| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1612619 | Journal of Alloys and Compounds | 2014 | 5 Pages |
•An Fe-based BAS with high GFA and large supercooled region has been successfully produced.•Fe-B9 BAS exhibits higher corrosion resistance than 304 SS and 316 SS in Hank’s solution.•Fe-B9 BAS blade exhibits much higher sharpness than the commercial one.•Fe-B9 BAS blade presents much better durability than the commercial one on cutting test.
A prominent Fe-base bulk amorphous steel (BAS) alloy which presents high glass forming ability (GFA), good corrosion resistance, superior mechanical properties and relative lower cost. The Fe41Cr15Co7Mo14C21−xBxY2 (x = 5–10) BAS rods with a diameter of 2–6 mm, can be fabricated by the suction casting method. The highest GFA value can be obtained by adjusting the ratio of boron/carbon, reaching to the value of γ = 0.4 and γm = 0.69 for the alloy composition of Fe41Ce15Co7Mo14C12B9Y2. Meanwhile, this alloy also presents very large supercooled liquid region up to 81 K, favourable to be fabricated into micro-surgery tools by thermoplastic forming. In addition, the Fe-base BAS alloy exhibits extremely high hardness around 1200 Hv. The anodic polarization measurement of the Fe-based BAS exhibits a higher corrosion resistance than 304 SS and 316 SS in the Hank’s balanced salt solution. The sharpness test results reveal that the Fe-based BAS blade exhibits much higher sharpness because of its lower surface roughness and higher hardness. Moreover, the Fe-base BAS blade presents much better durability on cutting testing, it can remain relatively sharper edge-tip with a low blade sharpness index (BSI) value of 0.38 (in comparison with the BSI value of 0.59 for commercial blades) after the cutting testing over 50 cm length.
Graphical abstractSEM images of the surface profile on the blade edge-tip for (a) commercial blade and (b) Fe-B9 BAS blade. SEM images of blade edge-tip for (c) as-received commercial blade, (d) commercial blade after cutting test of 25 cm length, (e) as-prepared Fe-B9 BAS blade, and (f) Fe-B9 BAS blade after cutting test of 25 cm length.Figure optionsDownload full-size imageDownload as PowerPoint slide
