کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1611514 | 1516294 | 2014 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of alloying elements on the microstructure and mechanical properties of nanostructured ferritic steels produced by spark plasma sintering
ترجمه فارسی عنوان
اثر عناصر آلیاژی بر ریزساختار و خواص مکانیکی فولادهای نانوساختار فریتیکه تولید شده بوسیله اسپکتروسکوپی جرقه
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کلمات کلیدی
نانوساختارها، آلیاژ مکانیکی متالورژی پودر، میکروسکوپ الکترونی انتقال، آلیاژ درجه حرارت بالا
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
چکیده انگلیسی
Several Fe-14Cr based alloys with varying compositions were processed using a combined route of mechanical alloying and spark plasma sintering. Microstructural characteristics of the consolidated alloys were examined via transmission electron microscopy and atom probe tomography, and mechanical properties evaluated using microhardness testing. Lanthanum oxide (0.5Â wt.%) was added to Fe-14Cr leading to improvement in microstructural stability and mechanical properties mainly due to a high number density of La-Cr-O-enriched nanoclusters. The combined addition of La, Ti (1Â wt.%) and Mo (0.3Â wt.%) to the Fe-14Cr base composition further enhanced the microstructural stability and mechanical properties. Nanoclusters enriched in Cr-Ti-La-O with a number density of 1.4Â ÃÂ 1024Â mâ3 were found in this alloy with a bimodal grain size distribution. After adding Y2O3 (0.3Â wt.%) along with Ti and Mo to the Fe-14Cr matrix, a high number density (1.5Â ÃÂ 1024Â mâ3) of Cr-Ti-Y-O-enriched NCs was also detected. Formation mechanism of these nanoclusters can be explained through the concentrations and diffusion rates of the initial oxide species formed during the milling process and initial stages of sintering as well as the thermodynamic nucleation barrier and their enthalpy of formation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 599, 25 June 2014, Pages 206-211
Journal: Journal of Alloys and Compounds - Volume 599, 25 June 2014, Pages 206-211
نویسندگان
Somayeh Pasebani, Indrajit Charit,