شماره ركورد كنفرانس :
4562
عنوان مقاله :
Experimental investigation of the effects of torsion pitch in simultaneous tension-torsion deformation
Author/Authors :
M Pourbashiri School of Mechanical Engineering - Iran University of Science and Technology, Tehran , M Sedighi School of Mechanical Engineering - Iran University of Science and Technology, Tehran , C Poletti Institute of Materials Science and Welding - Graz University of Technology, Austria , C Sommitsch Institute of Materials Science and Welding - Graz University of Technology, Austria
كليدواژه :
Al wires , torsion pitch , properties , tension-torsion
عنوان كنفرانس :
The Bi-Annual International Conference on Experimental Solid Mechanics and Dynamics ۲۰۱۶
چكيده لاتين :
Commercial pure Al wires are deformed to different torsion pitch by a novel method combining the tension and torsion deformation. An equal channel angular die and a lathe machine are used to apply simultaneous tensiontorsion deformation to the initial wires. The amount of induced plastic strain is calculated experimentally after one pass of the deformation. The microstructure of the processed samples is investigated by optical microscopy. The results show that the average grain size of the annealed wire is decreased to 50μm and less than 15μm at the wire center and edge from an initial size of 120μm. The results also revealed a gradient distribution of grain refinement due to torsion deformation. The micro-hardness measurement indicates an increase in hardness of all processed samples. The hardness of annealed sample is increased from 30 HV to 62 HV in the wire center and 73 HV at the wire edge for the sample with 4.8mm torsion pitch. This novel method shows a significant applicability for continuous grain refinement of wires.
