کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1637315 | 1516967 | 2014 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Continuous cooling precipitation diagram of cast aluminium alloy Al-7Si-0.3Mg
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Continuous cooling precipitation diagram of cast aluminium alloy Al-7Si-0.3Mg Continuous cooling precipitation diagram of cast aluminium alloy Al-7Si-0.3Mg](/preview/png/1637315.png)
چکیده انگلیسی
The precipitation behaviour during quenching of cast Al-7Si-0.3Mg aluminium alloy was investigated by DSC in the cooling rate range of 0.01 K/s to 3 K/s and by quenching dilatometry for higher rates. Two main precipitation reactions were observed during cooling, a high temperature reaction starting almost directly with quenching from 540 °C and a low temperature reaction starting at about 400 °C. Quenching with 3 K/s already significantly suppresses precipitation during quenching. Hardness after T6 ageing increases with increasing quenching rate, due to the increasing content of supersaturated solid solution. By dilatometry and hardness results the critical cooling rate can be estimated as about 60 K/s. Quenched Al-7Si-0.3Mg microstructures have been investigated by light microscopy. The microstructures consist of an aluminium-silicon eutectic structure, aluminium solid solution dendrites and precipitates inside the aluminium dendrites, depending on quenching rate.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Transactions of Nonferrous Metals Society of China - Volume 24, Issue 7, July 2014, Pages 2025-2033
Journal: Transactions of Nonferrous Metals Society of China - Volume 24, Issue 7, July 2014, Pages 2025-2033
نویسندگان
Benjamin MILKEREIT, Hannes FRÃCK, Christoph SCHICK, Olaf KESSLER,