کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1635075 | 1007012 | 2008 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Cooling γⲠprecipitation behavior and strengthening in powder metallurgy superalloy FGH4096
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
Two cooling schemes (continuous cooling and interrupted cooling tests) were applied to investigate the cooling γⲠprecipitation behavior in powder metallurgy superalloy FGH4096. The effect of cooling rate on cooling γⲠprecipitation and the development of γⲠprecipitates during cooling process were involved in this study. The ultimate tensile strength (UTS) of the specimens in various cooling circumstances was tested. The experiential equations were obtained between the average sizes of secondary and tertiary γⲠprecipitates, the strength, and cooling rate. The results show that they are inversely correlated with the cooling rate as well as the grain boundary changes from serrated to straight, the shape of secondary γⲠprecipitates changes from irregular cuboidal to spherical, while the formed tertiary γⲠprecipitates are always spherical. The interrupted cooling tests show that the average size of secondary γⲠprecipitates increases as a linear function of interrupt temperature for a fixed cooling rate of 24°C/min. The strength first decreases and then increases against interrupt temperature, which is fundamentally caused by the multistage nucleation of γⲠprecipitates during cooling process.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Rare Metals - Volume 27, Issue 4, August 2008, Pages 410-417
Journal: Rare Metals - Volume 27, Issue 4, August 2008, Pages 410-417
نویسندگان
Gaofeng TIAN, Chengchang JIA, Yin WEN, Guoquan LIU, Benfu HU,