کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7899358 | 1510164 | 2017 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Influence of Mo alloying on the thermal stability and hardness of ultrafine-grained Ni processed by high-pressure torsion
ترجمه فارسی عنوان
تاثیر آلیاژ مولیبدن بر پایداری حرارتی و سختی نیکل نانو ذرات نوردی که توسط چرخش با فشار بالا طراحی شده است
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
چکیده انگلیسی
The influence of Mo alloying on the thermal stability of grain size, dislocation density and hardness of ultrafine-grained (UFG) Ni alloys was studied. The UFG microstructure in alloys with low (â¼0.3Â at.%) and high (â¼5Â at.%) Mo contents was achieved by high-pressure torsion (HPT) performed for 20 turns at room temperature. The thermal stability of the two alloys was studied by calorimetry. A Curie-transition from ferromagnetic to paramagnetic state was not found for the Ni-5% Mo alloy due to the high Mo content. It was found that heating at a rate of 40Â K/min up to â¼850Â K resulted in a complete recovery and recrystallization of the UFG microstructure in the alloy with 0.3% Mo. The same annealing for Ni-5% Mo led only to a moderate reduction of the dislocation density and the grain size remained in the UFG regime. Therefore, the higher Mo content yielded a much better thermal stability of the Ni alloy. The influence of the change of the microstructure during annealing on the hardness is discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Materials Research and Technology - Volume 6, Issue 4, OctoberâDecember 2017, Pages 361-368
Journal: Journal of Materials Research and Technology - Volume 6, Issue 4, OctoberâDecember 2017, Pages 361-368
نویسندگان
Garima Kapoor, Yi Huang, V. Subramanya Sarma, Terence G. Langdon, JenÅ Gubicza,