Dislocations in ambient temperature creep of HCP metals

被引：0
|
作者：
Matsunaga, Tetsuya [1 ,2 ]
Sato, Eiichi [1 ]
Kuribayashi, Kazuhiko [2 ]
机构：
[1] Japan Aerosp Explorat Agcy, Inst Space & Aeronaut Studies, 3-1-1 Yoshinodai, Kanagawa 2298510, Japan
[2] Univ Tokyo, Bunkyo Ku, Tokyo 1138656, Japan
来源：
INNOVATIONS IN TITANIUM TECHNOLOGY | 2007年
关键词：
ambient temperature creep; HCP metals; TEM;
D O I：
暂无
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Metals with a hexagonal closed packed (HCP) structure show creep behavior at ambient temperature. Features of this phenomenon are: (1) it appears in all and only HCP structure metals and alloys; (2) dislocations are contributing; and (3) it shows very low apparent activation energy (ca. 10 kJ/mol). Transmission electron microscope (TEM) observation was conducted on crept specimens of commercially pure Ti (CP-Ti), pure Mg, and Zn. Results showed no dislocation tangle. The dislocation arrays were aligned straightly inside the grain. The dislocation array consisted of one dislocation type. One slip system was activated in the ambient temperature creep condition. Therefore, it was considered that work hardening does not occur, and that creep deformation continued.
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页码：227 / +
页数：2
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