In situ observation of high temperature tensile deformation and low cycle fatigue response in a nickel-base superalloy

详细信息    查看全文

• 作者：Xudong Lu ; Jinhui Du ; Qun Deng
• 关键词：In-situ ; Low cycle fatigue ; Crack propagation ; Slip bands
• 刊名：Materials Science and Engineering: A
• 出版年：20 December, 2013
• 年：2013
• 卷：588
• 期：Complete
• 页码：411-415
• 全文大小：3529 K

文摘

High temperature tension and low cycle fatigue experiments of IN718 alloy have been performed in the electro-hydraulic servo system with scanning electron microscope at 455 掳C. Fatigue crack initiation and propagation process are investigated in situ. Results show that the carbide and twin grain are the crack source of the low cycle fatigue of IN718 alloy, and the low cycle fatigue life of the alloy increases with the decrease in grain size.