一种用于镍基高温合金涡轮叶片高温疲劳测试并附加无损检测诊断的新方法。

A Novel Method for High Temperature Fatigue Testing of Nickel Superalloy Turbine Blades with Additional NDT Diagnostics.

作者信息

Kukla Dominik, Kopec Mateusz, Sitek Ryszard, Olejnik Aleksander, Kachel Stanisław, Kiszkowiak Łukasz

机构信息

Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawińskiego 5B, 02-106 Warsaw, Poland.

Department of Mechanical Engineering, Imperial College London, London SW7 2AZ, UK.

出版信息

Materials (Basel). 2021 Mar 12;14(6):1392. doi: 10.3390/ma14061392.

DOI:10.3390/ma14061392

PMID:33809373

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7999383/

Abstract

In this paper, a novel method for high temperature fatigue strength assessment of nickel superalloy turbine blades after operation at different times (303 and 473 h) was presented. The studies included destructive testing (fatigue testing at temperature 950 °C under cyclic bending load), non-destructive testing (Fluorescent Penetrant Inspection and Eddy Current method), and finite element modelling. High temperature fatigue tests were performed within load range from 5200 to 6600 N using a special self-designed blade grip attached to the conventional testing machine. The experimental results were compared with the finite element model generated from the ANSYS software. It was found that failure of turbine blades occurred in the area with the highest stress concertation, which was accurately predicted by the finite element (FE) model.

摘要

本文提出了一种用于评估镍基高温合金涡轮叶片在不同运行时间（303和473小时）后高温疲劳强度的新方法。研究包括破坏性测试（在950°C温度下循环弯曲载荷下的疲劳测试）、无损检测（荧光渗透检测和涡流检测方法）以及有限元建模。使用附着在传统试验机上的特殊自行设计的叶片夹具，在5200至6600N的载荷范围内进行了高温疲劳试验。将实验结果与ANSYS软件生成的有限元模型进行了比较。结果发现，涡轮叶片的失效发生在应力集中最高的区域，有限元（FE）模型对此进行了准确预测。