GH4169镍基合金高温超声疲劳试验设计与分析  

Test Design and Analysis of High Temperature Ultrasonic Fatigue of GH4169 Nickel-Based Alloy

作　　者：陈永辉[1] 潘凯 张成成 王昭晗 杭超 CHEN Yonghui;PAN Kai;ZHANG Chengcheng;WANG Zhaohan;HANG Chao(National Key Laboratory of Strength and Structural Integrity,Aircraft Strength Research Institute of China,Xi′an 710065,Shaanxi,China;Chinese Aeronautical Establishment,Beijing 100020,China;AECC Commercial Aircraft Engine Co.,Ltd.,Shanghai 200241,China)

机构地区：[1]中国飞机强度研究所,强度与结构完整性全国重点试验室,陕西西安710065 [2]中国航空研究院,北京100020 [3]中国航发商用航空发动机有限责任公司,上海200241

出　　处：《工程与试验》2025年第1期71-74,共4页Engineering and Test

基　　金：国家科技重大专项(J2019-Ⅳ-0010-0078)。

摘　　要：为探究航空发动机常用的GH4169镍基合金的超高周疲劳性能,基于压电超声疲劳试验系统,通过有限元软件设计出一种可实现20kHz高频振动的疲劳试样,并完成了常温及高温环境下的疲劳试验。试验结果表明,GH4169材料在高温环境下的超高周疲劳强度低于常温。断口分析结果表明,在常温及高温环境下,GH4169镍基合金的裂纹萌生均呈现表面及次表面的滑移起裂模式,试样表面缺陷和碳化物是引起裂纹萌生的主要原因。In order to investigate the very high cycle fatigue(VHCF)performance of GH4169 nickel-based alloy commonly used in aero-engines,based on the piezoelectric ultrasonic fatigue test system,a fatigue specimen that can realize 20kHz high-frequency vibration is designed by using finite element software,and the fatigue tests are carried out at room temperature and high temperature.The test results show that the VHCF strength of GH4169 material in high temperature environment is lower than that in normal temperature.The results of fracture analysis show that the crack initiation of GH4169 nickel-based alloy are both surface and subsurface slip initiation modes at normal temperature and high temperature,and the surface defects and carbides of the sample are the main causes of crack initiation.

关 键 词：航空发动机 GH4169镍基合金 超声疲劳 试验设计 

分 类 号：V250.2[一般工业技术—材料科学与工程]