火焰筒整流罩粗晶组织性能分析及试验验证  

Mechanical properties analysis and verification of coarse grain structure on flame tube fairing

作　　者：迟庆新 刘欢 高建辉 门玉宾 佟文伟 刘芳 CHI Qingxin;LIU Huan;GAO Jianhui;MEN Yubin;TONG Wenwei;LIU Fang(AECC Shenyang Engine Research Institute,Shenyang 110015,China)

机构地区：[1]中国航发沈阳发动机研究所,辽宁沈阳110015

出　　处：《兵器材料科学与工程》2024年第6期31-35,共5页Ordnance Material Science and Engineering

基　　金：航空动力基础研究项目。

摘　　要：某型航空发动机在试车后的检查中发现多台发动机的火焰筒整流罩存在裂纹,为了分析故障原因和改进设计工作,开展了晶粒尺寸与整流罩材料GH536合金力学性能的相关试验研究。用拉伸试验和高周疲劳试验比较了不同晶粒尺寸试验件的性能差异。结果表明:GH536合金粗晶组织的强度和疲劳寿命显著低于正常组织。晶粒粗大引发的疲劳性能降低是导致本次故障发生的主要原因。In order to analyze the cause of the failure and improve the design,an experimental study on the relationship between grain size and mechanical properties of GH536 alloy was carried out.Tensile test and high cycle fatigue test were used to compare the properties of different grain sizes.The results show that the strength and fatigue life of coarse crystal GH536 alloy are significantly lower than that of normal alloy.The main reason for this failure is the decrease of fatigue performance caused by coarse grain.

关 键 词：航空发动机 火焰筒整流罩 晶粒尺寸 粗晶 力学性能 

分 类 号：V231.95[航空宇航科学与技术—航空宇航推进理论与工程]