Monitoring microstructural evolution in-situ during cyclic deformation by high resolution reciprocal space mapping

6th International Conference on Fracture Fatigue and Wear

Diederichs, Annika M.^1 ; Thiel, Felix^1,2 ; Fischer, Torben^3 ; Lienert, Ulrich^4 ; Pantleon, Wolfgang^1

Department of Mechanical Engineering, Materials and Surface Engineering, Technical University of Denmark, Kgs. Lyngby

2800, Denmark^1

Institute for Metallic Materials, Leibniz Institute for Solid State and Materials Research, Dresden

01690, Germany^2

Helmholtz-Zentrum Geesthacht, Institute of Materials Research, Geesthacht

21502, Germany^3

DESY Photon Science, Deutsches Elektronen-Synchrotron, Hamburg

22607, Germany^4

关键词: Deformation structure;    Dislocation structures;    Polycrystalline aluminium;    Polycrystalline specimen;    Reciprocal space mapping;    Structural reorganization;    Synchrotron techniques;    Tension and compression;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/843/1/012031/pdf
DOI  :  10.1088/1742-6596/843/1/012031

来源: IOP

【 摘 要 】

The recently developed synchrotron technique High Resolution Reciprocal Space Mapping (HRRSM) is used to characterize the deformation structures evolving during cyclic deformation of commercially pure, polycrystalline aluminium AA1050. Insight into the structural reorganization within single grains is gained by in-situ monitoring of the microstructural evolution during cyclic deformation. By HRRSM, a large number of individual subgrains can be resolved within individual grains in the bulk of polycrystalline specimens and their fate, their individual orientation and elastic stresses, tracked during different loading regimes as tension and compression. With this technique, the evolution of dislocation structures in selected grains was followed during an individual load cycle.