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个微观结构敏感的本构描述蠕变的γ '强化高温合金在极端温度条件下。关注的温度范围将在1300 oC和1150 oC之间，特别考虑到涡轮机叶片后续热处理期间的再结晶。这项工作将涉及识别主要的变形机制和理解的微观结构的条件下的利益，特别是通过使用微型测试与小计量体积的顺序的长度尺度的微观偏析。从这些信息中，它是希望得到的微观机构的演化关系。一个适当的状态变量的方法将被开发耦合的初始微观结构状态的相互作用和它的蠕变应变-时间轨迹的演变。重点将放在实验推导出的非弹性应变，可用于预测建模活动中的塑性应变的演变方程。