High strain rate behavior of MC2 single crystal under uniaxial compression load at high temperature: Experiments and modeling

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• 作者：Louis Roux^a ; ^b ; Hervé ; Chalons^b ; Hubert Maigre^a ; Daniel Né ; lias ; ^a ; ^{daniel.nelias@insa-lyon.fr}
• 关键词：Split Hopkinson pressure bars ; MC2 single crystal ; Cubic material ; Viscoplasticity ; Local Hill yield criterion ; Transient dynamic ; Signal analysis ; Digital images correlation ; High-speed impact ; Turbine blade
• 刊名：Mechanics of Materials
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：104
• 期：Complete
• 页码：145-156
• 全文大小：4617 K
• 卷排序：104

文摘

Viscoplastic behavior of MC2 alloy is characterized under dynamic compression tests. A Split Hopkinson Pressure Bar setup has been used under high-temperature condition. The effects of temperature (25, 750 and 1000 °C) and crystal orientation (〈1 0 0〉, 〈1 1 0〉 and 〈1 1 1〉) under high strain rate compression (up to 610s−1) have been identified. An efficient model is proposed to perform blade-off simulations in turbine engine. Comparison between simulation and experiment for a plate-impact show good agreement in terms of residual deflection (difference of less than 10%) and strain fields.