کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1639419 | 1517028 | 2010 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of step-quenching on microstructure of aluminum alloy 7055
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Effect of step-quenching on microstructure of aluminum alloy 7055 Effect of step-quenching on microstructure of aluminum alloy 7055](/preview/png/1639419.png)
چکیده انگلیسی
The effect of step-quenching on the microstructure of aluminum alloy 7055 after artificial aging was studied by hardness testing and transmission electron microscopy (TEM). Step-quenching leads to decomposition of solid solution and heterogeneous precipitation of equilibrium phase mainly on dispersoids and at grain boundaries; thus lower hardness after aging. Prolonging isothermal holding at 415 °C results in coarser and more spaced η phase particles at grain boundaries with wider precipitates free zone, and lower density of larger ηⲠhardening precipitates inside grains after aging. Isothermal holding at 355 °C results in heterogeneous precipitation of η phase both on dispersoids and at grain boundaries. Isothermal holding at 235 °C results in heterogeneous precipitation of η phase first, and then S phase. Precipitates free zones are created around these coarse η and S phase particles after aging. Prolonging isothermal holding at these two temperatures leads to fewer ηⲠhardening precipitates inside grains, larger and more spaced η phase particles at grain boundaries and wider grain boundary precipitates free zone after aging.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Transactions of Nonferrous Metals Society of China - Volume 20, Issue 1, January 2010, Pages 1-6
Journal: Transactions of Nonferrous Metals Society of China - Volume 20, Issue 1, January 2010, Pages 1-6
نویسندگان
Sheng-dan LIU, Yong ZHANG, Wen-jun LIU, Yun-lai DENG, Xin-ming ZHANG,