Defornation mechanisms in the nanolamellar composite Cu-Nb

纳米层状复合材料 Cu-Nb 的变形机制

• 批准号: 230330276
• 负责人: Professor Dr. Werner Skrotzki
• 金额: --
• 依托单位: Professur für Metallphysik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2012
• 资助国家: 德国
• 起止时间: 2011-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/230330276?language=en
• 关键词: Defornation; mechanisms; nanolamellar; composite; Cu

The plastic behaviour and microstructural stability of nanolamellar metallic composites are of paramount importance for practical applications since most of the beneficial mechanical properties are related to the diminished length scales (i.e. layer thickness, grain size in the layers) in the material. The model system Cu/Nb produced with different layer thicknesses of 1000 - 10 nm is chosen for investigations of the mechanical properties by tensile tests at low temperatures including 4 K tests. Based on temperature and strain rate change tests thermal activation analysis is used to determine the athermal influence of grain size (or rather layer thickness) on the total stress measured in the experiment allowing a precise analysis of the Hall-Petch relationship. Moreover, thermal activation analysis results in information about the elementary deformation mechanisms dominating the plastic behaviour of the material. Besides, there is interest in the influence of temperature on deformation localization through the development of micro and macro shear bands in the layers and across the layer boundaries. The extent and effects of deformation localization will be analyzed by electron microscopy.

纳米片层金属复合材料的塑性行为和微观结构稳定性对实际应用至关重要，因为大多数有利的力学性能都与材料中长度尺度的减小(即层厚度、层中的晶粒度)有关。选取具有不同厚度(1000-10 nm)的CuNb模型体系，通过包括4K拉伸在内的低温拉伸实验研究了材料的力学性能。基于温度和应变率变化测试，热激活分析被用来确定晶粒度(或更确切地说，层厚度)对实验中测量的总应力的非热影响，从而能够精确地分析Hall-Petch关系。此外，热激活分析还提供了有关主导材料塑性行为的基本变形机制的信息。此外，还研究了温度对变形局部化的影响，这种影响是通过层内和跨层边界的微观和宏观剪切带的发展来实现的。用电子显微镜分析形变局部化的程度和影响。

项目成果

Microstructure, Texture, and Mechanical Properties of Laminar Metal Composites Produced by Accumulative Roll Bonding

• DOI: 10.1002/adem.201800210
• 发表时间: 2018-08
• 期刊: Advanced Engineering Materials
• 影响因子: 3.6
• 作者: J. Scharnweber;P. Chekhonin;C. Oertel;J. Romberg;J. Freudenberger;Jörn Jaschinski;W. Skrotzki

Processing of High Strength Light‐Weight Metallic Composites

• DOI: 10.1002/adem.201400190
• 发表时间: 2014-10
• 期刊: Advanced Engineering Materials
• 影响因子: 3.6
• 作者: W. Skrotzki;A. Eschke;J. Romberg;J. Scharnweber;T. Marr;R. Petters;I. Okulov;C. Oertel;J. Freudenberger;U. Kühn;L. Schultz;J. Eckert

New experimental insight into the mechanisms of nanoplasticity

• DOI: 10.1016/j.actamat.2013.08.032
• 发表时间: 2013-11-01
• 期刊: ACTA MATERIALIA
• 影响因子: 9.4
• 作者: Skrotzki, W.;Eschke, A.;Kurmanaeva, L.
• 通讯作者: Kurmanaeva, L.

Shear banding in sub-microcrystalline nickel at 4 K

4 K 亚微晶镍中的剪切带

• DOI: 10.1016/j.mechmat.2013.05.018
• 发表时间: 2013
• 期刊: Mechanics of Materials
• 影响因子: 3.9
• 作者: S.R. Dey;L. Hollang;B. Beausir;E. Hieckmann;W. Skrotzki
• 通讯作者: W. Skrotzki

Deformation mechanisms of nil temperature ductile polycrystalline B2 intermetallic compound YAg

零温韧性多晶B2金属间化合物YAG的变形机制

• DOI: 10.1016/j.actamat.2018.03.064
• 发表时间: 2018
• 期刊: Acta Materialia
• 影响因子: 9.4
• 作者: R. Schaarschuch;C.-G. Oertel;G.H. Cao;J. Freudenberger;W.Skrotzki
• 通讯作者: W.Skrotzki