Formation and mechanical properties of ductile Fe-based amorphous alloys using a cast iron with minor addition of B and Al

Abstract Fe-based amorphous alloys with ductility were synthesized using the commercial cast iron QT50 (denoted as QT) with the combining minor addition of B and Al by single roller melt-spinning. The melt-spun (QT1-xBx)99Al1 (x is from 0.006wt% to 0.01wt%) amorphous alloys exhibit onset crystallization temperatures and Curie temperatures of 759–780 and 629–642 K respectively, and which increase with B content. The amorphous ribbons are ductile and can be bent 180° without breaking. With the increase in B content from 0.006wt% to 0.01wt%, the Vickers microhardness of the amorphous alloys increases from Hv 830 to Hv 1110. The effects of the additional B and Al elements on the glass forming ability and mechanical properties were also discussed.

[1]  Tao Zhang,et al.  Glass Formation and Thermal Stability of Bulk Glassy Cu–Zr–Ti–Sn–Si Alloys , 2005 .

[2]  I. Betancourt,et al.  Effect of B, Si and Cr on the mechanical properties of Fe-based amorphous metallic ribbons , 2005 .

[3]  X. M. Wang,et al.  Bulk amorphous FC20 (Fe–C–Si) alloys with small amounts of B and their crystallized structure and mechanical properties , 2000 .

[4]  G. Wang,et al.  Exceptionally high glass-forming ability of an FeCoCrMoCBY alloy , 2005 .

[5]  T. Chin,et al.  Magnetic properties and glass-forming ability of modified Fe-P-Si-B bulk amorphous alloys , 2004 .

[6]  S. Poon,et al.  Fe-based bulk metallic glasses with diameter thickness larger than one centimeter , 2004 .

[7]  C. Liu,et al.  Structural amorphous steels. , 2004, Physical review letters.

[8]  D. Turnbull,et al.  Evidence of a Glass-Liquid Transition in a Gold-Germanium-Silicon Alloy , 1968 .

[9]  A. Takeuchi,et al.  Bulk amorphous alloys with high mechanical strength and good soft magnetic properties in Fe–TM–B (TM=IV–VIII group transition metal) system , 1997 .

[10]  P. Duwez,et al.  Amorphous Ferromagnetic Phase in Iron‐Carbon‐Phosphorus Alloys , 1967 .

[11]  H. Chen,et al.  Thermodynamic considerations on the formation and stability of metallic glasses , 1974 .

[12]  C. Liu,et al.  Role of minor alloying additions in formation of bulk metallic glasses: A Review , 2004 .

[13]  A. K. Niessen,et al.  Cohesion in metals , 1988 .

[14]  U. König,et al.  Soft magnetic low-cost amorphous Fe-Si-B alloys, their properties and potential uses , 1980 .

[15]  A. Inoue,et al.  Effects of Chromium on the Glass Formation and Corrosion Behavior of Bulk Glassy Fe-Cr-Mo-C-B Alloys , 2002 .

[16]  A. Inoue,et al.  Formation of Bulk Glassy Fe_75–x–yCr_xMo_yC_15B_10 Alloys and Their Corrosion Behavior , 2002 .