Mechanism-oriented characterization of the microstructural and load direction-dependent cyclic creep (ratcheting) behavior of the magnesium alloy WE43

镁合金 WE43 微观结构和载荷方向相关循环蠕变(棘轮)行为的机制导向表征

基本信息

项目摘要

The aim of the second phase of the project is the application and further development of the successfully validated test strategies to the high strength and creep resistant magnesium alloy WE43. Compared to the DieMag422 and AE42 magnesium alloys characterized in the first phase of the project, this alloy exhibits significantly higher mechanical strength and permissible operating temperature. In the typical field of applications of the WE43 alloy (e.g. aerospace and motorsports) cyclic creep is of significant importance. In the first phase of the project, it became very obvious that a complete identification of the creep and failure mechanisms as well as an understanding of their interaction and evolution are only possible by a systematic investigation of the influence of the microstructure. Consequently, the interrelation between process, structure, material properties and damage must be considered. Therefore, the two manufacturing processes of casting (low cooling rate and large grain size) and additive manufacturing (high cooling rate and small grain size) in laser-powder bed fusion (L-PBF) are intended to produce two different microstructural states, compare them, and separate the mechanisms.While the casted WE43 has already been established for automotive and aerospace applications, the additively manufactured WE43 is not. Within the framework of the investigations, the influences of the two manufacturing processes and their resulting microstructures on the cyclic creep behavior should, therefore, be characterized as well as microstructure- and mechanism-oriented evaluated and described based on mathematical models. The scientific aim is the correlation of the microstructure (e.g. grain size, precipitation, hardening, softening behavior) and process-related defects (e.g. gas and shrinkage porosity, bonding defects) with the cyclic creep properties (e.g. fatigue strength, cyclic creep rates). The test devices developed in the first phase of the project are already designed for the higher test temperatures and forces and the test methods will be consistently further developed. Within static tension and compression creep tests as well as single- and multi-step fatigue tests in tensile and compression modes, the direction-dependent differences in material behavior with and without superimposed fatigue loading shall be analyzed and understood. The mechanisms of static creep should be separated from cyclic creep in order to provide information on their interaction and evolution. Using scanning electron microscopy and computed tomography, the influence of microstructure and defects of selected fatigue specimens will be investigated to determine how to maximize their lifetime by the process-induced microstructure. Finally, the results of the first and second phases of the project will be combined, and the resulting correlation models will be expanded by the casted and additive-manufactured WE43 alloy.
该项目第二阶段的目标是将成功验证的测试策略应用于高强度和抗蠕变镁合金WE 43并进一步开发。与项目第一阶段的DieMag 422和AE 42镁合金相比,该合金具有更高的机械强度和允许工作温度。在WE 43合金的典型应用领域(例如航空航天和赛车运动)中,循环蠕变非常重要。在项目的第一阶段,很明显,只有通过系统研究微观结构的影响,才能完全识别蠕变和失效机制,并了解它们的相互作用和演变。因此,必须考虑工艺、结构、材料性能和损伤之间的相互关系。因此,激光-粉末床熔融(L-PBF)中的铸造(低冷却速率和大晶粒尺寸)和增材制造(高冷却速率和小晶粒尺寸)这两种制造工艺旨在产生两种不同的微观结构状态,比较它们,并分离机制。虽然铸造的WE 43已经用于汽车和航空航天应用,但增材制造的WE 43还没有。在调查的框架内,两个制造过程及其产生的微观结构对循环蠕变行为的影响,因此,应被表征以及微观结构和机制为导向的评估和描述的基础上的数学模型。科学目的是将微观结构(例如晶粒尺寸、沉淀、硬化、软化行为)和工艺相关缺陷(例如气孔和收缩孔隙、粘结缺陷)与循环蠕变性能(例如疲劳强度、循环蠕变速率)相关联。在项目第一阶段开发的测试设备已经设计用于更高的测试温度和力,并且测试方法将不断进一步开发。在静态拉伸和压缩蠕变试验以及拉伸和压缩模式下的单步和多步疲劳试验中,应分析和理解在有和没有叠加疲劳载荷的情况下材料行为的方向相关差异。静态蠕变的机制应该从循环蠕变中分离出来,以便提供关于它们之间相互作用和演变的信息。使用扫描电子显微镜和计算机断层扫描,微观结构和选定的疲劳试样的缺陷的影响将进行调查,以确定如何最大限度地提高其寿命的过程中引起的微观结构。最后,该项目第一阶段和第二阶段的结果将结合起来,并通过铸造和增材制造的WE 43合金扩展所产生的相关模型。

项目成果

期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)

数据更新时间:{{ journalArticles.updateTime }}

{{ item.title }}
{{ item.translation_title }}
  • DOI:
    {{ item.doi }}
  • 发表时间:
    {{ item.publish_year }}
  • 期刊:
  • 影响因子:
    {{ item.factor }}
  • 作者:
    {{ item.authors }}
  • 通讯作者:
    {{ item.author }}

数据更新时间:{{ journalArticles.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ monograph.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ sciAawards.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ conferencePapers.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ patent.updateTime }}

Professor Dr.-Ing. Frank Walther其他文献

Professor Dr.-Ing. Frank Walther的其他文献

{{ item.title }}
{{ item.translation_title }}
  • DOI:
    {{ item.doi }}
  • 发表时间:
    {{ item.publish_year }}
  • 期刊:
  • 影响因子:
    {{ item.factor }}
  • 作者:
    {{ item.authors }}
  • 通讯作者:
    {{ item.author }}

