Homogenization and texture development in rapidly solidified AZ91E consolidated by Shear Assisted Processing and Extrusion (ShAPE)

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:701

Article

Overman, N. R.¹  Whalen, S. A.¹  Bowden, M. E.^1,2  Olszta, M. J.¹  Kruska, K.¹  Clark, T.³  Stevens, E. L.⁴  Darsell, J. T.¹  Joshi, V. V.¹  Jiang, X.¹  Mattlin, K. F.¹  Mathaudhu, S. N.^1,3 

[1] Pacific Northwest Natl Lab, POB 999, Richland, WA 99352 USA

[2] EMSL, 3335 Innovat Blvd, Richland, WA 99354 USA

[3] Univ Calif Riverside, 3401 Watkins Dr, Riverside, CA 92521 USA

[4] Univ Pittsburgh, 4200 5th Ave, Pittsburgh, PA 15260 USA

关键词: Rapid solidification;    Magnesium alloy;    Microstructure;    ShAPE;    Friction consolidation extrusion;    EBSD;   

DOI  :  10.1016/j.msea.2017.06.062

来源: Elsevier

【 摘 要 】

Shear Assisted Processing and Extrusion (ShAPE) -a novel processing route that combines high shear and extrusion conditions- was evaluated as a processing method to densify melt spun magnesium alloy (AZ91E) flake materials. This study illustrates the microstructural regimes and transitions in crystallographic texture that occur as a result of applying simultaneous linear and rotational shear during extrusion. Characterization of the flake precursor and extruded tube was performed using scanning and transmission electron microscopy, x-ray diffraction and microindentation techniques. Results show a unique transition in the orientation of basal texture development. Despite the high temperatures involved during processing, uniform grain refinement and material homogenization are observed. These results forecast the ability to implement the ShAPE processing approach for a broader range of materials with novel microstructures and high performance.

【 授权许可】

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