—with no real orderly, defined pattern.

Publish date: April 24, 2003

Tech cell: Metals/Materials


Phases, structures, and the influences of temperature

When you heat or cool a piece of metal to a specific temperature, that metal goes through what's called a phase change, in which its crystal structure changes. Sometimes the change is obvious. For example, when a piece of metal melts, it goes through a phase change when the crystal structure breaks down and the metal goes from solid to liquid. When it solidifies it's also a phase change, as the structure re-forms from liquid to solid.

Publish date: June 26, 2003

Tech cell: Metals/Materials


Making steels stronger

When it comes to modifying a steel's strength and hardness, it's important to not confuse hardness with hardenability and remember that hardenability characteristics are important because they help identify how much a specific steel will harden during welding.

Publish date: October 9, 2003

Tech cell: Metals/Materials


One system does not fit all: Ventilation equipment becomes more specific to improve the welding environment

Ventilation systems come in a variety of types for different types of welding processes and varying fabrication facility setups. The emphasis on proper application of these systems and best use of the components used in them comes from an increased interest in cleaner air for the welder.

Publish date: January 13, 2004

Tech cell: Safety


Radiographic and ultrasonic weld inspection: Establishing weld integrity without destroying the component

This article outlines the differences in radiographic and ultrasonic weld inspection, the two most common methods if nondestructive testing. It gives an overview of both methods, including how they are used.

Publish date: December 13, 2001

Tech cell: Welding Inspection