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Title: Creep Behavior of a New Cast Austenitic Alloy

Abstract

A new cast austenitic alloy, CF8C-Plus, has been developed by Oak Ridge National Laboratory (ORNL) and Caterpillar for a wide range of high temperature applications including diesel exhaust components and turbine casings. The creep strength of the CF8C-Plus steel is much greater than that of the standard cast CF8C stainless steel and is comparable to the highest strength wrought commercial austenitic stainless steels and alloys, such as NF709. The creep properties of CF8C-Plus are discussed in terms of the alloy design methodology and the evaluation of some long-term creep tested specimens (over 20,000 hours). Microcharacterization shows that the excellent creep strength is due mainly to the precipitation of very fine nano-scale and stable MC carbides, without the formation of deleterious intermetallic phases.

Authors:
 [1];  [1];  [1];  [2]
  1. ORNL
  2. Caterpillar Technical Center
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
931256
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: International Journal of Pressure Vessels and Piping; Journal Volume: 84
Country of Publication:
United States
Language:
English
Subject:
creep; austenitic alloys; stainless steels; castings; engineered microstructure; MC carbides

Citation Formats

Shingledecker, John P, Maziasz, Philip J, Evans, Neal D, and Pollard, Michael J. Creep Behavior of a New Cast Austenitic Alloy. United States: N. p., 2007. Web. doi:10.1016/j.ijpvp.2006.09.014.
Shingledecker, John P, Maziasz, Philip J, Evans, Neal D, & Pollard, Michael J. Creep Behavior of a New Cast Austenitic Alloy. United States. doi:10.1016/j.ijpvp.2006.09.014.
Shingledecker, John P, Maziasz, Philip J, Evans, Neal D, and Pollard, Michael J. Mon . "Creep Behavior of a New Cast Austenitic Alloy". United States. doi:10.1016/j.ijpvp.2006.09.014.
@article{osti_931256,
title = {Creep Behavior of a New Cast Austenitic Alloy},
author = {Shingledecker, John P and Maziasz, Philip J and Evans, Neal D and Pollard, Michael J},
abstractNote = {A new cast austenitic alloy, CF8C-Plus, has been developed by Oak Ridge National Laboratory (ORNL) and Caterpillar for a wide range of high temperature applications including diesel exhaust components and turbine casings. The creep strength of the CF8C-Plus steel is much greater than that of the standard cast CF8C stainless steel and is comparable to the highest strength wrought commercial austenitic stainless steels and alloys, such as NF709. The creep properties of CF8C-Plus are discussed in terms of the alloy design methodology and the evaluation of some long-term creep tested specimens (over 20,000 hours). Microcharacterization shows that the excellent creep strength is due mainly to the precipitation of very fine nano-scale and stable MC carbides, without the formation of deleterious intermetallic phases.},
doi = {10.1016/j.ijpvp.2006.09.014},
journal = {International Journal of Pressure Vessels and Piping},
number = ,
volume = 84,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}