کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1573973 1514696 2015 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nanostructure evolution and mechanical property changes during aging of a super duplex stainless steel at 300 °C
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Nanostructure evolution and mechanical property changes during aging of a super duplex stainless steel at 300 °C
چکیده انگلیسی
The nanostructure evolution and the corresponding changes in mechanical properties of a super duplex stainless steel 2507 (UNS S32750) during aging at 300 °C up to 12,000 h have been investigated. Microstructural studies using transmission electron microscopy and atom probe tomography show that subtle Cr concentration fluctuations develop during aging. The amplitude of the concentration fluctuations is proportional to the hardness of the ferrite phase, and it is also proportional to the decrease in room temperature impact toughness during aging. The fracture behaviour of the alloy changes gradually from ductile to cleavage fracture, upon aging. The cracks were found to propagate through the ferrite phase, partly along deformation twin interfaces, and delamination between the austenite and ferrite phases was observed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 647, 28 October 2015, Pages 241-248
نویسندگان
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