عنوان مقاله :
تاثير نرخ سرمايش بر رسوب گذاري y در آلياژ Ni-11.6at.%AL
عنوان به زبان ديگر :
The effect of cooling rate on the precipitation of yʹ in
Ni-11.6 at.%AI alloy
پديد آورندگان :
صمدي، احد نويسنده Samadi, A
كليدواژه :
نرخ سرمايش , جوانه زني همگن , گرماسنجي , آلياژهاي Ni-AL , جوانه زني ناهمگن
چكيده لاتين :
scanning calorimetry (DSC), X-ray diffraction (XRD), electron diffraction and electron microscopy (FEG-SEM and TEM) techniques. Three samples were similarly solution treated and then cooled to room temperature under different cooling rates, 170 < 25 and 0.03ｰ Csʹ1. The results indicate a clearly homogenous yʹ nucleation during rapid quenching which takes place via simultaneous ordering and phase separation. However, by decreasing the cooling rate to 25ｰCsʹ1 the nucleation mechanism changes to heterogeneous on the preferred nucleation sites. The capability of the mentioned empirical techniques for studying the initial stages of the yʹis another subject which is studied in this article.
كلمات كليدي :
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