| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Outline of Final Research Achievements |
Wires for automotive wiring harness are produced by wire drawing, and not only high tensile strength but also high ductility and high fatigue strength are required for them. Ductility of the drawn wire decreases as the frequency of wire drawing increases. In this study, alternately drawn wires and unidirectionally drawn wires of 99.77% total reduction were prepared, and the effect of alternate drawing on mechanical properties and texture of drawn wires were examined by tensile test, torsion test, fatigue test, FEM analysis and crystal texture analysis by EBSD. Tensile strength of alternately drawn wires represented more than 160MPa which is the strength required for wiring harnesses, and breaking strain of alternately drawn wires is 0.01 higher than that of unidirectionally drawn wires.
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