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Title: Age hardening and creep resistance of cast Al–Cu alloy modified by praseodymium

Abstract

The effects of praseodymium on age hardening behavior and creep resistance of cast Al–Cu alloy were investigated. The results indicated that praseodymium facilitated the formation of the θ′ precipitates during the age process and improved the hardness of the Al–Cu alloy. Besides, praseodymium resulted in the formation of the Al{sub 11}Pr{sub 3} phase in the grain boundaries and among the dendrites of the modified alloy. Because of the good thermal stability of Al{sub 11}Pr{sub 3} phase, it inhibits grain boundary migration and dislocation movement during the creep process, which contributes to the improvement in the creep resistance of the modified alloy at elevated temperatures. - Highlights: • Pr addition enhances the hardness and creep resistance of the Al–Cu alloy. • Pr addition facilitates the formation of the θ′ precipitates. • Pr addition results in the formation of the Al11Pr3 phase in the Al–Cu alloy.

Authors:
; ; ; ;
Publication Date:
OSTI Identifier:
22288701
Resource Type:
Journal Article
Journal Name:
Materials Characterization
Additional Journal Information:
Journal Volume: 86; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1044-5803
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; AGE HARDENING; ALUMINIUM ALLOYS; CREEP; GRAIN BOUNDARIES; HARDNESS; PRASEODYMIUM

Citation Formats

Bai, Zhihao, Qiu, Feng, Wu, Xiaoxue, Liu, Yingying, and Jiang, Qichuan. Age hardening and creep resistance of cast Al–Cu alloy modified by praseodymium. United States: N. p., 2013. Web. doi:10.1016/J.MATCHAR.2013.10.016.
Bai, Zhihao, Qiu, Feng, Wu, Xiaoxue, Liu, Yingying, & Jiang, Qichuan. Age hardening and creep resistance of cast Al–Cu alloy modified by praseodymium. United States. https://doi.org/10.1016/J.MATCHAR.2013.10.016
Bai, Zhihao, Qiu, Feng, Wu, Xiaoxue, Liu, Yingying, and Jiang, Qichuan. 2013. "Age hardening and creep resistance of cast Al–Cu alloy modified by praseodymium". United States. https://doi.org/10.1016/J.MATCHAR.2013.10.016.
@article{osti_22288701,
title = {Age hardening and creep resistance of cast Al–Cu alloy modified by praseodymium},
author = {Bai, Zhihao and Qiu, Feng and Wu, Xiaoxue and Liu, Yingying and Jiang, Qichuan},
abstractNote = {The effects of praseodymium on age hardening behavior and creep resistance of cast Al–Cu alloy were investigated. The results indicated that praseodymium facilitated the formation of the θ′ precipitates during the age process and improved the hardness of the Al–Cu alloy. Besides, praseodymium resulted in the formation of the Al{sub 11}Pr{sub 3} phase in the grain boundaries and among the dendrites of the modified alloy. Because of the good thermal stability of Al{sub 11}Pr{sub 3} phase, it inhibits grain boundary migration and dislocation movement during the creep process, which contributes to the improvement in the creep resistance of the modified alloy at elevated temperatures. - Highlights: • Pr addition enhances the hardness and creep resistance of the Al–Cu alloy. • Pr addition facilitates the formation of the θ′ precipitates. • Pr addition results in the formation of the Al11Pr3 phase in the Al–Cu alloy.},
doi = {10.1016/J.MATCHAR.2013.10.016},
url = {https://www.osti.gov/biblio/22288701}, journal = {Materials Characterization},
issn = {1044-5803},
number = ,
volume = 86,
place = {United States},
year = {2013},
month = {12}
}