An Experimental and Modelling study of the Evolution of Inelastic Strain and its Implications to Re-crystallisation in Single Crystal Turbine Blades

单晶涡轮叶片非弹性应变演化及其对再结晶影响的实验和建模研究

• 批准号: 2296251
• 金额: --
• 依托单位: University of Birmingham
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2296251
• 关键词: Experimental; Modelling; study; Evolution; Inelastic

The overall aim of the project is to develop a microstructure-sensitive constitutive description of creep of gamma prime strengthened superalloys under extreme temperature conditions. The temperature range of interest will be between 1300oC and 1150oC with specific consideration to re-crystallisation during subsequent heat treatment in turbine blades. The work will involve identification of dominant deformation mechanisms and understanding of the microstructure in the conditions of interest, specifically through the use of miniature testing with small gauge volumes of the order of the length scale of micro-segregation. From this information, it is hoped to derive evolution relations for the micro-mechanisms. An appropriate state variable approach will be developed to couple the interaction of the initial microstructure state and its evolution on the creep strain-time trajectories. An emphasis will be placed on experimentally deriving an equation for the inelastic strain that can be used to predict the evolution of plastic strain in modelling activities.

该项目的总体目标是开发一种对极端温度条件下伽马强化高温合金蠕变的微观结构敏感本构描述。感兴趣的温度范围将在 1300oC 至 1150oC 之间，并特别考虑涡轮叶片后续热处理期间的再结晶。这项工作将涉及识别主要变形机制并了解感兴趣条件下的微观结构，特别是通过使用微观偏析长度尺度的小规格体积的微型测试。希望从这些信息中得出微观机制的演化关系。将开发适当的状态变量方法来耦合初始微观结构状态及其在蠕变应变-时间轨迹上的演化的相互作用。重点将放在通过实验推导非弹性应变方程，该方程可用于预测建模活动中塑性应变的演变。