کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8001560 1516283 2014 46 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental study on the correlation between intermediate temperature embrittlement and equi-cohesive temperature
ترجمه فارسی عنوان
بررسی تجربی روی همبستگی بین ضعف دمای متوسط ​​و دمای همجوشی
کلمات کلیدی
آلیاژهای نیکل، ضعف درجه حرارت متوسط، درجه حرارت همجوشی، تست کششی،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
چکیده انگلیسی
Intermediate temperature embrittlement is a general phenomenon in Ni-based superalloys and is frequently attributed to the equi-cohesive temperature. In this paper, the correlation between intermediate temperature embrittlement and equi-cohesive temperature is studied by the tensile ductility of high-purity Ni and binary Ni(Bi) alloy. Elevated-temperature tensile ductility of the Ni(Bi) alloy shows evident intermediate temperature embrittlement with minimum ductility between 700 °C and 750 °C, while that of high purity Ni does not. Room-temperature tensile ductility of Ni(Bi) alloy reveals clear minimum after a critical time of isothermal pre-annealing at 650 °C or 750 °C. The fracture morphologies of tensile samples are well consistent with the changes of their corresponding tensile ductility. Based on these results and reported results of Ni-based superalloys, it is clear that equi-cohesive temperature is insufficient to be a general interpretation for intermediate temperature embrittlement.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 610, 15 October 2014, Pages 288-293
نویسندگان
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