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首页> 外文期刊>Materials at High Temperatures >A review of thermo-mechanical fatigue behaviour in polycrystaliine nickel superalloys for turbine disc applications
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A review of thermo-mechanical fatigue behaviour in polycrystaliine nickel superalloys for turbine disc applications

机译：涡轮盘应用的多晶镍高温合金的热机械疲劳行为综述

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摘要

Within the gas turbine engine, the high transient thermal stresses resulting from throttle movement from idle to high settings give rise to the phenomenon of thermo-mechanical fatigue (IMF). These effects have been widely explored for turbine blade materials, typically single crystal nickel alloys. More recently however, a combination of thinner disc rims and further increases in turbine entry temperature has led to a situation where TMF in disc materials cannot be ignored. Turbine discs will usually be manufactured from polycrystaliine nickel alloys, and as such it is now considered critical that TMF effects in this system of alloys is fully characterised. The current paper seeks to summarise the published work on TMF in polycrystaliine nickel alloys for turbine disc applications, whilst introducing recent work at Swansea University. Previous research has concentrated particularly on the differences between in-phase (IP) and out-of-phase (OP) loading. The current work from Swansea indicates that this approach is overly simplistic and that for a complete evaluation of the alloy, intermediate phase angles should also be considered.
机译：在燃气涡轮发动机内，由于节气门从怠速运动到高设定而产生的高瞬态热应力会引起热机械疲劳（IMF）现象。对于涡轮叶片材料，通常是单晶镍合金，已广泛探索了这些效果。然而，近来，更薄的盘边缘和涡轮入口温度的进一步增加的组合导致了盘材料中的TMF不可忽视的情况。涡轮机盘通常将由多晶镍合金制成，因此，现在被认为至关重要的是要充分表征这种合金体系中的TMF效应。本论文旨在总结已发表的有关涡轮盘应用的多晶镍合金中TMF的工作，同时介绍斯旺西大学的最新工作。先前的研究主要集中在同相（IP）和异相（OP）负载之间的差异。斯旺西（Swansea）的最新工作表明，这种方法过于简单，为了全面评估合金，还应考虑中间相角。

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