کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
830817 1470361 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of hot rolling and titanium content on the microstructure and mechanical properties of high boron Fe–B alloys
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
پیش نمایش صفحه اول مقاله
Effects of hot rolling and titanium content on the microstructure and mechanical properties of high boron Fe–B alloys
چکیده انگلیسی

High boron Fe–B alloys (1.8 wt.% B) with different titanium contents are fabricated by Vacuum Induction Melting (VIM) technique. The integrated mechanical properties of the as-cast alloys are poor, especially the ductility. In this investigation, hot-rolling technology is used to improve the microstructure and mechanical properties. The microstructure analysis shows that hot rolling can reduce the size and improve the distribution of the reinforcements. The mechanical properties testing indicates that the yield strength is unchanged basically, but the tensile strength and elongation are improved greatly by hot rolling, especially the elongation. The content of titanium also has great effects on the microstructures and mechanical properties of the hot-rolled alloys. For the hot-rolled alloys, with the titanium content increasing, the ultimate tensile strength and yield strength first decrease slightly and then increase. The elongation and impact toughness are improved significantly. In particular, when the atomic ratio of Ti to B is 0.5, the reinforcements are almost entirely TiB2 and uniformly distributed in the Fe-matrix. The ternary Fe–B–Ti alloy exhibits balanced mechanical properties: yield strength, ultimate tensile strength, elongation and impact toughness are 334 MPa, 602 MPa, 16.2% and 213 kJ/m2, respectively.


► The content of B is 1.8 wt.% in the high boron Fe–B alloys.
► Hot-rolling improves the mechanical properties, especially the elongation.
► The Ti content affects the microstructure and mechanical properties.
► Eutectic boride can be eliminated when the atomic ratio of Ti/B is no less than 0.5.
► Alloy exhibits balanced mechanical properties when the atomic ratio of Ti/B is 0.5.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials & Design (1980-2015) - Volume 36, April 2012, Pages 88–93
نویسندگان
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