TY - JOUR
T1 - Tribochemistry of inconel 617 during sliding contact at 950 °C under helium environment for nuclear reactors
AU - Rahman, Md Saifur
AU - Polychronopoulou, Kyriaki
AU - Polycarpou, Andreas A.
N1 - Funding Information:
This study is supported by the U.S. Department of Energy under NEUP Project 16-10732 . The authors would like to thank Dr. R. Wright of Idaho National Laboratory, Dr. S. Sham of Argonne National Laboratory and Dr. Y. Wang of Oak Ridge National Laboratory (ORNL) for providing samples and useful data as well as helpful discussions. The EDS data shown in Fig. 7 were obtained by Dr. X. Zhang of Purdue University, and the TOF-SIMS data in Fig. 10 by Dr. S. Verkhoturov, Texas A&M. Use of the Texas A&M Materials Characterization Facility is acknowledged.
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/8/1
Y1 - 2019/8/1
N2 - The present study, discusses the tribochemistry on the surfaces of Inconel 617 following tribological studies performed in He and air atmospheres at 950 °C. In the case of He atmosphere, uncoupling of the chemical and mechanical (wear) contributions was attained by performing aging experiments (namely heat treatment in He under 950 °C). In the case of tribo-experiments at 950 °C, studies of the surface inside and outside the wear track of the alloy using different microscopy and spectroscopy tools, along with pin-on-disk tribology experiments were employed. Under all conditions studied, the COF and wear were higher in He environment, compared to air atmosphere. For example, at 5 N normal load, 0.04 m/s sliding velocity, and temperature of 950 °C the COF was 0.45 in air and 1.4 in He. The formation and evolution of the metal oxides formed is tracked and discussed herein, as well as their contribution to tribochemistry, which plays a critical role in determining friction and wear performance of the alloy, especially at high temperature.
AB - The present study, discusses the tribochemistry on the surfaces of Inconel 617 following tribological studies performed in He and air atmospheres at 950 °C. In the case of He atmosphere, uncoupling of the chemical and mechanical (wear) contributions was attained by performing aging experiments (namely heat treatment in He under 950 °C). In the case of tribo-experiments at 950 °C, studies of the surface inside and outside the wear track of the alloy using different microscopy and spectroscopy tools, along with pin-on-disk tribology experiments were employed. Under all conditions studied, the COF and wear were higher in He environment, compared to air atmosphere. For example, at 5 N normal load, 0.04 m/s sliding velocity, and temperature of 950 °C the COF was 0.45 in air and 1.4 in He. The formation and evolution of the metal oxides formed is tracked and discussed herein, as well as their contribution to tribochemistry, which plays a critical role in determining friction and wear performance of the alloy, especially at high temperature.
KW - Helium tribology
KW - Inconel 617
KW - Nuclear reactor
KW - Sliding wear
KW - Tribochemistry
UR - http://www.scopus.com/inward/record.url?scp=85065021729&partnerID=8YFLogxK
U2 - 10.1016/j.jnucmat.2019.04.032
DO - 10.1016/j.jnucmat.2019.04.032
M3 - Article
AN - SCOPUS:85065021729
SN - 0022-3115
VL - 521
SP - 21
EP - 30
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
ER -