航空材料学报2017，Vol.37Issue(3)：24-29,6.DOI:10.11868/j.issn.1005-5053.2016.000127
小角度晶界对DD5镍基单晶高温合金力学性能的影响
Effect of Low Angle Grain Boundaries on Mechanical Properties of DD5 Single Crystal Ni-base Superalloy
秦健朝 1崔仁杰 1黄朝晖 1赵金乾 1张毅鹏 1宗毳 1陈升平1
作者信息
- 1. 北京航空材料研究院 先进高温结构材料重点实验室, 北京 100095
- 折叠
摘要
Abstract
The effects of low angle grain boundaries on the mechanical properties of second generation single crystal superalloy DD5 were investigated and the test specimens were prepared by using seeds.The results show that at 870 ℃,the yield strength and breaking strength showed no difference when the angle is below 16.1°.The elongation is higher than 15% when the angle is below 11.4°,but the elongation decreases quickly when angle is above 11.4°.At 980 ℃/250 MPa,the rupture life is higher than 130 h when the angle is below 5.1°,and decreased slowly when the angle is above 5.1°.The rupture life still remaines 85% when the angle is 14.8°.But the rupture life decreases quickly when the angle is above 14.8°.At 1093 ℃/158 MPa,the rupture life is higher than 30 h when the angle is below 5.1°,and decreases when the angle is above 5.1°.关键词
高温合金/小角度晶界/持久寿命/拉伸性能Key words
superalloy/low angle grain boundary/rupture life/tensile property分类
矿业与冶金引用本文复制引用
秦健朝,崔仁杰,黄朝晖,赵金乾,张毅鹏,宗毳,陈升平..小角度晶界对DD5镍基单晶高温合金力学性能的影响[J].航空材料学报,2017,37(3):24-29,6.
