کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7973311 | 1514625 | 2018 | 26 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Preliminary creep testing of the alumina-forming austenitic stainless steel Fe-20Cr-30Ni-2Nb-5Al
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The alumina-forming austenitic stainless steel Fe-20Cr-30Ni-2â¯Nb-5Al was given a solutionizing anneal at 1250â¯Â°C followed by anneals at 800â¯Â°C for 0, 2.4, 24, 240â¯h to produce B2 (ordered b.c.c.) and Laves phase precipitates of different sizes with different extents of grain boundary coverage. Both tensile tests and constant-stress (43â¯MPa) creep tests were performed on the heat-treated materials and on the as-cast alloy at 760â¯Â°C. The precipitates grew during the creep testing. In addition, L12 (ordered f.c.c.) precipitates nucleated and grew during the creep testing to similar particle sizes after 500â¯h independent of the prior heat treatment at 800â¯Â°C. The specimens given the shortest heat treatment of 2.4â¯h, which had the smallest initial particle sizes, showed both the highest yield strength and the smallest creep strain after 500â¯h. The extent of grain boundary coverage by precipitates did not appear to affect the creep rates. No grain boundary cracking or precipitate cracking was found in the heat-treated specimens after creep testing, but the as-cast material failed around 600â¯h.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 718, 7 March 2018, Pages 492-498
Journal: Materials Science and Engineering: A - Volume 718, 7 March 2018, Pages 492-498
نویسندگان
Ian Baker, Natalie Afonina, Zhangwei Wang, Margaret Wu,