The thermal stability of Cu-14Fe and Cu-14Fe-0.07Ag in situ composites is investigated. The evolution
of Fe filaments in two composites is analyzed detailedly by annealing at high temperature. The results indicate
that the Cu-14Fe in situ composite exhibits two kinds of evolution of Fe filament, the longitudinal splitting of
Fe filaments at low temperature (below 600℃) and spheroidization of Fe filaments at high temperature (above
600℃). With the addition of trace Ag, the longitudinal splitting of Fe filaments at low temperature is accelerated,
while spheroidization of Fe filaments at high temperature inhibited. The microstructure evolution procedure
of Cu-14Fe without and with trace Ag has been modeled. This work would promote the understanding of the
microstructure evolution of Cu-Fe in situ composite.
LIU Yong1 (刘勇), SHAO Shuang1 (邵爽), XU Chun-shui1 (徐春水), LIU Ke-ming2 (刘克明)
. Study on the Thermal Stability of Cu-14Fe in Situ Composite without and with Trace Ag[J]. Journal of Shanghai Jiaotong University(Science), 2012
, 17(3)
: 268
-272
.
DOI: 10.1007/s12204-012-1266-0
[1] Sandim H R Z, Sandim M J R, Bernardi H H, et al. Annealing effects on the microstructure and texture of
a multifilamentary Cu-Nb composite wire [J]. Scripta Materialia, 2008, 51(11): 1099-1104.
[2] Gaganov A, Freudenberger J, Botcharova E, et al. Effect of Zr additions on the mcrosturcture, and the
mechanical and electrical properties of Cu-7wt.%Ag alloys [J]. Materials Science and Engineering A, 2006,437(2): 313-322.
[3] Wang E G, Qu Lei, Zuo X W, et al. Thermal stability of Fe filaments in deformed Cu-Fe composites [J].
Materials Science Forum, 2010, 654-656: 2720-2723.
[4] Chen Xiao-hong, Liu Ping, Tian Bao-hong, et al.Thermal stability of Cr filaments in Cu-Cr in-situ composites
[J]. The Chinese Journal of Nonferrous Metals, 2009, 19(2): 328-333 (in Chinese)
[5] Gao H Y, Wang J, Sun B D. Effect of Ag on the thermal stability of deformation processed Cu-Fe in
situ composites [J]. Journal of Alloys and Compounds,2009, 469(1-2): 580-586.
[6] Liu K M, Lu D P, Zhou H T, et al. Effect of Ag micro-alloying on the microstructure and properties of
Cu-14Fe in situ composite [J]. Materials Science and Engineering A, 2010, 527(18-19): 4953-4958.
[7] SpitzigWA, Chumbley L S, Verhoeven J D, et al. Effect of temperature on the strength and conductivity
of a deformation processed Cu-20%Fe composite [J].Journal of Material Science, 1992, 27(8): 2005-2011.
[8] Malzahn-Kampe J C, Courtney T H. Elevated temperature microstructural stability of heavily coldworked
in situ composites [J]. Scripta Metallurguca,1986, 20(2): 285-289.
[9] Gao H Y, Wang J, Shu D, et al. Microstructure and properties of Cu-11Fe-6Ag in situ composite after
thermo-mechanical treatments [J]. Journal of Alloys and Compounds, 2007,438(1-2): 268-273.
[10] Raabe D, Ge J. Experimental study on the thermal stability of Cr filaments in a Cu-Cr-Ag in situ composite
[J]. Scripta Meterialia, 2004, 51(9): 915-920.
[11] Hackney S A. On the linear instability of the Rayleigh spheroidization process [J]. Scripta Metallurgica
et Materialia, 1991, 25(4): 799-804.
[12] Sharma G, Ramanujan R V, Tiwari G P. Instability mechanisms in lamellar microstructures [J]. Acta Materialia, 2000, 48(4): 875-889.
[13] Malzahn-Kampe J C, Courtney T H, Leng Y. Shape instabilities of plate-like structures. I. Experimental observations in heavily cold worked in situ composites
[J]. Acta Metallurgica, 1989, 37(7): 1735-1745.
