TY - GEN
T1 - Dislocations in ambient temperature creep of HCP metals
AU - Matsunaga, Tetsuya
AU - Sato, Eiichi
AU - Kuribayashi, Kazuhiko
PY - 2007/12/1
Y1 - 2007/12/1
N2 - 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.
AB - 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.
KW - Ambient temperature creep
KW - HCP metals
KW - TEM
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M3 - Conference contribution
AN - SCOPUS:53849099322
SN - 9780873396653
T3 - TMS Annual Meeting
SP - 227
EP - 232
BT - Innovations in Titanium Technology - TMS 2007 Annual Meeting and Exhibition
T2 - Innovations in Titanium Technology
Y2 - 25 February 2007 through 1 April 2007
ER -