Abstract
ABSTRACTTo obtain both ultra-high strength and good ductility in pearlitic steel wires, a new processing technique was proposed following the principle of inherited texture. Microstructure evolution of pearlitic wires was investigated by FE-SEM, EBSD and TEM, and while mechanical properties were determined by tensile and torsional tests. Two types of wires with different ferrite <110> texture intensity were obtained by varying pre-drawing strain. The orientation between ferrite <110> and drawing direction exhibited a great effect on the deformation behaviour of pearlite. For the ferrite <110> parallel to drawing direction, cementite lamellae were straightened and dislocations within ferrite were evenly distributed. However, for the ferrite <110> at an angle to drawing direction, the cementite was bent and the distribution of dislocations within ferrite was uneven. Consequently, pearlitic wires with a higher texture level exhibited an extremely high tensile strength, coupled with a remarkable torsion tolerance.This is part of a thematic issue on Pearlitic Steel Wires.
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