|Microstructural evolution and superplastic behavior in friction stir processed Mg-Li-Al-Zn alloy|
|F. C. Liu; M. J. Tan; J. Liao; Z. Y. Ma; Q. Meng; K. Nakata
|Source Publication||Journal of Materials Science
|Abstract||A Mg-Li-Al-Zn alloy was friction stir processed (FSP) under water, and the microstructures and superplastic behavior in the FSP alloy were investigated. The FSP Mg-Li-Al-Zn alloy consisted of a mixed microstructure with fine, equiaxed, and recrystallized alpha (hcp) and beta (bcc) grains surrounded by high-angle grain boundaries, and the average grain size of the alpha and beta grains was similar to 1.6 and similar to 6.8 mu m, respectively. The fine alpha grains played a critical role in providing thermal stability for the beta grains. The FSP Mg-Li-Al-Zn alloy exhibited low-temperature superplasticity with a ductility of 330 % at 100 A degrees C and high strain rate superplasticity with ductility of a parts per thousand yen400 % at 225-300 A degrees C. Microstructural examination and superplastic data analysis revealed that the dominant deformation mechanism for the FSPed Mg-Li-Al-Zn alloy is grain boundary sliding, which is controlled by the grain boundary diffusion in the beta phase.|
|description.department||[liu, f. c.
; tan, m. j.] nanyang technol univ, sch mech & aerosp engn, singapore 639798, singapore. [liu, f. c.
; nakata, k.] osaka univ, jwri, osaka 5670047, japan. [liao, j.] kurimoto ltd, osaka 5590021, japan. [ma, z. y.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [meng, q.] beijing aeronaut mfg technol res inst, beijing 100024, peoples r china.
; liu, fc (reprint author), nanyang technol univ, sch mech & aerosp engn, singapore 639798, singapore.
|Keyword||Strain Rate Superplasticity
F. C. Liu,M. J. Tan,J. Liao,et al. Microstructural evolution and superplastic behavior in friction stir processed Mg-Li-Al-Zn alloy[J]. Journal of Materials Science,2013,48(24):8539-8546.
F. C. Liu,M. J. Tan,J. Liao,Z. Y. Ma,Q. Meng,&K. Nakata.(2013).Microstructural evolution and superplastic behavior in friction stir processed Mg-Li-Al-Zn alloy.Journal of Materials Science,48(24),8539-8546.
F. C. Liu,et al."Microstructural evolution and superplastic behavior in friction stir processed Mg-Li-Al-Zn alloy".Journal of Materials Science 48.24(2013):8539-8546.
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