TY - JOUR
T1 - Nanoscale characterization of the transfer layer formed during dry sliding of Cu-15 wt.% Ni-8 wt.% Sn bronze alloy
AU - Singh, J. B.
AU - Wen, J. G.
AU - Bellon, P.
N1 - Funding Information:
The present research has been supported by the National Science Foundation under Grant DMR-03-04942. We thank the Brush–Wellman Company for providing us with the bronze alloy studied here. The characterization of the materials has been carried out at the Center for Microanalysis of Materials, at the Frederick Seitz Materials Research Laboratory Central Facilities, University of Illinois, which are partially supported by the US Department of Energy under grants DE-FG02-07ER46453 and DE-FG02-07ER46471.
PY - 2008/8
Y1 - 2008/8
N2 - The microstructure of the transfer layer, and the underlying severely plastically deformed layer (SPDL), formed during the dry sliding of a spinodally hardened Cu-15 wt.% Ni-8 wt.% Sn bronze against a stainless steel, is characterized at the nanoscale by conventional and analytical transmission electron microscopy, including energy-dispersive spectroscopy and electron energy loss spectroscopy. The SPDL consists of a Cu-Ni-Sn solid solution with elongated nanograins, due to extensive dislocation glide and twinning. In contrast, the transfer layer, 2-3 μm thick, is an equiaxed nanocomposite comprised of a Cu-rich metallic phase with a (Fe,Cr)2O3-based oxide precipitates, and forms as a result of the mechanical mixing and compaction of wear debris. The bronze in this layer has undergone dealloying, indicative of the importance of thermal effects. The dispersion of oxide in the transfer layer suggests a different type of forced mixing, possibly turbulent mixing. The transfer layer is observed to improve significantly the wear resistance of the bronze.
AB - The microstructure of the transfer layer, and the underlying severely plastically deformed layer (SPDL), formed during the dry sliding of a spinodally hardened Cu-15 wt.% Ni-8 wt.% Sn bronze against a stainless steel, is characterized at the nanoscale by conventional and analytical transmission electron microscopy, including energy-dispersive spectroscopy and electron energy loss spectroscopy. The SPDL consists of a Cu-Ni-Sn solid solution with elongated nanograins, due to extensive dislocation glide and twinning. In contrast, the transfer layer, 2-3 μm thick, is an equiaxed nanocomposite comprised of a Cu-rich metallic phase with a (Fe,Cr)2O3-based oxide precipitates, and forms as a result of the mechanical mixing and compaction of wear debris. The bronze in this layer has undergone dealloying, indicative of the importance of thermal effects. The dispersion of oxide in the transfer layer suggests a different type of forced mixing, possibly turbulent mixing. The transfer layer is observed to improve significantly the wear resistance of the bronze.
KW - Analytical electron microscopy
KW - Copper alloys
KW - Severe plastic deformation
KW - Transmission electron microscopy
KW - Wear
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U2 - 10.1016/j.actamat.2008.02.040
DO - 10.1016/j.actamat.2008.02.040
M3 - Article
AN - SCOPUS:45849085700
SN - 1359-6454
VL - 56
SP - 3053
EP - 3064
JO - Acta Materialia
JF - Acta Materialia
IS - 13
ER -