权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Investigating deformation microstructure evolution and transformation behaviour of steel using controlled thermomechanical compression

使用受控热机械压缩研究钢的变形微观结构演变和转变行为

基本信息

批准号：
EP/D074916/1
负责人：
W Rainforth
金额：
$ 5.13万
依托单位：
University of Sheffield
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2006
资助国家：
英国
起止时间：
2006 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=EP%2FD074916%2F1
关键词：
Investigating deformation microstructure evolution transformation

项目摘要

Over 95% of metallurgical products, both traditional and novel, undergo one or more thermomechanical processes in their production. The market place for such products is extremely competitive. Success requires the very best in quality, consistency and properties. This has led to a major challenge to develop 'designer microstructures' through predictive modelling and to process such materials to give entirely predictable properties. This can only be achieved through an integrated, multidisciplinary approach to materials development and materials processing and the effect on microstructure and texture development. To make this a reality requires elucidation and quantification of the processing variables that have a significant influence on the deformation induced microstructure and subsequent transformation and recrystallisation events that occur through the process route. Only when this has been achieved will there be sufficient scientific underpinning for the development of physically-based, through-process models to predict the ideal process route for a targeted microstructure and texture. The goal is to inform laboratory experiment and industrially based trials leading reduction cycle, improved productivity and enhanced material properties. This project aims to target some critical aspects of the modelling of microstructural evolution during thermomechanical processing by combining the expertise and world class hot working simulation facilities of the Institute for Microstructural and Mechanical Engineering: The University of Sheffield (IMMPETUS) with a six month visit to IMMPETUS by Professor Bevis Hutchinson (Head of Department of Mechanical Metallurgy, Corrosion and Metals Research Institute, Sweden). Prof Hutchinson is a renowned world expert in the fields of microstructure and texture evolution in hot and cold worked steels. His visit represents a unique opportunity for UK researchers and industrialists, particularly the many associated with the IMMPETUS programme, to gain first hand knowledge of the numerous factors that are believed to contribute to the generation of microstructure and texture in steels through the thermomechanical processing route. The main theme of Prof Hutchinson's visit will be: Further independent evidence of the proposed mechanisms for phase transformation and variant selection in steels. This area of research has received significant attention over recent years. However, there is only limited independent work investigating the many theories that have been proposed. Indeed, the theories cannot be fully validated because of the missing information, such as the starting texture in the austenite. However, a recently developed model austenitic alloy, developed by IMMPETUS, will allow, for the first time, this missing information to be derived. By using IMMPETUS' state-of-the-art thermomechanical compression simulator, we will validate or disprove the theories under controlled conditions and thereby clarify the critical process variables such that a clear modelling strategy can be developed. In addition, the visit of Prof Hutchinson will complement a wide range of work that is being done in IMMPETUS as well as introducing a number of new concepts into the IMMPETUS framework, in particular crystallographic texture evolution.

超过95%的冶金产品，无论是传统的还是新型的，在生产过程中都要经历一个或多个热机械过程。这些产品的市场竞争非常激烈。成功需要最好的质量、一致性和性能。这导致了一个重大挑战，即通过预测建模来开发“设计师微结构”，并处理这些材料以提供完全可预测的特性。这只能通过对材料开发和材料加工以及对微观结构和纹理发展的影响进行综合的多学科方法来实现。为了实现这一点，需要阐明和量化的加工变量，有一个显着的影响变形诱导的微观结构和随后的转变和再结晶事件，通过工艺路线发生。只有实现了这一点，才有足够的科学基础来开发基于物理的贯穿过程模型，以预测目标微观结构和纹理的理想工艺路线。其目标是为实验室实验和工业试验提供信息，从而缩短周期，提高生产率并增强材料性能。该项目旨在通过结合微观结构和机械工程研究所的专业知识和世界一流的热加工模拟设施，针对热机械加工过程中微观结构演变建模的一些关键方面：谢菲尔德大学（IMMPETUS），Bevis哈钦森教授（瑞典机械冶金、腐蚀和金属研究所系主任）对IMMPETUS进行了为期六个月的访问。哈钦森教授是世界著名的热加工和冷加工钢的微观结构和织构演变领域的专家。他的访问为英国研究人员和工业家提供了一个独特的机会，特别是与IMMPETUS计划相关的许多人，可以获得第一手知识，了解被认为有助于通过热机械加工路线在钢中产生微观组织和织构的众多因素。哈钦森教授此次访问的主题是：进一步独立证明钢中相变和变体选择的拟议机制。近年来，这一研究领域受到了极大的关注。然而，只有有限的独立工作调查的许多理论已经提出。事实上，由于缺少信息，例如奥氏体中的起始织构，这些理论不能完全验证。然而，最近开发的模型奥氏体合金，由IMMPETUS开发，将允许，第一次，这一缺失的信息来推导。通过使用IMMPETUS最先进的热机械压缩模拟器，我们将在受控条件下验证或反驳理论，从而阐明关键工艺变量，以便制定清晰的建模策略。此外，哈钦森教授的访问将补充IMMPETUS正在进行的广泛工作，并将一些新概念引入IMMPETUS框架，特别是晶体织构演化。