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Title: Cyclic Oxidation Behavior of Ni-Cr Alloys in Wet Air (C2018-11233)

Abstract

For automotive exhaust valve applications, future vehicles will need durable materials operating at higher temperatures. Both commercial and model Ni-based alloys were tested in 1-h cycles at 800-950°C in wet air, and the oxide scales formed on wrought Ni-(14-25)wt%Cr binary alloys were characterized to fundamentally understand the behavior of chromia-forming alloys. The mass change curves were used to quantify the behavior of the tested alloys and fit growth and spallation rates using kp-p model. With the fitted kp and p values, the effect of alloy composition on oxidation behavior was analyzed by a machine learning approach using these rates as inputs. The machine learning analysis yielded a high accuracy for kp but not p. The future goal is to develop a predictive model for oxidation behavior to assist in alloy development for this application.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. ORNL
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:
1436050
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: NACE Corrosion 2018 - Phoenix, Arizona, United States of America - 4/15/2018 8:00:00 AM-4/19/2018 8:00:00 AM
Country of Publication:
United States
Language:
English

Citation Formats

Jun, Jiheon, Pint, Bruce A., Shin, Dongwon, and Haynes, James A. Cyclic Oxidation Behavior of Ni-Cr Alloys in Wet Air (C2018-11233). United States: N. p., 2018. Web.
Jun, Jiheon, Pint, Bruce A., Shin, Dongwon, & Haynes, James A. Cyclic Oxidation Behavior of Ni-Cr Alloys in Wet Air (C2018-11233). United States.
Jun, Jiheon, Pint, Bruce A., Shin, Dongwon, and Haynes, James A. Sun . "Cyclic Oxidation Behavior of Ni-Cr Alloys in Wet Air (C2018-11233)". United States.
@article{osti_1436050,
title = {Cyclic Oxidation Behavior of Ni-Cr Alloys in Wet Air (C2018-11233)},
author = {Jun, Jiheon and Pint, Bruce A. and Shin, Dongwon and Haynes, James A.},
abstractNote = {For automotive exhaust valve applications, future vehicles will need durable materials operating at higher temperatures. Both commercial and model Ni-based alloys were tested in 1-h cycles at 800-950°C in wet air, and the oxide scales formed on wrought Ni-(14-25)wt%Cr binary alloys were characterized to fundamentally understand the behavior of chromia-forming alloys. The mass change curves were used to quantify the behavior of the tested alloys and fit growth and spallation rates using kp-p model. With the fitted kp and p values, the effect of alloy composition on oxidation behavior was analyzed by a machine learning approach using these rates as inputs. The machine learning analysis yielded a high accuracy for kp but not p. The future goal is to develop a predictive model for oxidation behavior to assist in alloy development for this application.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {4}
}

Conference:
Other availability
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