文献类型：期刊文献

中文题名：铣削参数对高温合金GH4169低周疲劳性能影响研究

英文题名：Effect of different milling parameters on GH4169 low cycle fatigue life

作者：李子璇[1];雷学林[1];何云[1];史玉凯[1]

机构：[1]华东理工大学机械与动力工程学院,上海200237

年份：2021

期号：7

起止页码：114

中文期刊名：制造技术与机床

外文期刊名：Manufacturing Technology & Machine Tool

收录：CSTPCD;;Scopus;北大核心:【北大核心2020】；

基金：国家科技重大专项“汽车发动机关键部件成套刀具应用示范”(2018ZX04040-001);上海市青年科技英才扬帆计划项目“航空航天用高温合金的高效切削加工工艺研究”(17YF1403100)。

语种：中文

中文关键词：高温合金;表面质量;低周疲劳寿命;塑性变形

外文关键词：high temperature alloy;surface quality;low-cycle fatigue life;plastic deformation

摘要：利用正交试验法,以不同的参数侧铣加工出9组疲劳试样,通过硬度仪与三维轮廓仪等测出试样表面质量参数,再利用疲劳实验机进行低周疲劳对比试验,最后使用SEM电镜对试样断口进行分析。疲劳实验表明:切削速度对低周疲劳寿命的影响变化最大,铣削深度次之,进给量的影响最小。试样在高于屈服强度的载荷的循环作用下,内部塑性变形,引起疲劳裂纹源的萌生和扩展是疲劳断裂的主要原因。同时建立了低周疲劳寿命关于铣削参数的数学模型,可用于估算低周疲劳寿命的长短。
The orthogonal test method is used to analysis nine samples with different milling parameters.The surface quality parameters of the samples are measured by the hardness tester and three-dimensional profiler.Then the fatigue test machine is used for low-cycle fatigue comparison tests,and finally SEM is used to analyzes the fracture of the sample.Fatigue experiments show that the effect of cutting speed on low-cycle fatigue life is the most,followed by the depth of cut,and the effect of feed rate is the smallest.The internal plastic deformation of the specimen under cyclic loading above the yield strength causes the initiation and propagation of fatigue crack sources,which is the main reason of fatigue fracture.Mathematical model is established to estimate the length of low-cycle fatigue life.