Relating residual stress and microstructure to mechanical and giant magneto-impedance properties in cold-drawn Co-based amorphous microwires

The effect of cold-drawing on the tensile property and giant magneto-impedance (GMI) effect of melt-extracted Co-based amorphous microwires was evaluated through detailed analyses of the distribution of residual stress and microstructural evolution. The tensile ductility and tensile strength increased gradually with cross-sectional area reduction ratio (R) until 51%, and decreased with further deformation. The microwire with R = 51% exhibits the highest tensile ductility of 1.09% and tensile strength of 4320 MPa. Structural and thermodynamic analyses reveal that it is the mechanical deformation rather than thermal activation that induces the precipitation of nanocrystals and arrests the quick extension of shear bands leading to the enhanced ductility. Interestingly, the GMI effect also attains the maximum value of 160% at 10 MHz when R = 51% (30% larger than that of the as-cast wires), before decreasing with further colddrawing. Such an identical evolution trend of both tensile and GMI properties can be ascribed to two underlying mechanisms: the generation of longitudinal and circumferential residual stresses and the growth of deformation-induced nanocrystals during cold-drawing. The role of residual stress is established herein not only as a trigger to accelerate the amorphous-to-nanocrystalline phase transformation but also as a decisive contributor to the mechanical and GMI performance. The unique simultaneous improvement of both mechanical and GMI properties of cold-drawn Co-based microwires opens up new possibilities for a variety of engineering applications, such as high-performance magnetic, stress and biological sensors. 2012 Published by Elsevier Ltd. on behalf of Acta Materialia Inc.

[1]  P. Yan,et al.  Tensile ductility and necking of metallic glass. , 2007, Nature materials.

[2]  P. Uggowitzer,et al.  Tensile properties of glassy MgZnCa wires and reliability analysis using Weibull statistics , 2009 .

[3]  Weihua Wang,et al.  Stress-induced structural inhomogeneity and plasticity of bulk metallic glasses , 2009 .

[4]  Y. Umakoshi,et al.  Preparation of Ni–Nb-based metallic glass wires by arc-melt-type melt-extraction method , 2009 .

[5]  Julia R. Greer,et al.  Plasticity in small-sized metallic systems: Intrinsic versus extrinsic size effect , 2011 .

[6]  P. Tiberto,et al.  Magnetic and magnetotransport properties of Fe-based glass-covered microwires , 2004 .

[7]  F. Qin,et al.  Influence of varying metal-to-glass ratio on GMI effect in Co70.3Fe3.7B10Si13Cr3 amorphous glass-coated microwires , 2010 .

[8]  G. MacLellan.  Plasticity in Engineering , 1948, Nature.

[9]  E-Wen Huang,et al.  Tensile deformation micromechanisms for bulk metallic glass matrix composites: From work-hardening to softening , 2011 .

[10]  Yuan Wu,et al.  Effects of drawing on the tensile fracture strength and its reliability of small-sized metallic glasses , 2010 .

[11]  S. Lee,et al.  Crystallization-induced plasticity of Cu–Zr containing bulk amorphous alloys , 2006 .

[12]  L. V. Panina,et al.  Magneto‐impedance effect in amorphous wires , 1994 .

[13]  A. Inoue,et al.  Production of PdCuSi amorphous wires by melt spinning method using rotating water , 1981 .

[14]  Arcady Zhukov,et al.  Design of the Magnetic Properties of Fe‐Rich, Glass‐Coated Microwires for Technical Applications , 2006 .

[15]  Bin Wang,et al.  Nonlinear tensile deformation behavior of small-sized metallic glasses , 2009 .

[16]  S. Takayama.  Drawing of Pd77.5Cu6Si16.5 metallic glass wires , 1979 .

[17]  Subra Suresh,et al.  A new method for estimating residual stresses by instrumented sharp indentation , 1998 .

[18]  Hua-Xin Peng,et al.  Giant magnetoimpedance materials: Fundamentals and applications , 2008 .

[19]  Stefan Carlsson,et al.  On the determination of residual stress and strain fields by sharp indentation testing.: Part II: experimental investigation , 2001 .

[20]  Y. Waseda,et al.  Formation and mechanical properties of Fe- and Co-base amorphous alloy wires produced by in-rotating-water spinning method , 1990 .

[21]  A. Antonov,et al.  Residual quenching stresses in amorphous ferromagnetic wires produced by an in-rotating-water spinning process , 1999 .

