کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5448016 1511769 2017 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microstructural evolution and strengthening behavior in in-situ magnesium matrix composites fabricated by solidification processing
ترجمه فارسی عنوان
تکامل میکرو سازگار و رفتار تقویت در محل ترکیبات ماتریس منیزیم ساخته شده توسط پردازش جامد سازی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
چکیده انگلیسی
In-situ magnesium matrix composites with three different matrix materials (including Mg, AZ91 and AE44 Mg-alloys) were fabricated by injecting cross-linked polymer directly into the molten Mg/Mg-alloys, and having it convert to the 2.5 vol% SiCNO ceramic phase using liquid stir-casting method. In-situ chemical reaction took place within the molten slurry tending to produce 42 and 18 vol% Mg2Si crystals in Mg and AE44 matrix composites, respectively but not in AZ91 matrix composite. Microstructural evolution of Mg2Si crystals was discussed on the basis of availability of heterogeneous nucleation sites and amount of Al-atoms in the molten slurry. The observed micro-hardness and yield strengths are enhanced by factor of four to three as compared to their unreinforced counterparts, and Taylor strengthening was found to be the predominant strengthening mechanism in magnesium and AE44 matrix composites. Summation model predicted the yield strengths of the fabricated composites more preciously when compared to Zhang and Chen, and modified Clyne models.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 194, 15 June 2017, Pages 65-76
نویسندگان
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