Quantifying Damage Accumulation During Ductile Plastic Deformation Using Synchrotron Radiation

Suter, Robert M.¹  Rollett, Anthony D.¹ 

[1] Carnegie Mellon Univ., Pittsburgh, PA (United States)

关键词: polycrystalline materials;    plasticity;    synchrotron radiation;   

DOI  :  10.2172/1292100
RP-ID  :  DOE-CMU--0002001
PID  :  OSTI ID: 1292100

学科分类：材料科学（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

Under this grant, we have developed and demonstrated the ability of near-field High Energy Diffraction Microscopy (nf-HEDM) to map crystal orientation fields over three dimensions in deformed polycrystalline materials. Experimental work was performed at the Advanced Photon Source (APS) at beamline 1-ID. Applications of this new capability to ductile deformation of copper and zirconium samples were demonstrated as was the comparison of the experimental observations to computational plasticity models using a fast Fourier transform based algorithm that is able to handle the large experimental data sets. No such spatially resolved, direct comparison between measured and computed microstructure evolutions had previously been possible. The impact of this work is reflected in numerous publications and presentations as well as in the investments by DOE and DOD laboratories of millions of dollars in applying the technique, developing sophisticated new hardware that allows the technique to be applied to a wide variety of materials and materials problems, and in the use of the technique by other researchers. In essence, the grant facilitated the development of a new form of three dimensional microscopy and its application to technologically critical states of polycrystalline materials that are used throughout the U.S. and world economies. On-going collaborative work is further optimizing experimental and computational facilities at the APS and is pursuing expanded facilities.