CF8C-Plus: A New High Temperature Austenitic Casting for Advanced Power Systems

Journal Article · Sun Jan 01 04:00:00 EST 2006 · Energy Materials: Materials Science & Engineering for Energy Systems

DOI:https://doi.org/10.1179/174892306X99697· OSTI ID:1003298

Shingledecker, John P ^[1]; Maziasz, Philip J ^[1]; Evans, Neal D ^[1]; Santella, Michael L ^[1]

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1. ORNL

A new cast austenitic stainless steel, CF8C plus, has been developed by Oak Ridge National Laboratory and Caterpillar for a wide range of transportation and energy applications. CF8C plus steel has improved high temperature tensile, creep, fatigue, and creep-fatigue properties compared with standard CF8C steel. Changes to the CF8C steel composition, including additions of Mn and N, result in changes to the solidification behaviour and final microstructure of the alloy, which directly relate to the improved mechanical properties. Additionally, CF8C plus is a relatively inexpensive steel which exhibits good castability. The mechanical properties of the alloy have generated significant interest for the production/design of cast components for diesel engine turbochargers and other exhaust components, natural gas reciprocating engines for distributed power, and turbine end covers and casings for land based turbines. In the present paper, the microstructural evolution of CF8C and CF8C plus are presented in more detail, and the mechanical properties of the alloys are compared with each other and other engineering alloys.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: EE USDOE - Office of Energy Efficiency and Renewable Energy (EE)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1003298
• Journal Information: Energy Materials: Materials Science & Engineering for Energy Systems, Journal Name: Energy Materials: Materials Science & Engineering for Energy Systems Journal Issue: 1 Vol. 1; ISSN 1748-9237; ISSN 1748-9245
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
24 POWER TRANSMISSION AND DISTRIBUTION
33 ADVANCED PROPULSION SYSTEMS
36 MATERIALS SCIENCE
ALLOYS
CASTING
CREEP
DIESEL ENGINES
ENGINES
MECHANICAL PROPERTIES
MICROSTRUCTURE
NATURAL GAS
ORNL
POWER SYSTEMS
SOLIDIFICATION
STAINLESS STEELS
STEELS
TURBINES
TURBOCHARGERS