On The Fatigue Short Crack Behaviors of Directionally Solidified Superalloy DZ4 by In Situ SEM Observations

摘要：

Small fatigue crack behaviors in a nickel-based directionally solidified superalloy DZ4 were studied by in situ scanning electron microscopy. The crack initiation and propagation manners were identified under different temperatures, i.e. 25℃, 350℃, 700℃. Crack growth showed to be associated with the configuration and relative direction of carbide. The anomalous short crack growth was pronounced at 25℃, 350℃ and not evident at 700℃, which was analyzed by in situ examining the effect of microstructure.

关键词： Directionally solidified superalloy In situ fatigue Short crack Carbide

作者: Xianfeng Ma Huiji Shi

作者单位: AML, School of Aerospace, Tsinghua University, Beijing 100084, P.R. China

会议类型: 国际会议

会议名称: The 2nd International Conference on Advances in Product Development and Reliability(第二届产品开发与可靠性进展国际会议 PDR2010)

会议地点: 沈阳

会议语种:英文

页码: 289-293

在线出版日期: 2010-07-28（万方平台首次上网日期，不代表论文的发表时间）