研究了α钛在应力作用下的应变时效过程.指出应变时效动力学符合下式: 求出了应变时效的激活能为1.30±0.15电子伏特.认为α钛中的应变时效现象可能与替代式元素铁及间隙元素氧同时存在有关.
The strain ageing of a-titanium under the influence of an applied stress has been studied. The kinetics of strain ageing obeys the following equation where n=2,; is the increase in flow stress σ_f due to strain ageing; n_0 is the original concentration of solute; n_∞ is the maximum concentration of solute segregated in the dislocations; D is the diffusion coefficient of solute atoms; U_m is the binding energy between a solute atom and a dislocation; b is the Burgers vector; t is the ageing time, k Boltzmann constant and T the absolute temperature. The activation energy of strain ageing obtained is about 1.30±0.15 eV. The strain ageing of α-titanium is very probably due to the presence of both iron as the substitutional atoms and oxygen as the interstitial atoms.
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