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Title: High performance aluminum–cerium alloys for high-temperature applications

Abstract

Light-weight high-temperature alloys are important to the transportation industry where weight, cost, and operating temperature are major factors in the design of energy efficient vehicles. Aluminum alloys fill this gap economically but lack high-temperature mechanical performance. Alloying aluminum with cerium creates a highly castable alloy, compatible with traditional aluminum alloy additions, that exhibits dramatically improved high-temperature performance. These compositions display a room temperature ultimate tensile strength of 400 MPa and yield strength of 320 MPa, with 80% mechanical property retention at 240 °C. A mechanism is identified that addresses the mechanical property stability of the Al-alloys to at least 300 °C and their microstructural stability to above 500 °C which may enable applications without the need for heat treatment. Lastly, neutron diffraction under load provides insight into the unusual mechanisms driving the mechanical strength.

Authors:
ORCiD logo [1]; ORCiD logo [1];  [2];  [3];  [3];  [3];  [3];  [3];  [3];  [3]; ORCiD logo [1]; ORCiD logo [1];  [4];  [3]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Eck Industries, Manitowoc, WI (United States)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  4. Ames Lab., Ames, IA (United States)
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1409366
Alternate Identifier(s):
OSTI ID: 1409991; OSTI ID: 1459318; OSTI ID: 1471937
Report Number(s):
IS-J-9497; LLNL-JRNL-728269
Journal ID: ISSN 2051-6347; MHAOAL
Grant/Contract Number:  
AC02-07CH11358; AC52-07NA27344; AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Materials Horizons
Additional Journal Information:
Journal Volume: 4; Journal Issue: 6; Journal ID: ISSN 2051-6347
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 29 ENERGY PLANNING, POLICY AND ECONOMY

Citation Formats

Sims, Zachary C., Rios, Orlando R., Weiss, David, Turchi, Patrice E. A., Perron, Aurelien, Lee, Jonathan R. I., Li, Tian T., Hammons, Joshua A., Bagge-Hansen, Michael, Willey, Trevor M., An, Ke, Chen, Yan, King, Alex H., and McCall, Scott K.. High performance aluminum–cerium alloys for high-temperature applications. United States: N. p., 2017. Web. doi:10.1039/C7MH00391A.
Sims, Zachary C., Rios, Orlando R., Weiss, David, Turchi, Patrice E. A., Perron, Aurelien, Lee, Jonathan R. I., Li, Tian T., Hammons, Joshua A., Bagge-Hansen, Michael, Willey, Trevor M., An, Ke, Chen, Yan, King, Alex H., & McCall, Scott K.. High performance aluminum–cerium alloys for high-temperature applications. United States. doi:10.1039/C7MH00391A.
Sims, Zachary C., Rios, Orlando R., Weiss, David, Turchi, Patrice E. A., Perron, Aurelien, Lee, Jonathan R. I., Li, Tian T., Hammons, Joshua A., Bagge-Hansen, Michael, Willey, Trevor M., An, Ke, Chen, Yan, King, Alex H., and McCall, Scott K.. Tue . "High performance aluminum–cerium alloys for high-temperature applications". United States. doi:10.1039/C7MH00391A. https://www.osti.gov/servlets/purl/1409366.
@article{osti_1409366,
title = {High performance aluminum–cerium alloys for high-temperature applications},
author = {Sims, Zachary C. and Rios, Orlando R. and Weiss, David and Turchi, Patrice E. A. and Perron, Aurelien and Lee, Jonathan R. I. and Li, Tian T. and Hammons, Joshua A. and Bagge-Hansen, Michael and Willey, Trevor M. and An, Ke and Chen, Yan and King, Alex H. and McCall, Scott K.},
abstractNote = {Light-weight high-temperature alloys are important to the transportation industry where weight, cost, and operating temperature are major factors in the design of energy efficient vehicles. Aluminum alloys fill this gap economically but lack high-temperature mechanical performance. Alloying aluminum with cerium creates a highly castable alloy, compatible with traditional aluminum alloy additions, that exhibits dramatically improved high-temperature performance. These compositions display a room temperature ultimate tensile strength of 400 MPa and yield strength of 320 MPa, with 80% mechanical property retention at 240 °C. A mechanism is identified that addresses the mechanical property stability of the Al-alloys to at least 300 °C and their microstructural stability to above 500 °C which may enable applications without the need for heat treatment. Lastly, neutron diffraction under load provides insight into the unusual mechanisms driving the mechanical strength.},
doi = {10.1039/C7MH00391A},
journal = {Materials Horizons},
number = 6,
volume = 4,
place = {United States},
year = {Tue Aug 01 00:00:00 EDT 2017},
month = {Tue Aug 01 00:00:00 EDT 2017}
}

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Works referenced in this record:

Reassessment of Al-Ce and Al-Nd binary systems supported by critical experiments and first-principles energy calculations
journal, December 2005

  • Gao, Michael C.; Ünlü, Necip; Shiflet, G. J.
  • Metallurgical and Materials Transactions A, Vol. 36, Issue 12, p. 3269-3279
  • DOI: 10.1007/s11661-005-0001-y