DD100镍基单晶合金的高温断裂分析

周灿栋;董显平;郁金星;张源虎;孙传棋;刘泽尧;李其娟;吴昌新

航空材料学报 ›› 1997, Vol. 17 ›› Issue (1) : 23-30.

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航空材料学报 ›› 1997, Vol. 17 ›› Issue (1) : 23-30.
论文

DD100镍基单晶合金的高温断裂分析

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ANALYSIS OF THE HIGH-TEMPERATURE FRACTURE OF Ni-BASED SINGLE CRYSTAL SUPERALLOY DD100

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摘要

通过对DD100单晶合金组织、断裂等方面的研究,探讨了影响单晶的断裂延性的因素。当DD100单晶合金中加入适量Hf元素后,单晶合金中无明显的疏松孔洞,γ/γ’共晶数量增加。发生瞬间断裂的不含Hf元素的试样中存在亚晶界、疏松孔洞以及γ/γ’共晶,但亚晶界的危害超过后两者。

Abstract

The microstructure and fracture of Ni-based single crystal DD100 and the factors of influencing the ductility of the alloy have been investigated. With an addition of Hf in DD100 alloy,no obvious porosities were found and the amount of γ/γ’ eutectic was increased. Sub-boundaries,porosities and γ/γ’ eutectics appear in the tensile specimens without containing Hf. It was found that the effect of sub-boundary on the properties was greater than the others.

关键词

镍基单晶高温合金 / 断裂 / 亚晶界

Key words

Ni-based single crys / fracture / sub-boundary

引用本文

导出引用
周灿栋, 董显平, 郁金星, 张源虎, 孙传棋, 刘泽尧, 李其娟, 吴昌新. DD100镍基单晶合金的高温断裂分析[J]. 航空材料学报, 1997, 17(1): 23-30
Zhou Candong, Dong Xianping, Yu Jinxing, Zhang Yuanhu, Sun Chuanqi, Liu Zeyao, Li Qijuan, Wu Changxin. ANALYSIS OF THE HIGH-TEMPERATURE FRACTURE OF Ni-BASED SINGLE CRYSTAL SUPERALLOY DD100[J]. Journal of Aeronautical Materials, 1997, 17(1): 23-30

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