Influence of Zn on the Microstructure and Mechanical Properties of Mg-Gd-Zr Alloy

Medientyp: E-Book

Titel: Influence of Zn on the Microstructure and Mechanical Properties of Mg-Gd-Zr Alloy

Beteiligte: Lei, Bin [Verfasser:in]; Dong, Zhihua [Verfasser:in]; Yang, Yan [Verfasser:in]; Jiang, Bin [Verfasser:in]; Yuan, Ming [Verfasser:in]; Yang, Huabao [Verfasser:in]; Wang, Qinghang [Verfasser:in]; Huang, Guangsheng [Verfasser:in]; Song, Jiangfeng [Verfasser:in]; Zhang, Dingfei [Verfasser:in]; Pan, Fusheng [Verfasser:in]

Erschienen: [S.l.]: SSRN, [2022]

Umfang: 1 Online-Ressource (25 p)

Sprache: Englisch

DOI: 10.2139/ssrn.4029636

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Beschreibung: Here, the microstructure and mechanical properties are investigated for the designed Mg-4Gd-0.5Zr-xZn (x = 0, 0.2, 0.5, 1.0 and 1.5 wt%) alloys with special emphasis on the effect of Zn. The results show that the designed Mg-4Gd-0.5Zr-xZn alloys exhibit the exceptional ductility. Among them, the Mg-4Gd-0.5Zr-1.0Zn and Mg-4Gd-0.5Zr-1.5Zn alloys show the elongation to fracture as high as 35.2% and 32.5%. Furthermore, a good strength-ductility balance is achieved in the alloys, which is basically ascribed to the grain refinement, texture softening and the precipitation of Zn-containing second phases. As Zn content increases from 0 to 1.5 wt%, the grain sizes of the extruded Mg-Gd-Zr-Zn alloy decrease from 6.02 to 3.05 μm, while the maximum texture intensity decreases from 11.13 to 5.24 m.r.d. Moreover, the Zn2Zr3 and Mg3Zn3Gd2 precipitates, which exhibit the completely coherent and semi-coherent orientation relationship with Mg matrix, are induced by the addition of Zn. These coherent and semi-coherent precipitates lead to noticeable strengthening effect and are not easy to become the source of crack, contributing to the high ductility in Mg-4Gd-0.5Zr-1.0Zn and Mg-4Gd-0.5Zr-1.5Zn

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