Creep resistant zinc alloys: Towards thermodynamic and mechanical stability by microalloying

抗蠕变锌合金：通过微合金化实现热力学和机械稳定性

• 批准号: 316450342
• 负责人: Professorin Dr. Sandra Korte-Kerzel, Ph.D.
• 金额: --
• 依托单位: Institut für Metallurgie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/316450342?language=en
• 关键词: Creep; resistant; zinc; alloys; Towards

The aim of this project is to provide new alloy design strategies for zinc alloys offering an improved creep resistance. To this end, a dual approach has been followed in a previous project, in which both the available thermodynamic data of the Zn-Al-Cu-(Mg) system as well as the microstructural and mechanical properties of respective alloys with different magnesium contents have been studied in detail, based both on a die-cast and several gravity cast alloys. The addition of magnesium has yielded some promising improvements in mechanical properties within this previous project. Therefore a proposal for a new project is made during which the successfully combined thermodynamic and microstructural/mechanical characterisation approach will be continued. The focus will be placed on the mechanisms of mechanical (in)stability and in particular on precipitation and decomposition phenomena by using high resolution characterization methods and modelling of the essential thermodynamic equilibrium states. While the investigation of deformation mechanisms will initially focus on micro- and nanomechanical testing at different strain rates and temperatures in correlation with TEM and APT in order to further elucidate the role of the individual microstructural components, the thermodynamic assessment will concentrate on a new alloying element, Ti, in order to provide guidelines for promising alloy compositions. Small-scale specimens produced by induction melting with rapid solidification will be used for both, nanomechanical and thermodynamic characterization. That allows an efficient joint experimental programme and also to capitalize on the combined insights from both parts of the project into how to improve the microstructure regarding the major components using the essential thermodynamic basis. Based on the acquired knowledge concerning deformation characteristics, precipitation and decomposition phenomena and the resulting mechanical properties of new Zn-Al-Cu-(Mg, Ti) alloys, the projects aims to provide future alloy design strategies for Zn alloys with improved mechanical stability and creep resistance.

该项目的目的是为锌合金提供新的合金设计策略，从而具有改善的蠕变耐药性。为此，在先前的项目中遵循了双重方法，其中Zn-Al-Cu-（mg）系统的可用热力学数据以及具有不同镁含量的各个合金的微结构和机械性能都具有不同的镁含量。详细研究了基于压铸和几种重力铸造合金。镁的添加在上一个项目的机械性能方面取得了一些有希望的改善。因此，将对成功组合的热力学和微结构/机械表征方法进行新项目的建议。通过使用高分辨率表征方法和基本热力学平衡状态的建模，将重点放在机械（IN）稳定性的机制上，尤其是降水和分解现象。虽然对变形机制的研究最初将以不同的应变速率和温度与TEM和APT相关性和APT相关，以进一步阐明单个微观结构成分的作用，但热力学评估将集中于新的合金元素上，ti，为了提供有前途合金组成的指南。纳米力学和热力学表征将使用引起熔化产生的小尺度标本。这允许有效的联合实验计划，并可以利用项目的两个部分的合并见解，以如何使用基本热力学基础来改善主要组成部分的微观结构。基于有关变形特性，降水和分解现象的知识，以及新的Zn-Al-Cu-（Mg，Ti）合金的机械性能，这些项目旨在为Zn合金提供未来的合金设计策略，并提高机械稳定性和机械稳定性和机械稳定性和机械稳定性和蠕变阻力。

项目成果

Creep behaviour of eutectic Zn-Al-Cu-Mg alloys

• DOI: 10.1016/j.msea.2018.03.068
• 发表时间: 2018-05
• 期刊: Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
• 影响因子: 6.4
• 作者: Zhicheng Wu;S. Sandlöbes;Yufeng Wang;J. Gibson;S. Korte-Kerzel

Phase equilibria of the Zn-Ti system: Experiments, first-principles calculations and Calphad assessment

• DOI: 10.1016/j.calphad.2018.12.009
• 发表时间: 2019-03
• 期刊: Calphad
• 作者: Song-Mao Liang;H. Singh;Hongbin Zhang;R. Schmid-Fetzer

Local mechanical properties and plasticity mechanisms in a Zn-Al eutectic alloy

• DOI: 10.1016/j.matdes.2018.07.051
• 发表时间: 2018-11-05
• 期刊: MATERIALS & DESIGN
• 影响因子: 8.4
• 作者: Wu, Zhicheng;Sandloebes, Stefanie;Korte-Kerzel, Sandra
• 通讯作者: Korte-Kerzel, Sandra