{{ truncateString('Professor Dr.-Ing. Frank Walther', 18)}}的其他基金

Microstructure- and mechanism-correlated characterization of the corrosion fatigue behavior of the creep-resistant magnesium alloys DieMag422 and AE42
抗蠕变镁合金 DieMag422 和 AE42 腐蚀疲劳行为的微观结构和机理相关表征
  • 批准号:
    258700985
  • 财政年份:
    2014
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Microstructure-based understanding of the test frequency influence on the corrosion fatigue behaviour of austenite AISI 304L joints brazed with nickel based filler metal
基于微观结构的理解测试频率对镍基填充金属钎焊的奥氏体 AISI 304L 接头腐蚀疲劳行为的影响
  • 批准号:
    264915567
  • 财政年份:
    2014
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Mechanism-based characterization of the fatigue and corrosion fatigue properties of addtively manufactured TPMS lattice structures under physiological conditions
基于机理的生理条件下额外制造的 TPMS 晶格结构的疲劳和腐蚀疲劳特性表征
  • 批准号:
    495860364
  • 财政年份:
  • 资助金额:
    --
  • 项目类别:
    Research Units
Alloying- and microstructure-based fatigue life characterisation and prediction of vacuum brazed AISI 304L/NiFeCrSiB joints in corrosive environments
腐蚀环境中真空钎焊 AISI 304L/NiFeCrSiB 接头基于合金和微观结构的疲劳寿命表征和预测
  • 批准号:
    408904168
  • 财政年份:
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Coordination Funds
协调基金
  • 批准号:
    495857095
  • 财政年份:
  • 资助金额:
    --
  • 项目类别:
    Research Units
Mechanism-based development and validation of a structural health monitoring for climate adaptive architectural Cottonid elements
基于机制的气候适应性建筑 Cottonid 元件结构健康监测的开发和验证
  • 批准号:
    325009350
  • 财政年份:
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Greybox model-based prediction of wear evolution of coated tools through experimental and model-driven identification of relevant loads
通过实验和模型驱动的相关载荷识别,基于灰盒模型预测涂层刀具的磨损演变
  • 批准号:
    521377466
  • 财政年份:
  • 资助金额:
    --
  • 项目类别:
    Priority Programmes

相似国自然基金

炭包覆纳米晶的"Oriented Attachment"生长及其多维结构构筑
  • 批准号:
    51572015
  • 批准年份:
    2015
  • 资助金额:
    64.0 万元
  • 项目类别:
    面上项目

相似海外基金

Characterization of Mechanisms of Exercise Intolerance in Patients at Risk for Heart Failure with Preserved Ejection Fraction
射血分数保留的心力衰竭风险患者运动不耐受机制的特征
  • 批准号:
    10570802
  • 财政年份:
    2023
  • 资助金额:
    --
  • 项目类别:
Characterization of Longitudinal EEG Biomarkers in Chronic Low Back Pain
慢性腰痛的纵向脑电图生物标志物的表征
  • 批准号:
    10724084
  • 财政年份:
    2023
  • 资助金额:
    --
  • 项目类别:
Validation of a pediatric thrombosis risk assessment model and characterization of bleeding in hospitalized children through the Children's Hospital Acquired Thrombosis (CHAT) Consortium
通过儿童医院获得性血栓 (CHAT) 联盟验证儿科血栓风险评估模型和住院儿童出血特征
  • 批准号:
    10426594
  • 财政年份:
    2022
  • 资助金额:
    --
  • 项目类别:
Validation of a pediatric thrombosis risk assessment model and characterization of bleeding in hospitalized children through the Children's Hospital Acquired Thrombosis (CHAT) Consortium
通过儿童医院获得性血栓 (CHAT) 联盟验证儿科血栓风险评估模型和住院儿童出血特征
  • 批准号:
    10673606
  • 财政年份:
    2022
  • 资助金额:
    --
  • 项目类别:
Precision characterization of antimicrobial resistance gene dynamics in bloodstream infection risk after hematopoietic stem cell transplantation
造血干细胞移植后血流感染风险中抗菌药物耐药基因动态的精确表征
  • 批准号:
    10487458
  • 财政年份:
    2021
  • 资助金额:
    --
  • 项目类别:
Precision characterization of antimicrobial resistance gene dynamics in bloodstream infection risk after hematopoietic stem cell transplantation
造血干细胞移植后血流感染风险中抗菌药物耐药基因动态的精确表征
  • 批准号:
    10686240
  • 财政年份:
    2021
  • 资助金额:
    --
  • 项目类别:
Precision characterization of antimicrobial resistance gene dynamics in bloodstream infection risk after hematopoietic stem cell transplantation
造血干细胞移植后血流感染风险中抗菌药物耐药基因动态的精确表征
  • 批准号:
    10283374
  • 财政年份:
    2021
  • 资助金额:
    --
  • 项目类别:
Insights into the Lid Margin: Characterization of Membrane Associated Mucins in Ocular Surface Disease
深入了解眼睑边缘:眼表疾病中膜相关粘蛋白的特征
  • 批准号:
    9918909
  • 财政年份:
    2020
  • 资助金额:
    --
  • 项目类别:
Harnessing Clinical Genomic Characterization to Accelerate Translational Advances for Patients with IDD
利用临床基因组特征加速 IDD 患者的转化进展
  • 批准号:
    9976668
  • 财政年份:
    2020
  • 资助金额:
    --
  • 项目类别:
Harnessing Clinical Genomic Characterization to Accelerate Translational Advances for Patients with IDD
利用临床基因组特征加速 IDD 患者的转化进展
  • 批准号:
    10629203
  • 财政年份:
    2020
  • 资助金额:
    --
  • 项目类别:
{{ showInfoDetail.title }}

作者:{{ showInfoDetail.author }}

知道了