[22]  Kiyonori Suzuki,et al.  Magnetic-field-induced anisotropies and exchange softening in Fe-rich nanocrystalline soft magnetic alloys , 2012 .

[23]  A. Inoue,et al.  Production of Ni-Pd-Si and Ni-Pd-P amorphous wires and their mechanical and corrosion properties , 1985 .

[24]  Jan Schroers,et al.  Ductile bulk metallic glass. , 2004, Physical review letters.

[25]  A. Zhukov,et al.  Asymmetrical magneto-impedance effect in Fe-rich amorphous wires , 2004 .

[26]  A. F. Prokoshin,et al.  Residual quenching stresses in glass-coated amorphous ferromagnetic microwires , 2000 .

[27]  H. Qin,et al.  Diameter dependence of the giant magnetoimpedance in hard-drawn CoFeSiB amorphous wires , 2002 .

[28]  J. Hosson,et al.  Advances in Transmission Electron Microscopy: In Situ Straining and In Situ Compression Experiments on Metallic Glasses , 2009 .

[29]  Jingxue Sun,et al.  Bulk metallic glasses: Smaller is softer , 2007 .

[30]  Yaohe Zhou,et al.  Mechanically driven phase separation and corresponding microhardness change in Cu60Zr20Ti20 bulk metallic glass , 2005 .

[31]  J. Eckert,et al.  Unified tensile fracture criterion. , 2005, Physical review letters.

[32]  Y. Liu,et al.  Cooling-rate induced softening in a Zr50Cu50 bulk metallic glass , 2007 .

[33]  Hua-Xin Peng,et al.  Large GMI effect in Co-rich amorphous wire by tensile stress , 2011 .

[34]  Stefan Carlsson,et al.  On the determination of residual stress and strain fields by sharp indentation testing.: Part I: theoretical and numerical analysis , 2001 .

[35]  Xiao-Dong Wang,et al.  Fabrication and Characterization of Melt-Extracted Co-Based Amorphous Wires , 2011 .

[36]  J. Eckert,et al.  Improved Room Temperature Plasticity of Zr41.2Ti13.8Cu12.5Ni10Be22.5 Bulk Metallic Glass by Channel‐Die Compression , 2010 .

[37]  T. Hufnagel,et al.  Mechanical behavior of amorphous alloys , 2007 .

[38]  J. Eckert,et al.  Improved plasticity of bulk metallic glasses upon cold rolling , 2010 .

[39]  J. Eckert,et al.  "Work-Hardenable" ductile bulk metallic glass. , 2005, Physical review letters.

[40]  Marin Soljacic,et al.  Probing topological protection using a designer surface plasmon structure. , 2012 .

[41]  A. Yavari,et al.  Ultra-high strength above 5000 MPa and soft magnetic properties of Co–Fe–Ta–B bulk glassy alloys , 2004 .

[42]  J. Eckert,et al.  Ductile bulk metallic glasses produced through designed heterogeneities , 2011 .

[43]  A. Sergueeva,et al.  Ductile high strength microwires from glassy nanosteel alloys , 2012 .

[44]  A. Zhukov,et al.  Giant magnetoimpedance effect in soft magnetic wires for sensor applications , 1997 .

[45]  Weihua Wang.  The elastic properties, elastic models and elastic perspectives of metallic glasses , 2012 .

[46]  Weiqi Wang,et al.  Bulk Metallic Glasses with Functional Physical Properties , 2009 .

[47]  Chiriac,et al.  Internal stress distribution in glass-covered amorphous magnetic wires. , 1995, Physical review. B, Condensed matter.

[48]  J. Hosson,et al.  Intrinsic size effects in the mechanical response of taper-free nanopillars of metallic glass , 2011 .

[49]  Jianfei Sun,et al.  Nanocrystallization enabled tensile ductility of Co-based amorphous microwires , 2012 .

[50]  Gang Wang,et al.  Super Plastic Bulk Metallic Glasses at Room Temperature , 2007, Science.

[51]  J. Yi,et al.  Micro‐and Nanoscale Metallic Glassy Fibers , 2010 .

[52]  Sadek Z. Kassab,et al.  Temperature rise in wire-drawing , 1998 .

[53]  Jian Xu,et al.  Critical size and strength of the best bulk metallic glass former in the Mg-Cu-Gd ternary system , 2007 .