Experimental analysis of low-cycle and creep fatigue for directionally solidified DZ125 with a hole

ZHOU Tian-peng; YANG Xiao-guang; HOU Gui-cang; SHI Duo-qi; CONG Pei-hong

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Experimental analysis of low-cycle and creep fatigue for directionally solidified DZ125 with a hole

更新时间：2026-07-07

- Experimental analysis of low-cycle and creep fatigue for directionally solidified DZ125 with a hole
- Vol. 22, Issue 9, (2007)
- 作者机构：
  
  1. 北京航空航天大学能源与动力工程学院,北京,100083
  2. 中国航空工业第一集团公司沈阳发动机设计研究所,沈阳,110015
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2007
- 稿件说明：
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ZHOU Tian-peng, YANG Xiao-guang, HOU Gui-cang, et al. Experimental analysis of low-cycle and creep fatigue for directionally solidified DZ125 with a hole[J]. 2007, 22(9).
DOI：

ZHOU Tian-peng, YANG Xiao-guang, HOU Gui-cang, et al. Experimental analysis of low-cycle and creep fatigue for directionally solidified DZ125 with a hole[J]. 2007, 22(9). DOI：

摘要

进行了定向结晶合金DZ125带小孔构件在高温下的低循环/保载疲劳试验.此构件试验用来部分模拟航空发动机气膜冷却的空心涡轮转子叶片

试验方案根据空心涡轮转子叶片的几何特征和所承受的温度及载荷状况来设计.介绍了试验方案和试验结果分析

包括寿命分析、试验裂纹扩展规律分析和金相分析.结果表明小孔应力集中和保载是构件破坏的主要原因

孔边电火花加工特征对裂纹萌生起到决定性影响.

Abstract

A low-cycle/creep fatigue test was conducted for directionally solidified DZ125 component with a hole under high temperature conditions.The purpose of this test was to simulate hollow turbine rotor blade for film cooling of aeroengine.The test scheme was planned according to geometric characteristics

temperature and load conditions of hollow turbine rotor blade.The test scheme and test results were described

covering ser-vice life analysis

crack expansion analysis and metallographic analysis.The results show that holes' stress con-centration and creep are major contributing factor to the damage of components

and electric discharge machine(EDM) hole features is decisive to the crack initiation.

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Related Institution

Shenyang Aero Engine Research Institute

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