Consolidation of nanocrystalline Al-5 at.% Ti alloy powders by ultra high-pressure hot pressing

被引：14

作者：

Moon, KI ^{[1
]}

Park, HS ^{[1
]}

Lee, KS ^{[1
]}

机构：

[1] Hanyang Univ, Dept Met Engn, Seoul 133791, South Korea

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2002年 / 323卷 / 1-2期

关键词：

nanocrystalline Al-5 at.% Ti; ultra high-pressure consolidation; abnormal grain growths; low temperature consolidation;

D O I：

10.1016/S0921-5093(01)01388-0

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Consolidation behavior of nanocrystalline Al-5 at.% Ti powders has been investigated by using ultra high-pressure hot pressing method. Nanocrystalline Al-5 at.%, Ti compacts with full density were successfully processed by hot pressing for 250 s at 120degreesC under 4.8 GPa with a grain size less than 50 nm. It is considered that each grain in as-compacted materials maintained random orientation with respect to its neighboring grains. The consolidation temperature, 120degreesC, is about 300-400degreesC lower than conventional one. Abnormal grain growth was observed in specimens prepared at temperature over 300degreesC, which was over one half of the absolute melting temperature of Al. Some grains grew up over 500 nm in these specimens. Rockwell hardness and Vickers micro-hardness values of the specimen prepared by the proper conditions were 105.2HR(B) and 243.7H(V), respectively. This hardness value was one of the highest one ever obtained in Al-5 at.% Ti alloys. (C) 2002 Elsevier Science, B.V. All rights reserved.

引用

页码：293 / 300

页数：8

共 28 条

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