کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1573380 | 1514674 | 2016 | 29 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Mechanical properties and microstructural evolution of nanocrystalline titanium at elevated temperatures
ترجمه فارسی عنوان
خواص مکانیکی و تکامل میکرو سازه تیتانیوم نانوکریستال در دمای بالا
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کلمات کلیدی
رفتار درجه حرارت بالا، چرخش فشار بالا، مواد نانوساختار، تغییر شکل پلاستیک شدید تیتانیوم،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
چکیده انگلیسی
An investigation was initiated to study the mechanical properties and microstructural evolution of nanocrystalline titanium in the temperature range of 473-923Â K after processing by high-pressure torsion (HPT) under a pressure of 5.0Â GPa for up to 10 turns. The results show there is a significant improvement in both the tensile strength and the ductility in nanocrystalline Ti by comparison with coarse-grained (CG) Ti at elevated temperatures. The strength of HPT-processed Ti drops to that of CG Ti at temperatures above 773Â K because of grain growth. An investigation of the mechanical behavior at elevated temperatures reveals an increasing-decreasing-increasing trend in the elongations to failure with increasing temperature. An elongation of >130% was achieved both at 673Â K and above 773Â K for the HPT-processed samples and this was significantly larger than for the CG Ti. The highest measured elongation was ~200% for the HPT-processed sample tested at 923Â K. A good combination of strength and elongation to failure was achieved in the temperature range of 573-773Â K after HPT processing.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 669, 4 July 2016, Pages 358-366
Journal: Materials Science and Engineering: A - Volume 669, 4 July 2016, Pages 358-366
نویسندگان
Hamed Shahmir, Pedro Henrique R. Pereira, Yi Huang, Terence G. Langdon,