| DD6单晶带气膜孔平板试件高周疲劳性能研究 |
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| 引用本文： | 张志金,张明岐. DD6单晶带气膜孔平板试件高周疲劳性能研究[J]. 电加工与模具, 2021, 0(1): 60-63. DOI: 10.3969/j.issn.1009-279X.2021.01.012 |
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| 作者姓名： | 张志金 张明岐 |
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| 作者单位： | 中国航空制造技术研究院,北京100024;中国航空制造技术研究院,北京100024 |
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| 摘 要： | 利用电液束、激光、电火花三种不同制孔工艺制备了DD6镍基单晶高温合金气膜孔平板试验件,在980℃下对试件的高周疲劳性能进行了测试,并对疲劳极限与断口形貌进行了分析比较.结果表明:不同制孔工艺对试件的高周疲劳性能影响显著,电液束制孔工艺的疲劳极限较高速电火花制孔、毫秒激光制孔工艺提升约5.3％和7.1％.不同制孔工艺的试...
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| 关 键 词： | DD6镍基单晶合金 气膜冷却孔 高周疲劳性能 |
Research on High-cycle Fatigue Behavior of DD6 Alloy Plate with Film-cooling Holes |
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| ZHANG Zhijin,ZHANG Mingqi. Research on High-cycle Fatigue Behavior of DD6 Alloy Plate with Film-cooling Holes[J]. Electromachining & Mould, 2021, 0(1): 60-63. DOI: 10.3969/j.issn.1009-279X.2021.01.012 |
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| Authors: | ZHANG Zhijin ZHANG Mingqi |
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| Affiliation: | (AVIC Manufacturing Technology Institute,Beijing 100024,China) |
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| Abstract: | Different drilling processes including electro-hydraulic beam,laser and EDM were used to prepare DD6 nickel-based single crystal superalloy plate with film-cooling holes,the high-cycle fatigue performance of the workpieces were tested at 980℃,and the fatigue limit and fracture morphology were analyzed and compared.The results showed that drilling process has significant effect on the high-cycle fatigue properties of the workpieces,and the fatigue limit of the electro-hydraulic beam drilling process is increased by 5.3%and 7.1%compared with the high-speed EDM and millisecond drilling process.The fracture morphology characteristics of the workpieces by different drilling processes are similar and belonged to typical multi-source fractures.The sections are roughly divided into three parts,including the crack source area around the hole,the expansion area along the{001}plane and the instantaneous fracture area along the{111}plane. |
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| Keywords: | DD6 nickel-based single crystal superalloy film-cooling hole high-cycle fatigue performance |
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