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Crater-formation-induced metastable structure in an AISI D2 steel treated with a pulsed electron beam |
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| Authors: | Kemin Zhang Jianxin Zou Thierry Grosdidier Chuang Dong |
| Affiliation: | a School of Materials Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai 201620, PR China b Shanghai Engineering Research Center of Mg Materials and Applications & National Engineering Research Center of Light Alloys Net Forming, Shanghai Jiao Tong University, Shanghai 200240, PR China c Laboratoire d’Etude des Textures et Applications aux Matériaux (LETAM CNRS 3143), Université Paul Verlaine Metz, Ile du Saulcy, 57045 Metz, France d Key Laboratory of Materials Modification by Laser, Electron and Ion Beams, Dalian University of Technology, Dalian 116024, China |
| Abstract: | A detailed investigation concerning the microstructure and phase formations in the crater-erupted areas formed under low energy high current pulsed electron beam bombardment has been carried out for a treated AISI D2 steel. The crater formations are initiated at carbides. Such carbide eruption events change the composition, phase selection and grain growth behaviour inside the craters. Under these extremely non-equilibrium conditions, amorphous patches and feathery type structures containing twinned nano-grains are retained. |
| Keywords: | Low energy high current pulsed electron beam (LEHCPEB) D2 steel Craters Nano-twins Feathery structures Amorphous |
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