کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1580834 1514833 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of heat treatments on the microstructure of IN792 alloy
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Effects of heat treatments on the microstructure of IN792 alloy
چکیده انگلیسی

The microstructure of IN792 alloy were investigated at the as-cast state, annealed state at 845 °C for 24 h, HS1220 and HS1120 heat treatment states (the material was solution heat treated at 1220 and 1120 °C, respectively, followed by a two-stage ageing process with 4 h at 1080 °C and 24 h at 845 °C, which were named HS1220 and HS1120, respectively). The incipient points of eutectic and solution temperature of carbide are 1230 and 1260 °C, respectively, which are measured by metallographic examination. Chinese script MC-type carbides, rose-shaped γ′/γ eutectic and cubic γ′ phase are observed in the as-cast IN792 alloy. The annealed microstructure is the same as that of as-cast alloy because the annealing treatment only removes the residual cast stress. After HS1120 solution treatment, MC-type carbides and rose-shaped γ′/γ eutectic partly dissolves into γ matrix, and M23C6 carbide that has a cube–cube orientation relationship with γ matrix forms near γ′/γ eutectic and MC-type carbides. After HS1220 solution treatment, rose-shaped γ′/γ eutectic completely dissolves into γ matrix, but morphology of carbides does not change. The subsequent aging treatments make γ′ phase arrange regularly, and induce re-precipitation of profuse fine γ′ particles throughout γ matrix channels.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 527, Issues 4–5, 15 February 2010, Pages 1016–1021
نویسندگان
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