A creep-resistant additively manufactured Al-Ce-Ni-Mn alloy

被引：102
作者：
Michi, Richard A. [1 ]
Sisco, Kevin [2 ]
Bahl, Sumit [1 ]
Yang, Ying [1 ]
Poplawsky, Jonathan D. [3 ]
Allard, Lawrence F. [1 ]
Dehoff, Ryan R. [4 ]
Plotkowski, Alex [1 ]
Shyam, Amit [1 ]
机构：
[1] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN USA
[2] Univ Tennessee, Dept Mech Aerosp & Biomed Engn, Knoxville, TN USA
[3] Ctr Nanophase Mat Sci, Oak Ridge Natl Lab, Oak Ridge, TN USA
[4] Oak Ridge Natl Lab, Mfg Sci Div, Oak Ridge, TN USA
来源：
ACTA MATERIALIA | 2022年 / 227卷
关键词：
Additive manufacturing; Aluminum alloys; High-temperature materials; Creep; Al-Ce-Ni-Mn alloy; MECHANICAL-PROPERTIES; DEFORMATION-BEHAVIOR; DISLOCATION CLIMB; THRESHOLD STRESS; CASTING ALLOYS; HARD PARTICLES; MICROSTRUCTURE; STRENGTH; MATRIX; SC;
D O I：
10.1016/j.actamat.2022.117699
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Existing additively manufactured aluminum alloys exhibit poor creep resistance due to coarsening of their strengthening phases and refined grain structures. In this paper, we report on a novel additively manufactured Al-10.5Ce-3.1Ni-1.2Mn wt.% alloy which displays excellent creep resistance relative to cast high-temperature aluminum alloys at 300-400 degrees C. The creep resistance of this alloy is attributed to a high volume fraction (similar to 35%) of submicron intermetallic strengthening phases which are coarsening-resistant for hundreds of hours at 350 degrees C. The results herein demonstrate that additive manufacturing provides opportunities for development of creep-resistant aluminum alloys that may be used in bulk form in the 250-400 degrees C temperature range. Pathways for further development of such alloys are identified. (c) 2022 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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页数：17
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