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 Posted: Tue 17:37, 11 Jan 2011 Post subject: moncler günstig Has a layered two-phase microstru |
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Has a layered two-phase microstructure of the alloy creep TiAl/Ti3Al
From previous results it seems, TiA1/Ti. A1 layered Taijin excellent creep mechanism is unclear. To this end the two researchers BYw (B and W) recently analyzed the lamellar phase in TiA1 and 1iA1 creep hardening model using a composite basin of layered together to predict the steady-state creep rate. Through research, they get the following conclusions J. TiA1/TilA1 in the two-phase alloy creep deformation of layered, layered microstructure was observed within the lamellar microstructure TiAI ~ than the Tj: A1 phase at a higher rate to creep. 2. In the 1080K temperature up to 0.08 true strain,[link widoczny dla zalogowanych], subjected to compressive creep in layered alloys have not found the phenomenon of interfacial sliding. 3. The same stress and temperature compression tests to such differences include the existence of the layered microstructure in the hope to establish the composition of the equation physiognomy. 4. Composed of layered microstructures using a constant hardening coefficient phases, one in the composite creep strengthening mechanism based on the use of an integral equation to represent the creep rate of lamellar Taijin. This integral equation can be applied in the moderate range of temperature and stress the intrinsic value of the minimum creep rate predictions and experimental observations are well correlated between. In the discussion of these researchers also noted that in their study, TiA1 and TjA1 Taijin as a single phase or as a layered microstructure formed within the test phase on the creep behavior is reflected in the difference between using only strain hardening coefficient of a quantitative, said the TiA1 and TiA as the composition of the layered microstructure of the corresponding phase and as a house payment for single-phase activation energy in creep and stress the existence of any differences between indices are not considered,[link widoczny dla zalogowanych], This assumes that the value of these parameters will not be lamellar phase morphology significantly. They are discussing the end of that predicted and measured through the comparison of creep curves can be assumed that the above is a reasonable assumption. A25A (1994 group) P2 organizations 161IAI ~ ITisAtMetallM the form rTr into aas 【ate, the husband is about more than single-phase variable-rate and TiA1 I'iA1 creep speed. V01. . . Factory,[link widoczny dla zalogowanych], Ming Wo Man shot wife and children living within a field composed of the phase l {Tao Zhengxing Excerpt white. . . 7 single-source metal chloride compounds Zhou castrated high strength and plasticity. However, due to poor room temperature ductility, its application has been seriously affected. Y-TiA1 deformation machine hit a lot of papers in recent years,[link widoczny dla zalogowanych], the subject of study. Che reported the addition of two-phase Ⅳ (mouth. +?) Ti-46Al-~ V (at%) alloy Y-TiA1 deformation microstructure, and proposed interpretation of the y-TiA1 mediated deformation mechanism several views. Y-TiA1 deformation microstructure is b = 1 / 21110 \Apart from the above description of the ordinary and super dislocations dislocation outside,[link widoczny dla zalogowanych], Hug, Lciseau and Lasalmonie court also observed a temperature b = 112 {】 1}-type slip systems】 covalent effect the temperature in the Church is essentially inactive. This type of fine lines moving at 600 ℃ increase in activity may be due to thermal fluctuations of the Peierls stress is reduced. Y-TiA1 increase at a high temperature plastic with b =】 / 2 <J1O) increased dislocation activity and the formation of twins. Two-phase (a: a TitAI + YTiA1) Taijin at room temperature than the single-phase Y-TiAI greater plasticity. In the second phase (a + Y) Ti 46A1 a Taijin in a phase at room temperature deformation Y'TiA1 organization is subject】 / 2 <l10) dislocations control. In contrast, a single consistency of a】 8
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