摘要
采用总应变控制方法,在INSTRON8032上对镍基高温合金GH4033在400、500、600、700℃温度下的疲劳行为进行了研究,用扫描电镜观察了疲劳断口.采用Manson-Coffin方程对实验结果进行了分析,得到了该材料的高温低周疲劳特性参数.从断口的扫描电镜照片中看出:高温疲劳失效断口的萌生区断裂机制为沿晶断裂,扩展区为沿晶和穿晶断裂的混合断裂,失稳断裂区为穿晶断裂.
The fatigue behavior of GH4033 nickel-based alloy at 400. 500. 600 and 700℃ were studied with the total strain-controlled method on the INSTRON8032, and the fracture of fatigue was observed by SEM. The experimental results are analyzed with Manson-CotTm＇s law, The LCF parameters of this material at these temperatures are acquired. The results shown that the fracture characteristic of crack initiation zone is the trans-granular fracture, crack propagation zone is mixed by the inter-granular fracture and trans-granular fracture, and crack quick growth zone is the inter-granular fracture.
出处
《湖南文理学院学报（自然科学版）》
CAS
2009年第2期69-71,共3页
Journal of Hunan University of Arts and Science(Science and Technology)
基金
湖南省研究生创新基金资助(1343-74236000006)
