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Signifcant impact of cold-rolling deformation and annealing on damping capacity of Fe-Mn-Cr alloy

Journal of Iron and Steel Research International 2020年第5期27卷 566-576页

作者： Bo Xia Xiao-ming Zhang R.D.K.Misra Ming-ming Pan Yu-qian Wang State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819LiaoningChina Laboratory for Excellence in Advanced Steel Research Department of MetallurgicalMaterials and Biomedical EngineeringUniversity of Texas at El PasoEl PasoTX 79668USA

The infuences of cold-rolling deformation and annealing on the damping capacity of Fe-19Mn-8Cr alloy were *** was observed that the cold-rolled Fe-19Mn-8Cr alloy with a reduction of 10%showed the relatively excellent damping capacity because of the relatively moreε-martensite and lower dislocation density,and the reduction of slopes of diferent damping curves increased along with increasing the cold-rolling ***,the subsequent annealing process can further enhance the damping *** 70%cold-rolling deformation,the austenite grain would grow up with the increase in the annealing temperature,which resulted in a signifcant change in the content and morphology ofε-martensite infuencing the damping capacity of the experimental *** damping capacity was optimum when annealed at 800°C for 30 min,displaying that the size ofε-martensite has a vital infuence on the damping capacity of the experimental *** study may enrich the fundamental knowledge about how to ameliorate the damping capacity of Fe-Mn-Cr damping steels.

关键词： Damping capacity Fe-19Mn-8Cr damping alloy ε-martensite α′-martensite Cold rolling

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Effect of Melt Scan Rate on Microstructure and Macrostructure for Electron Beam Melting of Ti-6Al-4V

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Materials Sciences and Applications 2012年第5期3卷 259-264页

作者： Karina Puebla Lawrence E. Murr Sara M. Gaytan Edwin Martinez Francisco Medina Ryan B. Wicker University of Texas at El Paso El Paso USA

Microstructure and variations in porosity in Ti-6Al-4V samples built with electron beam melting (EBM) over a range of melt scan speeds, ranging from 100 mm·s-1 to 1000 mm·s-1 were examined. Microstructure was characterized by refinement of α-phase and transformation to α′-martensite. Light optical microscopy, scanning electron microscopy, and transmission electron microscopy were used to observe these phenomena, while corresponding tensile testing and associated macro and microindentation hardness measurements were used to define the microstructural variations. Relative stiffness was observed to be linearly log-log related to relative density, corresponding to ideal porosity associated with open-cellular structures.

关键词： Electron Beam Melting Additive Manufacturing α-Phase and α′-martensite Optical and Electron Microscopy Melt-Scan Rate

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