Latest from Issues and Ideas

F11photo | Dreamstime
The Liberty Bell, Philadelphia.
Natalie Schorr | Dreamstime
U.S. Steel signage, Edgar Thomson Works, Braddock, Penn.
Thossaphol Somsri | Dreamstime
Gas turbine-powered electric utility plant.
Smoczyslaw | Dreamstime
Copper wire in an electric motor assembly.
Pennsylvania State University
Concept for AM-produced shape-memory-alloy (SMA) radiator .
Ilja Enger Tsizikov | Dreamstime
Transmission towers and electrical substation, at sunset.
Andrey Popov | Dreamstime
Illustrated digital human hand and businessman, arm wrestling.
Pratt & Whitney
Engine assembly at Pratt & Whitney in Middletown, Conn.

Applying Pressure Over the Riser Reduces Porosity

Nov. 30, 2005
Research shows how porosity forms in aluminum castings, and devises a test that demonstrates how a combination of pressure and core surface shape may improve casting ...

Research shows how porosity forms in aluminum castings, and devises a test that demonstrates how a combination of pressure and core surface shape may improve casting quality.