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Synthesis of Al-rich bulk metallic glass composites by warm extrusion of gas atomized powders
J. Q. Wang; P. Dong; W. L. Hou; X. C. Chang; M. X. Quan
2013
Source PublicationJournal of Alloys and Compounds
ISSN0925-8388
Volume554Pages:419-425
AbstractCentimeter-scale Al85Ni5Y6Co2Fe2 bulk metallic glass composites were fabricated by warm extrusion of gas-atomized amorphous powders. Thermal behavior and microstructure of both the starting powders and the extruded samples formed with different extrusion ratios were studied in detail. The viscosity dependence of the powders on temperature was analyzed by calculation. The result demonstrated that the viscosity decreases steeply near the glass transition temperature and the minimum viscosity value calculated is about 1.37 x 10(8) Pa s at 550 K. Those have been confirmed by the viscous flow in warm extrusion around such a temperature. The compacts consolidated at 550 K under various extrusion ratios from 6.8 to 15.7 yielded nanostructured alpha-Al/glassy matrix composites with high hardness. The appearance of such a devitrified structure is thought to be related to the deformation-induced temperature rise during extrusion. (C) 2012 Elsevier B. V. All rights reserved.
description.department[wang, j. q. ; dong, p. ; hou, w. l. ; chang, x. c. ; quan, m. x.] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. [dong, p.] shanxi taigang stainless steel co ltd, taiyuan 030003, peoples r china. ; wang, jq (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. ; jqwang@imr.ac.cn
KeywordAl-rich Metallic Glass Extrusion Microstructure Calorimetry Amorphous-alloys Large Plasticity High-strength Microstructure Formability Stability Aluminum Systems Phase La
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/71534
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
J. Q. Wang,P. Dong,W. L. Hou,et al. Synthesis of Al-rich bulk metallic glass composites by warm extrusion of gas atomized powders[J]. Journal of Alloys and Compounds,2013,554:419-425.
APA J. Q. Wang,P. Dong,W. L. Hou,X. C. Chang,&M. X. Quan.(2013).Synthesis of Al-rich bulk metallic glass composites by warm extrusion of gas atomized powders.Journal of Alloys and Compounds,554,419-425.
MLA J. Q. Wang,et al."Synthesis of Al-rich bulk metallic glass composites by warm extrusion of gas atomized powders".Journal of Alloys and Compounds 554(2013):419-425.
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