کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1576266 | 1514772 | 2013 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of alloy elements on microstructure and creep properties of fine-grained nickel-based superalloys at moderate temperatures
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Effects of alloy elements on microstructure and creep properties of fine-grained nickel-based superalloys at moderate temperatures Effects of alloy elements on microstructure and creep properties of fine-grained nickel-based superalloys at moderate temperatures](/preview/png/1576266.png)
چکیده انگلیسی
This study investigated the effects of alloy elements on the microstructure and mechanical properties of the TM-321 and Mar-M247 nickel-based superalloys using a fine-grain process. The results showed that the yield strength of the TM-321 superalloy was higher than that of the Mar-M247 superalloy at room and moderate temperatures, and the creep test found the life of the TM-321 superalloy 1.55 times longer than that of the Mar-M247 superalloy at 760 °C/724 MPa because of three major reasons. First, the TM-321 superalloy displayed a superior solid-solution strengthening effect than the Mar-M247 superalloy due to its higher content of solid-solution strengthening elements. Second, the higher content of Ta addition in the TM-321 superalloy, which can inhibit the γⲠphase from coagulating and growing at high temperatures during long exposure, helped decrease the γⲠphase size and enhance its thermal stability. Moreover, TM-321 possessed a larger number of primary γⲠand secondary γⲠphases exhibiting superior creep resistance because of the precipitation strengthening effect. Third, superior to that of the M23C6 carbides of the Mar-M247 superalloy, the thermal stability of the M6C type carbide of the TM-321 superalloy helped improve its mechanical properties.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 571, 1 June 2013, Pages 155-160
Journal: Materials Science and Engineering: A - Volume 571, 1 June 2013, Pages 155-160
نویسندگان
Yi-Lung Tsai, Sea-Fue Wang, Hui-Yun Bor, Yung-Fu Hsu,