J.X. Zhang
,
YF. Zheng
,
W .Cai and L. C. Zhao (School of Materials Science and Engineering
,
Harbin Institute of Technology
,
Harbin 150001
,
China Laboratory of Atomic Imaging of Solids
,
Institute of Metal Research
,
Chinese Academy of Sciences
,
Shenyang 110015
,
China )
金属学报(英文版)
The A/D type twin boundary in a Cu-Zn-Al shape memory alloy appears curved under TEM and shows impularly sermted steps under HREM Crystallogmphic analysis shows that the macroscopic curve results hem non-selfaccommodation of the boundary, the deviation from exact twin orientation and a pwtrential orientation for lower boundary enerpy.
关键词:
shape memory alloy
,
null
,
null
J.X. Zhang
,
D.M. Liu
,
Y.Q. Liu
,
M.L. Zhou
,
T.Y. Zuo
金属学报(英文版)
The mechanical properties of molybdenum wires doped with different contents of La2O3 were investigated systematically and the interaction between La2O3 particles with dislocations in Mo- La2O3 wires were observed by SEM and TEM. It is shown that Mo-La2O3 wires possess much higher tensile strength than the pure Mo. In wires the dislocation motion is strongly hindered by La2O3 particles, which remains up to much higher temperature. Moreover, a number of prismatic dislocation loops and hexagonal dislocation network have been formed in annealed Mo-La2O3 wires. The higher strength of Mo-La2O3 than the pure Mo is attributed to the La2O3 particles dispersion strengthening and dislocation strengthening.
关键词:
molybdenum
,
null
,
null
