Superplastic forming of stainless steel automotive components

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Description

Exhaust emission standards are governmentally controlled standards, which are increasingly stringent, forcing alternate strategies to meet these standards. One approach to improve the efficiency of the exhaust emission equipment is to decrease the time required to get the catalytic converter to optimum operating temperature. To accomplish this, automotive manufacturers are using double wall stainless steel exhaust manifolds to reduce heat loss of the exhaust gases to the converter. The current method to manufacture double wall stainless steel exhaust components is to use a low-cost alloy with good forming properties and extensively form, cut, assemble, and weld the pieces. Superplastic forming ... continued below

Physical Description

8 p.

Creation Information

Bridges, B.; Elmer, J. & Carol, L. February 6, 1997.

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This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this report can be viewed below.

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Authors

  • Bridges, B. Lockheed Martin Energy Systems, Inc., Oak Ridge, TN (United States)
  • Elmer, J. Lawrence Livermore National Lab., CA (United States)
  • Carol, L. AC Delco Systems World Headquarters, Flint, MI (United States). USCAR Low Emissions Technology Research and Development Partnership

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Publisher

  • Oak Ridge Y-12 Plant
    Publisher Info: Oak Ridge Y-12 Plant, TN (United States)
    Place of Publication: Tennessee

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Description

Exhaust emission standards are governmentally controlled standards, which are increasingly stringent, forcing alternate strategies to meet these standards. One approach to improve the efficiency of the exhaust emission equipment is to decrease the time required to get the catalytic converter to optimum operating temperature. To accomplish this, automotive manufacturers are using double wall stainless steel exhaust manifolds to reduce heat loss of the exhaust gases to the converter. The current method to manufacture double wall stainless steel exhaust components is to use a low-cost alloy with good forming properties and extensively form, cut, assemble, and weld the pieces. Superplastic forming (SPF) technology along with alloy improvements has potential at making this process more cost effective. Lockheed Martin Energy Systems (LMES), Lawrence Livermore National Laboratory (LLNL) and USCAR Low Emission Partnership (LEP) worked under a Cooperative Research And Development Agreement (CRADA) to evaluate material properties, SPF behavior, and welding behavior of duplex stainless steel alloy for automotive component manufacturing. Battelle Pacific Northwest National Laboratory (PNNL) has a separate CRADA with the LEP to use SPF technology to manufacture a double wall stainless steel exhaust component. As a team these CRADAs developed and demonstrated a technical plan to accomplish making double wall stainless steel exhaust manifolds.

Physical Description

8 p.

Notes

OSTI as DE98052946

Source

  • Other Information: PBD: 6 Feb 1997

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Identifier

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  • Other: DE98052946
  • Report No.: Y/AMT--459
  • Grant Number: AC05-84OR21400
  • DOI: 10.2172/658226 | External Link
  • Office of Scientific & Technical Information Report Number: 658226
  • Archival Resource Key: ark:/67531/metadc703924

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • February 6, 1997

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

Description Last Updated

  • April 8, 2016, 5:58 p.m.

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Citations, Rights, Re-Use

Bridges, B.; Elmer, J. & Carol, L. Superplastic forming of stainless steel automotive components, report, February 6, 1997; Tennessee. (digital.library.unt.edu/ark:/67531/metadc703924/: accessed November 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.