|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Fracture Properties and Residual Stresses in Small Dimensions
||Directional Dependency of the Fracture Behavior of High Strength Pearlitic Steel Wires
||Bernhard Völker, Marlene W. Kapp, Reinhard Pippan, Anton Hohenwarter
|On-Site Speaker (Planned)
High strength pearlitic steel wires are gaining recently more interest, since they are some of the strongest bulk materials produced with a strength of up to about 7 GPa. Two different wires with a drawing strain of 3.10 and 6.52 were investigated. Directional dependence of the fracture toughness was measured in drawing direction and perpendicular to it. To be able to test the fracture toughness of the samples in drawing direction micro-bending beams had to be fabricated utilizing a focused ion beam. For the investigation perpendicular to the drawing direction, tensile and bending tests with FIB notched wires were performed. The fracture toughness experiments for both directions were performed in-situ in the scanning electron microscope and ex-situ (perpendicular direction). It was revealed that in drawing direction the wires seem to be significantly less fracture tolerant than in the perpendicular direction. These findings are supported by the in-situ and ex-situ experiments.