Zhendong ShengEffect of Cut-edge Properties on Hydrogen Embrittlement of Three High-Mn Steels | |||||
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ISBN: | 978-3-8440-7156-6 | ||||
Reeks: | Institut für Eisenhüttenkunde Uitgever: Prof. Dr.-Ing. W. Bleck, Prof. Dr.-Ing. U. Krupp, Prof. Dr.-Ing. S. Münstermann en Prof. Dr.-Ing. D. Senk Aachen | ||||
Volume: | 2020,1 | ||||
Trefwoorden: | Cutting; Hydrogen Embrittlement; Tensile Behavior; TWIP | ||||
Soort publicatie: | Dissertatie | ||||
Taal: | Engels | ||||
Pagina's: | 122 pagina's | ||||
Gewicht: | 171 g | ||||
Formaat: | 21 x 14,8 cm | ||||
Bindung: | Softcover | ||||
Prijs: | 45,80 € / 57,30 SFr | ||||
Verschijningsdatum: | Januari 2020 | ||||
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Samenvatting | This study aims to fill a knowledge gap about the cutting effect on hydrogen embrittlement behavior of three different high manganese steels (HMnS). Slow strain rate tests are carried out on uncharged and hydrogen-charged specimens which were processed by four cutting technologies: electrical discharge machining, laser cutting, abrasive waterjet cutting, and blanking. Detailed investigations of the cut-edge quality in terms of microstructure and mechanical properties elucidated the cutting influences on hydrogen-influenced fracture in HMnS.
Electrical discharge machining and laser cutting belong to thermal cutting which have limited influences on the initial microstructure and produce a relatively smooth cut-edge. Both abrasive waterjet cutting and blanking involve plastic deformation, but blanking generates a significant hardening effect with microvoids and distorted grains in the shear-affected zone (SAZ). Due to these factors, the blanked specimens show the worst tensile ductility regardless of hydrogen charging. Conversely, without edge hardening, the thermal-cut specimens exhibit less sensitivity to hydrogen embrittlement. The SAZ of the blanked specimens behaves as a pre-crack effect during tension, which is facilitated by the deformation twin. |