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TVA - Tennessee Valley Authority. Power companies fiercely opposed the TVA because they disliked the less expensive energy it offered and thought the agency posed a danger to free market.
A notched bar is broken in a pendulum-style impact tester to determine the ductile/brittle transition temperature for every specific steel sample. The energy absorbed during the fracture is then calculated. Steel 1045 specimens break apart when the temperature drops below zero and display brittle-like fracture (specimens 1 to 4 from -200oC to 0.0oC), however when the temperature rises, the specimens display ductile-like fracture (specimens 5 to 7 from 24oC to 100oC). Mild steel is malleable and ductile because it contains between 0.05 and 0.30 percent carbon. This steel has low carbon, with a carbon concentration of about 0.3%, making it neither overly brittle nor overly ductile. It is utilized practically everywhere since it is in the middle, which strikes a good balance. The Tennessee Valley Authority (TVA) is a U.S. electric utility company that is controlled by the federal government. All of Tennessee is included in TVA's service region, along with small portions of Georgia, North Carolina, Virginia, Alabama, and Mississippi. Despite being a governmental agency, TVA is run like a private for-profit business and does not receive any taxpayer money. Its headquarters are in Knoxville, Tennessee, and it is both the largest public utility and the sixth-largest power supplier in the nation.
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